Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-12-18T18:25:58Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_generoso_ferreira.pdf: 1487910 bytes, checksum: 5d8038ca69034b764ba796a3a18d0907 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-01-03T17:13:11Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_generoso_ferreira.pdf: 1487910 bytes, checksum: 5d8038ca69034b764ba796a3a18d0907 (MD5) / Made available in DSpace on 2018-01-03T17:13:11Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_generoso_ferreira.pdf: 1487910 bytes, checksum: 5d8038ca69034b764ba796a3a18d0907 (MD5) Previous issue date: 2017 / O agricultor deve adequar-se ?s exig?ncias da nova legisla??o ambiental brasileira, quanto ? recupera??o de ?reas de preserva??o permanente e reserva legal. Um dos problemas que o produtor pode enfrentar ? a recupera??o de ?reas degradadas, que podem conter, entre outros contaminantes, res?duos de herbicidas. O 2,4-D e picloram s?o herbicidas hormonais mimetizadores de auxina. Entre os grupos vegetais, as esp?cies das matas ciliares t?m sido pouco relatadas quanto aos efeitos de res?duos desses herbicidas no ambiente. As an?lises micromorfol?gicas e micromorfom?tricas s?o ferramentas importantes no aux?lio do diagn?stico precoce da inj?ria, visto que modifica??es vis?veis podem aparecer em fase tardia da intoxica??o. Objetivou-se com este trabalho avaliar o desenvolvimento inicial de dez esp?cies arb?reas em substrato com res?duos da mistura de herbicidas 2,4-D+picloram e verificar os efeitos nas modifica??es anat?micas foliares de Mabea fistulifera e Zeyheria tuberculosa. Em delineamento em blocos ao acaso com tr?s repeti??es, foram distribu?dos 40 tratamentos em esquema fatorial 4x10. O primeiro fator foi composto por quatro doses da mistura comercial de 2,4-D+picloram correspondentes a 0,00; 0,166; 0,333 e 0,666 g ha-1 (Tordon?, contendo 240 g de 2,4-D e 64 g de picloram por litro). O segundo fator foi composto por dez esp?cies arb?reas: Machaerium opacum Vogel, Machaerium nyctitans (Vell.) Benth., Cassia ferruginea (Schrad.) Schrad. ex DC., Senna macranthera (DC. ex. Collad.) H.S. Irwin e Barnaby, Anadenanthera colubrina (Vell.), Brenan, Senegalia polyphylla (DC.) Britton e Rose, Piptadenia gonoacantha (Mart.) J.F. Macbr., Dalbergia villosa (Benth.) Benth., Mabea fistulifera Mart. e Zeyheria tuberculosa (Vell) Bureau ex Verl. Avalia??es morfol?gicas e anat?micas em plantas jovens foram realizadas conforme a metodologia padr?o. Para as vari?veis morfol?gicas das dez esp?cies arb?reas foram avaliados: intoxica??o, sobreviv?ncia, altura das pl?ntulas, n?mero de folhas, ?rea foliar, massa seca da parte a?rea e da raiz, di?metro do caule, o volume da raiz, o ?ndice de velocidade de emerg?ncia e a emerg?ncia. Por meio de avalia??es micromorfom?tricas foram medidas, na sec??o transversal das folhas de Mabea fistulifera e Zeyheria tuberculosa, a espessura dos tecidos, a epiderme adaxial e abaxial, par?nquima pali??dico e lacunoso, al?m da l?mina total. Para a ?rea foliar foram realizadas fotografias das folhas e mensuradas com aux?lio do software Image K. As esp?cies arb?reas sobreviveram ? aplica??o do produto, com varia??o na sensibilidade. Os res?duos da mistura dos herbicidas prejudicaram a maioria das esp?cies testadas em rela??o ?s avalia??es do desenvolvimento inicial. M. fistulifera, P. gonoacantha e Z. tuberculosa apresentaram maior toler?ncia ? mistura de herbicidas. Em rela??o ? anatomia e ?rea foliar, de maneira geral, a esp?cie Z. tuberculosa foi afetada negativamente pelos herbicidas. M. fistulifera se mostrou mais tolerante ? presen?a dos contaminantes. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / The farmer must adapt to the requirements of the new brazilian environmental legislation, regarding the recovery of permanent preservation areas and legal reserve. One of the problems that the producer may face is the recovery of degraded areas, which may contain, among other contaminants, herbicide residues. 2,4-D and picloram are auxin mimicking hormonal herbicides. Among the plant groups, the species of the riparian forests have been little reported as to the effects of residues of these herbicides on the environment. Micromorphological and micromorphometric analyzes are important tools to aid in the early diagnosis of injury, since visible changes may appear in the later stages of intoxication. The objective of this work was to evaluate the initial development of ten substrate tree species with residues from of the 2,4-D + picloram herbicide mixture and to verify the effects on the anatomical modifications of Mabea fistulifera and Zeyheria tuberculosa. In a randomized block design with three replicates, 40 treatments were distributed in a 4x10 factorial scheme. The first factor was composed of four doses of the commercial mixture of 2,4-D + picloram corresponding to 0,00; 0,166; 0,336 and 0,666 g ha-1 (Tordon?, containing 240 g of 2,4-D and 64 g of picloram per liter). The second factor was composed of ten tree species: Machaerium opacum Vogel, Machaerium nyctitans (Vell.) Benth., Cassia ferruginea (Schrad.) Schrad. ex DC., Senna macranthera (DC. ex. Collad.) H.S. Irwin e Barnaby, Anadenanthera colubrina (Vell.), Brenan, Senegalia polyphylla (DC.) Britton e Rose, Piptadenia gonoacantha (Mart.) J.F. Macbr., Dalbergia villosa (Benth.) Benth., Mabea fistulifera Mart. and Zeyheria tuberculosa (Vell) Bureau ex Verl. Morphological and anatomical evaluations in young plants were performed according to the standard methodology. For the morphological variables of the ten tree species were evaluated: intoxication, survival, seedling height, number of leaves, leaf area, dry mass of shoot and root, stem diameter, root volume, emergency speed index and emergency. Through micromorphometric evaluations, tissue thickness, adaxial and abaxial epidermis, pali?adic and lacunacetic parenchyma were measured, in the cross section of the leaves of Mabea fistulifera and Zeyheria tuberculosa, in addition to the total lamina. For leaf area, leaf photographs were taken and measured using Image K software. Tree species survived the application of the product, with variation in sensitivity. Residues of the herbicide mixture adversely affected most of the tested species in relation to initial developmental assessments. M. fistulifera, P. gonoacantha and Z. tuberculosa presented greater tolerance to the herbicide mixture. In relation to the anatomy and leaf area, in general, the species Z. tuberculosa was negatively affected by the herbicides. M. fistulifera was more tolerant to the presence of contaminants.

Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-06-15T20:22:23Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_oliveira_freitas.pdf: 7617581 bytes, checksum: 5ea677ecfae2edba5d986f96ed9d8e42 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-07-18T12:06:58Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_oliveira_freitas.pdf: 7617581 bytes, checksum: 5ea677ecfae2edba5d986f96ed9d8e42 (MD5) / Made available in DSpace on 2018-07-18T12:06:58Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) mariana_oliveira_freitas.pdf: 7617581 bytes, checksum: 5ea677ecfae2edba5d986f96ed9d8e42 (MD5) Previous issue date: 2017 / Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O garimpo denominado Areinha est? inserido na bacia hidrogr?fica do Rio Jequitinhonha, bacia que se estende desde a por??o nordeste do Estado de Minas Gerais at? o sul do Estado da Bahia (foz), cujas ?guas drenam ?reas urbanas, latif?ndios, minif?ndios e ?reas de garimpos que afetam diretamente as caracter?sticas ambientais do recurso h?drico. A modifica??o das atividades de garimpo, anteriormente manuais e atualmente predominantemente mecanizadas, intensificou os impactos ambientais negativos nessa regi?o, em consequ?ncia da necessidade de remo??o de grandes quantidades de sedimentos do fundo do rio para a extra??o do diamante. Tendo em vista as particularidades naturais e as caracter?sticas antr?picas, esta pesquisa tem como objetivo geral avaliar a situa??o ambiental em que se encontra esse segmento da bacia. Dentre os objetivos espec?ficos, analisar par?metros f?sico-qu?micos de qualidade da ?gua, como temperatura, pH, turbidez, condutividade el?trica, oxig?nio dissolvido, cor aparente, s?lidos totais dissolvidos e composi??o qu?mica para os seguintes elementos: Cu, Cd, Ni, Pb, Zn, Fe e Mn. Tem tamb?m como objetivo espec?fico analisar a concentra??o, distribui??o e a prov?vel origem desses metais nas ?guas superficiais, visando associar o poss?vel risco ambiental para a sa?de humana da popula??o. O segmento do rio delimitado para estudo possui extens?o de aproximadamente 9 km, referenciado pelas coordenadas geogr?ficas -17?54'21''48 S e - 43?30'01''57 W. As an?lises realizadas neste trabalho estabeleceram que as concentra??es dos elementos Cu, Fe, Mn e Zn encontradas est?o muito acima do permitido pelo CONAMA 357/05, o que pode apresentar um risco direto ? sa?de dos garimpeiros, e indireto para a popula??o localizada ? jusante do rio, bem como para o equil?brio dos recursos naturais. Os valores dos par?metros f?sico-qu?micos cor, turbidez, condutividade el?trica e oxig?nio dissolvido est?o bem acima do preconizado pelo CONAMA 357/05, e pode ocasionar preju?zos para os organismos aqu?ticos e para flora local, e na maior disponibilidade dos elementos qu?micos identificados. Dentre as amostras coletadas, os pontos que apresentaram os maiores valores dos elementos qu?micos e par?metros f?sico-qu?micos foram aqueles que estavam localizados nas bacias de reten??o. Estes dados indicam que os rejeitos provenientes do processo de garimpagem contribuem significativamente para a contamina??o da ?rea. Estes resultados alertam para o comprometimento da qualidade da ?gua do Rio Jequitinhonha, indicando que a atividade garimpeira na ?rea de estudo exerce um risco potencial para o equil?brio dos sistemas naturais, bem como para a sa?de dos seres humanos. Dessa forma, recomenda-se que os recursos h?dricos, as ?reas no entorno do garimpo e as condi??es de uso da bacia de rejeitos sejam monitoradas periodicamente pelos ?rg?os oficiais, e que seja ainda realizado um plano de recupera??o de ?reas degradadas, uma vez que, a retirada da vegeta??o para abertura de catas e o revolvimento do solo comprometeram toda a din?mica ambiental. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Sa?de, Sociedade e Ambiente, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / The mining project called Areinha is part of the Jequitinhonha River basin, which extends from the northeastern portion of the State of Minas Gerais to the south of the State of Bahia (river mouth), whose waters drain urban areas, latifundia, minifundios and mining areas, which directly affect the environmental characteristics of the water resource. The modification of mining activities, previously manual and currently predominantly mechanized, intensified the negative environmental impacts in this region, as a result of the need to remove large amounts of sediment from the river bottom for the extraction of diamond. Taking into account the natural peculiarities and the anthropic characteristics, this research has as general objective to evaluate the environmental situation in which this segment of the basin is located. Among the specific objectives, to analyze physical and chemical parameters of water quality, such as temperature, pH, turbidity, electrical conductivity, dissolved oxygen, apparent color, total dissolved solids and chemical composition for the following elements: Cd, Cu, Fe, Mn, Ni, Pb and Zn. It also has as a specific objective to analyze the concentration, distribution and probable origin of these metals in surface waters, aiming to associate the possible environmental risk to the human health of the population. The segment of the river delimited for study has an extension of approximately 9 km, referenced by the geographical coordinates -17?54'21''48 S E; - 43?30'01''57 W. The analyzes carried out in this work established that the concentrations of Cu, Fe, Mn and Zn elements found are much higher than allowed by CONAMA 357/05, which may present a direct risk to the health of the garimpeiros, and indirect to the population located downstream of the river, as well as for the balance of natural resources. The values of the physical-chemical parameters color, turbidity, electrical conductivity and dissolved oxygen are well above that recommended by CONAMA 357/05, and can cause damages to aquatic organisms and to local flora, and to the greater availability of the identified chemical elements. Among the collected samples, the points that presented the highest values of the chemical elements and physical-chemical parameters were those that were located in the retention basins. These data represent that the wastes from the mining process contribute significantly to the contamination of the area. These results point to the impairment of water quality of the Jequitinhonha River, indicating that the garimpeira activity in the study area poses a potential risk to the balance of natural systems, as well as to human health. Therefore, it is recommended that the water resources, the areas around the garimpo and the conditions of use of the tailings basin be monitored periodically by the official agencies, and that a recovery plan for degraded areas is also carried out, since, the withdrawal of vegetation to the opening of tastings and the revolving of the soil compromised the whole environmental dynamics. / Se ha insertado el garimpo denominado Areinha en la cuenca hidrogr?fica del R?o Jequitinhonha, cuenca que se extiende desde la porci?n noreste del Estado de Minas Gerais hasta el sur del Estado de Bah?a (foz), cuyas aguas drenan ?reas urbanas, latifundios, minifundios y ?reas de garimpos que afectan directamente las caracter?sticas ambientales del recurso h?drico. La modificaci?n en las actividades de garimpo, anteriormente manuales y actualmente predominantemente mecanizadas, intensific? los impactos ambientales negativos en esa regi?n, consecuencia de la necesidad de remoci?n de grandes cantidades de sedimentos del fondo del r?o para la extracci?n del diamante. En vista de las particularidades naturales y las caracter?sticas antr?picas, esta investigaci?n tiene como objetivo general evaluar la situaci?n ambiental en que se encuentra ese segmento de la cuenca. En los objetivos espec?ficos, analizar par?metros f?sico-qu?micos de calidad del agua, como temperatura, pH, turbidez, conductividad el?ctrica, ox?geno disuelto, color aparente, s?lidos totales disueltos y composici?n qu?mica para los siguientes elementos: Cu, Cd, Fe, Mn, Ni, Pb y Zn. Tambi?n tiene como objetivo espec?fico analizar la concentraci?n, distribuci?n y el probable origen de estos metales en las aguas superficiales, con el fin de asociar el posible riesgo ambiental para la salud humana de la poblaci?n. El segmento del r?o delimitado para estudio tiene una extensi?n de aproximadamente 9 km, referenciado por las coordenadas geogr?ficas - 17?54'21''48 S e -43?30'01''57 W. Los an?lisis realizados en este trabajo establecieron que las concentraciones de los elementos Cu, Fe, Mn y Zn encontradas est?n muy por encima de lo permitido por el CONAMA 357/05, lo que puede presentar un riesgo directo a la salud de los garimpeiros, e indirecto para la poblaci?n localizada aguas abajo del r?o, as? como para el equilibrio de los recursos naturales. Los valores de los par?metros f?sico-qu?micos color, turbidez, conductividad el?ctrica y ox?geno disuelto est?n muy por encima del preconizado por el CONAMA 357/05, y puede ocasionar perjuicios para los organismos acu?ticos y flora local, y en la mayor disponibilidad de los elementos qu?micos identificados. Entre las muestras recogidas, los puntos que presentaron los mayores valores de los elementos qu?micos y par?metros f?sico-qu?micos fueron aquellos que estaban ubicados en las cuencas de retenci?n. Estos datos indican que los desechos provenientes del proceso de goteo contribuyen significativamente a la contaminaci?n del ?rea. Estos resultados alertan sobre el compromiso de la calidad del agua del R?o Jequitinhonha, indicando que la actividad minera en el ?rea de estudio ejerce un riesgo potencial para el equilibrio de los sistemas naturales, as? como para la salud de los seres humanos. De esta forma, se recomienda que los recursos h?dricos, las ?reas en el entorno del garimpo y las condiciones de uso de la cuenca de rechazos, sean monitoreadas peri?dicamente por los ?rganos los oficiales, y que se siga realizando un plan de recuperaci?n de ?reas degradadas, una vez que, la retirada de la vegetaci?n para la apertura de catas y el revolvimiento del suelo comprometieron toda la din?mica ambiental.

Made available in DSpace on 2014-12-17T14:08:52Z (GMT). No. of bitstreams: 1 RaoniBA_DISSERT.pdf: 2283831 bytes, checksum: 9e3bfc1213fc5b5ac439fb175ddc5631 (MD5) Previous issue date: 2012-12-14 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The retail fuel stations are partially or potentially polluters and generators of environmental accidents, potentially causing contamination of underground and surface water bodies, soil and air. Leaks in fuel retail stations? underground storage systems are often detected in Brazil and around the world. Monoaromatic hydrocarbons, BTEX (benzene, toluene, ethylbenzene and xylenes) and polycyclic aromatic hydrocarbons (PAHs) are an indication of the presence of contamination due to its high toxicity. This paper presents a case study of contamination in a Fuel Retail Station by petroleum derivative products in the city of Natal. For identification and quantification of the hydrocarbons, EPA analytical methods were used. The values of benzene quantified by EPA method 8021b CG-PID/FID, ranged from 1.164 to 4.503 mg.Kg-1 in soil samples, and from 12.10 to 27,639 μg.L-1 in underground water samples. Among the PAHs, naphthalene and anthracene showed the most significant results in soil samples, 0.420 to 15.46 mg.Kg-1 and 0.110 to 0,970 mg.Kg-1, respectively. In underground water samples, the results for Naphthalene varied between 0.759 and 614.7 μg.L-1. PAHs were quantified by EPA Method 8270 for GCMS. All of the results for the chemical analysis were compared with the values for the CONAMA 420/2009 resolution. The results for benzene (27,639 μg.L-1) showed levels highly above the recommended by the CONAMA 420 resolution, wherein the maximum permissible for underground water is 5 μg.L-1. This is a worrying factor, since underground water makes up 70% of the city of Natal?s water supply / The retail fuel stations are partially or potentially polluters and generators of environmental accidents, potentially causing contamination of underground and surface water bodies, soil and air. Leaks in fuel retail stations? underground storage systems are often detected in Brazil and around the world. Monoaromatic hydrocarbons, BTEX (benzene, toluene, ethylbenzene and xylenes) and polycyclic aromatic hydrocarbons (PAHs) are an indication of the presence of contamination due to its high toxicity. This paper presents a case study of contamination in a Fuel Retail Station by petroleum derivative products in the city of Natal. For identification and quantification of the hydrocarbons, EPA analytical methods were used. The values of benzene quantified by EPA method 8021b CG-PID/FID, ranged from 1.164 to 4.503 mg.Kg-1 in soil samples, and from 12.10 to 27,639 μg.L-1 in underground water samples. Among the PAHs, naphthalene and anthracene showed the most significant results in soil samples, 0.420 to 15.46 mg.Kg-1 and 0.110 to 0,970 mg.Kg-1, respectively. In underground water samples, the results for Naphthalene varied between 0.759 and 614.7 μg.L-1. PAHs were quantified by EPA Method 8270 for GCMS. All of the results for the chemical analysis were compared with the values for the CONAMA 420/2009 resolution. The results for benzene (27,639 μg.L-1) showed levels highly above the recommended by the CONAMA 420 resolution, wherein the maximum permissible for underground water is 5 μg.L-1. This is a worrying factor, since underground water makes up 70% of the city of Natal?s water supply

Made available in DSpace on 2014-12-17T15:03:22Z (GMT). No. of bitstreams: 1 JucaraRMpdf1-61.pdf: 2157479 bytes, checksum: 530d9910b960362ab6b98d5b3433665f (MD5) Previous issue date: 2009-08-19 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The Pirangi beach is located in the eastern coastline of Rio Grande do Norte state, in the municipality of Parnamirim and N?sia Floresta. In it flow into Pirangi Watershed (PW), whose water receives large amounts of pollutants, mainly domestic and industrial sewage from districts where pass the rivers that consist it, compromising, thus, the bathing water quality of the Pirangi beach. Bearing in mind the importance of water sanitary quality to ensure an environment that no present risk to the bathers s health, this work had as main objective to assess the influence of the PW s waters in the bathing water quality of the Pirangi beaches. To that end, were made collections of water in the beaches and in the rivers with the intention of quantify the fecal contamination indicators thermotolerant coliforms and enterococci, to then classify the conditions of bathing water quality according with the CONAMA Resolution number 274 of 2000. For the purposes greater knowledge about the health conditions of the Beaches Pirangi and about the influence the PW s waters exert on it, was done parallely to the study of the water quality, an investigation of the sand sanitary quality. Furthermore, it was made an evaluation of the PW s Water Quality through Water Quality Index (WQI). Starting from the results obtained in the research present was possible to verify, among other aspects, that the entry of the PW s waters in the Pirangi beaches exerts direct influence in the bathing water quality of the same ones, being the North Pirangi beach (point tracking PA-02) the most influenced. There was noticed also a significant reduction in the conditions of bathing water quality of the beaches in the rainy season. However, the precariousness do sewerage system of the Natal metropolitan region and the absence of a right system of treatment an final disposal of domestic sewage and industrial are the main factors responsi le for deterioration of the PW s Water Quality, and as a consequence, compromising the bathing water quality of the Pirangi beaches / A praia de Pirangi est? localizada no litoral oriental do Estado do Rio Grande do Norte, nos munic?pios de Parnamirim e N?sia Floresta. Nela des?gua a Bacia Hidrogr?fica Pirangi (BHP), cuja ?gua recebe grande quantidade de poluentes, principalmente esgotos dom?sticos e industriais dos munic?pios por onde passam os rios que a comp?em, comprometendo, dessa forma, a balneabilidade desta praia. Tendo em vista a import?ncia da qualidade sanit?ria da ?gua para se garantir um ambiente que n?o apresente riscos ? sa?de dos banhistas, o presente trabalho teve como objetivo principal avaliar a influ?ncia das ?guas da BHP na balneabilidade das praias de Pirangi. Para tanto, foram realizadas coletas de ?gua nas praias e nos rios com o intuito de quantificar os indicadores de contamina??o fecal Enterococos e Coliformes termotolerantes, para ent?o classificar as condi??es de balneabilidade de acordo com a resolu??o CONAMA n? 274 de 2000. Para efeito de maior embasamento sobre as condi??es sanit?rias das Praias de Pirangi e sobre a influ?ncia que as ?guas da BPH exercem sobre elas, foi realizada, paralelamente ao estudo da qualidade das ?guas, uma investiga??o da qualidade sanit?ria das areias. Al?m disso, foi feita uma avalia??o da qualidade da ?gua da BHP atrav?s do ?ndice de Qualidade da ?gua (IQA). A partir dos resultados obtidos na presente pesquisa foi poss?vel constatar, dentre outros aspectos, que a entrada das ?guas da BHP nas praias de Pirangi exerce influ?ncia direta na balneabilidade das mesmas, sendo a praia de Pirangi do Norte (ponto de monitoramento PA-02) a mais influenciada. Observou-se, tamb?m, redu??o significativa nas condi??es de balneabilidade das praias na esta??o chuvosa. Contudo, a precariedade do esgotamento sanit?rio da regi?o metropolitana de Natal e a aus?ncia de um sistema adequado de tratamento e disposi??o final dos esgotos dom sticos e industriais s?o os principais fatores respons?veis pela degrada??o da qualidade da ?gua da BHP, e como conseq??ncia, pelo comprometimento da balneabilidade das praias de Pirangi

Made available in DSpace on 2014-12-17T15:34:47Z (GMT). No. of bitstreams: 1 AlbertoLFAJ_DISSERT.pdf: 1671046 bytes, checksum: 8699a01f6b8beb7c7731350f466df41d (MD5) Previous issue date: 2013-04-10 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The control of gastrointestinal nematodes of small ruminants is usually done with anthelmintics. However, due to the emergence of ever-increasing parasite resistance to these drugs, looking up an alternative control parasites. One of this is sought in pasture management, as these are the sources of animals` infection by L3 infective larvae of helminths. The aim of this study was to evaluate the performance of sheep to natural infections by gastrointestinal nematodes grazing Panicum maximum cv. Massai and cv. Aruana, and Brachiaria brizantha cv. Piat? and cv. Marandu. The work was conducted from May to August-2011 with 48 male sheeps SRD versus Santa In?s breed. The animals were naturally infected with gastrointestinal nematodes, and maintained in four different cultivars of tropical forage grasses, naturally contaminated with eggs and larvae of gastrointestinal nematodes. Each week the animals were phenotypically characterized by parasitological examinations (eggs per gram of feces - EPG, and feces culture), hematological (packed cell volume PCV, and blood eosinophil count) method to evaluate the Famacha? colorof ocular mucosa, and the measures of body condition score and weight. In pastures was made the recovery of infective larvae in order to determine the quantity of L3 present in the pasture. The experimental design was a randomized completed block with two replications and before the entry of animals in the paddocks, they have been wormed. The experiment was ended when the animals reached 32.0 kg liveweight, and then were slaughtered and autopsies performed for the recovery and identify parasites of the abomasum, small intestine and large intestine. Results were subjected to analysis of variance, t test and Tukey`s test. The animals kept on pastures of Marandu grass had lower EPG counts, higher percentage of packed cell volume and higher average weight; those who remained in the Piat? pasture had lower eosinophil counts per microliter of blood. About the Famacha?, the highest prevalence was Famacha 2, and the body condition score ranged between 2 and 3. The results of feces cultures and recovery of larvae on pastures showed the presence of larvae of Trichostrongylus sp., and at the necropsy too. This way, it was concluded that the grass cultivars influences the sheep parasite load; the Famacha, together with EPG and packed cell volume are important indicators for use in controlling gastrointestinal nematode infections. The Trichostrongylus sp. was the most prevalent parasite in sheep during the rainy season / O controle dos nematoides gastrintestinais de pequenos ruminantes usualmente ? feito pela administra??o de anti-helm?nticos. Por?m, devido ao aparecimento cada vez mais crescente da resist?ncia parasit?ria a estas drogas, busca-se um controle alternativo e eficaz para as parasitoses. Uma das alternativas est? no manejo das pastagens, j? que estas s?o as fontes de infec??o dos animais pelas larvas infectantes L3 dos helmintos. Assim, o objetivo deste trabalho foi avaliar o desempenho de ovinos frente ?s infec??es naturais por nematoides gastrintestinais mantidos em pastagens de Panicum maximum cv. Massai e cv. Aruana, e Brachiaria brizantha cv. Piat? e cv. Marandu. O experimento foi realizado de Maio a Agosto/2011, com 48 ovinos machos, mesti?os SRD x Santa In?s, naturalmente infectados por nematoides gastrintestinais e mantidos em quatro diferentes cultivares de gram?neas forrageiras tropicais naturalmente contaminadas por ovos e larvas de nematoides gastrintestinais. Semanalmente, os animais foram caracterizados fenotipicamente atrav?s de exames parasitol?gicos (ovos por grama de fezes OPG e coprocultura), exames hematol?gicos (volume globular VG, e contagem de eosin?filos sangu?neos), pelo m?todo Famacha? para avaliar a colora??o da mucosa ocular, e pelas medidas de escore de condi??o corporal e ganho de peso. Nas pastagens foi feita a recupera??o das larvas infectantes, a fim de determinar a quantidade de L3 presentes no pasto. O delineamento experimental usado foi o de blocos casualizados com duas repeti??es, e antes da entrada dos animais nos piquetes, os mesmos foram vermifugados. O per?odo experimental foi finalizado quando os animais atingiram 32,0 kg de peso vivo, e em seguida foram abatidos e realizada a necr?psia para recupera??o e identifica??o dos parasitos do abomaso, intestino delgado e intestino grosso. Os resultados obtidos foram submetidos a an?lise de vari?ncia, teste t e teste de Tukey. Os animais mantidos nas pastagens de capim Marandu apresentaram menores contagens de OPG, maior porcentagem de volume globular e maior m?dia de peso; os que permaneceram na pastagem Piat? apresentaram menores contagens de eosin?filos por microlitro de sangue. O Famacha de maior preval?ncia foi o Famacha 2 e o escore de condi??o corporal oscilou entre os ?ndices 2 e 3. Os resultados das coproculturas e a recupera??o das larvas nas pastagens evidenciou presen?a de larvas de Trichostrongylus sp., bem como na necropsia este tamb?m foi o parasito de maior preval?ncia. Portanto, pode-se concluir que a cultivar forrageira influencia na carga parasit?ria dos ovinos; o Famacha, juntamente com o OPG e VG constituem indicadores importantes para serem utilizados no controle das verminoses gastrintestinais; o Trichostrongylus sp. foi o parasito de maior preval?ncia nos ovinos no per?odo chuvoso

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-20T22:47:57Z No. of bitstreams: 1 AryaneLeonidioDoCarmoAssuncao_DISSERT.pdf: 6383259 bytes, checksum: 56d6226f2aa40df6803e5e997583ffab (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-24T19:48:01Z (GMT) No. of bitstreams: 1 AryaneLeonidioDoCarmoAssuncao_DISSERT.pdf: 6383259 bytes, checksum: 56d6226f2aa40df6803e5e997583ffab (MD5) / Made available in DSpace on 2017-02-24T19:48:01Z (GMT). No. of bitstreams: 1 AryaneLeonidioDoCarmoAssuncao_DISSERT.pdf: 6383259 bytes, checksum: 56d6226f2aa40df6803e5e997583ffab (MD5) Previous issue date: 2016-08-29 / A ?rea de estudo est? inserida na bacia hidrogr?fica do rio Pirangi, localizada no litoral Oriental do Estado do Rio Grande do Norte, e abrangendo 370 km? na regi?o do munic?pio de Parnamirim. Essa ?rea apresenta um alto potencial hidrogeol?gico, cujos recursos h?dricos j? vem sendo bastante explotados no decorrer dos anos. O objetivo principal do trabalho, tendo em vista a import?ncia e crescente utiliza??o desse recurso, ? caracterizar a qualidade dessas ?guas subterr?neas e diagnosticar modifica??es hidroqu?micas ocorridas a partir do desenvolvimento de atividades urbanas e agr?colas na regi?o. Nesse sentido, foi desenvolvida inicialmente uma avalia??o de uso e ocupa??o do solo em toda a ?rea, identificando as atividades existentes e que possam influenciar na contamina??o das ?guas. A partir dessas caracter?sticas dividiu-se a ?rea de estudo em tr?s sub?reas, de modo a comparar a situa??o hidroqu?micas das ?guas entre elas. Para o reconhecimento hidrogeoqu?mico, a partir de rede de monitoramento definida, foram realizadas visitas de campo para coleta de amostras para an?lise qu?mica, a fim de interpretar a situa??o do Sistema Aqu?fero Dunas-Barreiras. Com isso, obtiveram-se dados de condutividade el?trica, STD, c?tions principais (s?dio, c?lcio, magn?sio e pot?ssio), ?nions principais (cloreto, sulfato e bicarbonato), ferro, pot?ssio, carbonato, nitrato, am?nia, boro, pH, e dureza total; interpretou-se os resultados das an?lises atrav?s de m?todos estat?sticos, mapas hidroqu?micos e diagramas de Piper e Durov Expandido; e foi realizado um estudo de qualidade das ?guas subterr?neas para determinados usos. A f?cies hidroqu?mica que predomina na ?rea de estudo foi reconhecida como cloretada s?dica. Os resultados obtidos indicam que as ?guas subterr?neas apresentam, em geral, uma boa qualidade, com baixa salinidade. Contudo, identifica-se uma tend?ncia ? contamina??o oriunda da por??o norte da ?rea, mais pr?xima ao centro do munic?pio de Parnamirim, e que vem passando por processos de expans?o urbana nos ?ltimos anos. Ocorre tamb?m essa tend?ncia nas por??es em que h? cultivo de lavouras e pecu?ria, a oeste da ?rea. A por??o leste da ?rea, sub?rea que engloba sistemas de lagoas e dunas, ? a que possui as ?guas subterr?neas com menores salinidades e, consequentemente, qualidade mais preservada. Essas constata??es indicam que a dire??o de diminui??o de salinidade das ?guas (em dire??o a leste) segue a dire??o do fluxo subterr?neo. / The study area is inserted in the hydrographic basin of Pirangi river, located in the west coast of Rio Grande do Norte state, covering 370 km? in the Parnamirim region. The area presents a high hydrogeological potential, whose water resources has been widely exploited over the years. The main objective of this dissertation, considering the importance and increasing use of this resource, is characterize the groundwater quality and diagnose hydrochemical changes due the urban development and agriculture in the region. In this sense, it was initially made an assessment of use and land occupation in the whole area, identifying existing activities and the might influence water contamination. Based on these characteristics, the study area was divided in three subareas, to compare the hydrochemical situation between them. For the hydrogeochemical recognition in the defined monitoring network, it was performed field work to collect samples for chemical analysis, in order to interpret the situation of the Dunas-Barreiras Aquifer System. Therewith, many measurements were obtained such as electrical conductivity, total dissolved solids, major cations (sodium, calcium and magnesium), major anions (chloride, sulfate and bicarbonate), iron, potassium, carbonate, nitrate, ammonia, boron, pH, and total hardness; the analysis results were interpreted using statistical methods, hydrochemical maps and Piper and Expanded Durov diagrams; and a study of groundwater quality was conducted for certain uses. The hydrochemical facies that prevails in the study area is sodium chlorinated. The results indicate that the groundwater have generally good quality with low salinity. However, there is a tendency to contamination originating from the northern part of the area, closer to the center of Parnamirim city, which has been undergoing urban expansion processes in the last years. The same tendency is seen in the portions which are agricultural crops and livestock, in the western area. The east portion of the area, subarea which comprises ponds and dunes systems, is the one with lower salinity levels and, therefore, more preserved quality. These findings indicate that the direction in the decreasing of water salinity (towards east) follows the direction of the groundwater flow.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-05-31T19:25:07Z No. of bitstreams: 1 2012 - Antonia Gomes do Nascimento.pdf: 1998725 bytes, checksum: fbd800fbafb45198f42632b3aca1a0f0 (MD5) / Made available in DSpace on 2017-05-31T19:25:07Z (GMT). No. of bitstreams: 1 2012 - Antonia Gomes do Nascimento.pdf: 1998725 bytes, checksum: fbd800fbafb45198f42632b3aca1a0f0 (MD5) Previous issue date: 2012-06-27 / The present work has been developed in the municipal school Jos? Arcanjo de Deus e Silva, in the city Z? Doca-MA, with the aim of orienting the responsibles for the school nourishment about safe food and good practices of manipulation. Initially, a checklist has been applied to verify the conditions of the physical and operational structure of the canteen, with the objective of characterizing and verifying if the collaborators followed the current legislation. After that, samples of swabs have been collected on the manipulator?s hands and tools, for verifying the presence of microorganisms before and after the training. It?s been applied a half-structured questionnaire to the manipulators for obtaining informations about the scholar environment, and in addition interviews have been made with the directors of the morning and afternoon shifts. After the checklist application, some nonconformities have been identified, for which alterations have been suggested to facilitate the adequation process. It has been observed, however, that the manipulators didn?t have the knowledge about the good practices that must be adopted for obtaining a safe food and with quality, as the importance of using caps and aprons, the periodic development of laboratorial exams and the need of promoting a correct hands and food hygienization. During the activities, significants differences have been verified on the physical and operational structure, specially on the manipulators? behavior. The results of this work have demonstrated that the hygienic-sanitary school conditions are unsatisfactory, but the mobilization was effective and the hands and tool hygienization process was adequate. As a final result, a Manipulation Good Practices Manual was developed. / O presente trabalho foi realizado na escola Municipal Jos? Arcanjo de Deus e Silva, na cidade de Z? Doca-MA, com o intuito de orientar os respons?veis pela execu??o da alimenta??o escolar sobre alimento seguro e boas pr?ticas de manipula??o. Inicialmente, foi aplicado um checklist para verificar as condi??es da estrutura f?sica e operacional da cantina, cuja finalidade seria caracterizar e verificar se os colaboradores seguiam a legisla??o vigente. Em seguida, foram realizadas coletas de swabs nas m?os dos manipuladores e nos utens?lios, para verifica??o da presen?a de microrganismos antes e depois do treinamento realizado. Foi aplicado um question?rio semi-estruturado com os manipuladores para obten??o de informa??es sobre o ambiente escolar, al?m de entrevistas com os diretores dos turnos matutino e vespertino. Ap?s a aplica??o do checklist foram identificadas algumas n?o conformidades, para as quais foram sugeridas altera??es para facilitar o processo de adequa??o. Observou-se, no entanto, que os manipuladores desconheciam as boas pr?ticas que devem ser adotadas para a obten??o de um alimento seguro e de qualidade, tais como, a import?ncia da utiliza??o de toucas e aventais, a realiza??o peri?dica de exames laboratoriais e a necessidade de se promover uma higieniza??o correta das m?os e dos alimentos. Ao longo das atividades, verificou-se diferen?as significativas na estrutura f?sica e operacional, principalmente na postura dos manipuladores. Os resultados deste trabalho demonstraram que as condi??es higi?nico-sanit?rias da escola s?o insatisfat?rias, mas a sensibiliza??o foi eficaz e houve adequa??o no processo de higieniza??o das m?os e utens?lios. Como resultado final foi elaborado um Manual de Boas Pr?ticas de Manipula??o.

Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2017-06-05T13:02:46Z No. of bitstreams: 1 2007 - Ana Paula Carvalho Magalh?es.pdf: 895321 bytes, checksum: 5c79ed9139248935b594927ccbd21bb4 (MD5) / Made available in DSpace on 2017-06-05T13:02:47Z (GMT). No. of bitstreams: 1 2007 - Ana Paula Carvalho Magalh?es.pdf: 895321 bytes, checksum: 5c79ed9139248935b594927ccbd21bb4 (MD5) Previous issue date: 2007-09-27 / The aim of this work was evaluate the internal and external quality of table eggs (unfertile) with or without microfissures, packed in conventional cardboard pulps or with plastic films (PVC), and stored for one or 14 days. Were used 160 white table eggs of Light Layers (Hy line-W36), collected in four different periods. Each fifteen days, 40 eggs from the same portion, separated by weight (between 52 and 58 grams), and selected according with the shell integrity, were classified as fissured or not fissured, by macroscopic visualization (twenty eggs per category). The evaluations that the present work handles, were carried out in the 1st and in the 14th day, after the laying, respectively. The experimental design was randomized blocks, with factorial arrangement (2x2x 2). The variables studied were: Haugh Unit (UH), yolk index (YI), albumen index (AI), Yolk pH (YpH), pH albumen (pHA), fungus incidence (FI), shell percentage (SP), shell thickness (ST) and air chamber (AC). There was effect (P<0.05) of the shell integrity on the SP and FI. Was observed an increase (P<0.05) in the SP to the eggs without fissure when compares to those with fissures, probably because of the higher water loss, promoted by the fissures. For the results of FI it was seen that there was a decrease (P<0.05) on fungus values to the eggs without shell fissure in relation to the fissured eggs. It was observed effect (P<0.05) of the packaging type on the variables UH and TS, with higher results seen in these variables when eggs were revested by PVC film. The time storage influenced (P<0.05) the UH, AC, YpH, ApH, YI and AI. Presenting higher results for (UG, YI and AI), and lower results for (AC, YpH, ApH) in the first day of storage.There was interaction of the packaging type time X of storage, when the eggs aconditionated in open packaging for 14th days presented higher values for fungus incidence, due to environment exposition and excess of humidity, allowing proliferation of these microorganisms. / Um experimento foi conduzido com o objetivo de se avaliar a qualidade interna e externa de ovos de mesa ?ntegros de casca ou com microfissuras, em embalagens convencionais de polpas de papel?o ou cobertos com filmes pl?sticos (PVC), armazenados por um ou 14 dias. Foram utilizados 160 ovos de mesa (inf?rteis) brancos, de poedeiras da linhagem Hy line- W36, coletados em 4 ?pocas diferentes. Quinzenalmente 40 ovos, provenientes sempre do mesmo lote foram separados por peso (entre 52 e 58 gramas ) para comporem os diversos tratamentos em igualdade de peso, no conjunto. Vinte desses ovos foram selecionados tamb?m de acordo com a integridade da casca, classificados como fissurados, por visualiza??o macrosc?pica e os restantes constitu?dos de casca integra. De cada uma dessas categorias descritas acima, 10 ovos foram acondicionados em embalagens de polpa de papel?o revestida por filme pl?stico (PVC) e os outros 10 no mesmo tipo de embalagem por?m sem filme de cobertura. As avalia??es de que trata o objetivo do presente trabalho, foram realizadas no 1? e no 14? dia ap?s a postura, respectivamente, com metade dos ovos de cada uma das embalagens citadas.O delineamento utilizado foi em blocos casualizados em esquema fatorial (2x2x2): 2 tipos de integridade de casca x 2 tipos de embalagens x 2 per?odos de armazenamento com 4 repeti??es cada um. As vari?veis estudadas foram: Unidade Haugh (UH), indice de gema (IG), indice de alb?mem (IA), pH gema (pHG), pH alb?mem (pHA), incid?ncia de fungos (IC), porcentagem de casca (PC), espessura de casca (EC) e tamanho da c?mara de ar (CA). Foi observado efeito significativo (P<0,05) da integridade da casca sobre as vari?veis PC e IC. Houve aumento significativo (P<0,05) na PC dos ovos sem fissura em rela??o aos ovos com fissuras, provavelmente decorrente da maior perda de ?gua, promovida pelas fissuras. Para os valores de IC, observou-se que houve decr?scimo de fungos na casca dos ovos sem fissura em rela??o aos ovos fissurados. Foi observado efeito (P<0,05) do tipo de embalagem sobre as vari?veis UH e EC, com maiores valores observados nessa variaveis quando revestidas por filme de PVC. P?de ser observado tamb?m, efeito (P<0,05) do tempo de armazenamento sobre as vari?veis UH, CA, pHG, pHA, IG e IA. Apresentando maiores valores para (UH, IG e IA) e menores valores para (CA, pHG e pHA) no 1? dia de armazenamento. Houve intera??o do tipo de embalagem X tempo de armazenamento, quando nos ovos acondicionados por 14 dias e embalagem aberta apresentaram maior contamina??o de fungos devido sua exposi??o ao ambiente e ao excesso de umidade, permitindo assim uma maior prolifera??o desses microoganismos.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-08-04T15:33:18Z No. of bitstreams: 1 2009 - Fl?vio Guerra Barroso.pdf: 2034037 bytes, checksum: 1635fb4534d6b8f1c27887b03f88ac56 (MD5) / Made available in DSpace on 2017-08-04T15:33:18Z (GMT). No. of bitstreams: 1 2009 - Fl?vio Guerra Barroso.pdf: 2034037 bytes, checksum: 1635fb4534d6b8f1c27887b03f88ac56 (MD5) Previous issue date: 2009-08-27 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico. CNPQ / The biological contamination by invasive alien species is considered one of the greatest threats to biodiversity worldwide. However, in Brazil the information on this subject are still scarce, especially regarding the occurrence, distribution and influence of alien species on native communities, mainly in protected areas. The objective of this study was to identify exotic plant species present in the intensive use zone of Serra dos ?rg?os National Park and determine their occurrence, distribution and influence on the native plant community. The study area is located in Teres?polis and concentrates on the barragem road, which cuts across the zone of intensive use. To determine the occurrence of exotic plant species were allocated, randomly, 30 plots of 10 x 10 m along the road, located at different distances in edge-interior gradient of forest in order to identify the penetration and distribution of these species in the forest. Individuals with circumference at breast height (cbh) above 8 cm were included in the sample. To characterize plant community, phytosociological parameters were calculated as basal area, density, frequency, dominance and rates of coverage and importance. For the herbaceous layer, sub-plots of 5 x 5 m plots were installed within the existing plots, and those sampled by the method of points. We found 1,274 individuals of shrub-tree layer, distributed in 53 families, and 362 individuals of the herbaceous layer, distributed in 15 families. Only two exotic species were sampled: Impatiens walleriana Hook. f. e Hedychium coronarium J. K?nig, both herbaceous. These species were restricted to plots of class A, with penetration less than 10 meters. Its distribution is aggregated and, in the plots, they were found only in low densities, but with high frequency, suggesting behavior of weeds. The presence of these species have no influence on the tree-shrub layer but in the herbaceous layer, values of richness and abundance showed a negative correlation in the presence of these exotic species. / A contamina??o biol?gica por esp?cies ex?ticas invasoras ? considerada uma das maiores amea?as ? biodiversidade mundial. No entanto, no Brasil as informa??es sobre este assunto ainda s?o escassas, principalmente em rela??o ? ocorr?ncia, distribui??o e influ?ncia de esp?cies ex?ticas sobre as comunidades nativas, especialmente em ?reas protegidas. O objetivo deste estudo foi identificar as esp?cies vegetais ex?ticas presentes em um trecho da zona de uso intensivo do Parque Nacional da Serra dos ?rg?os e determinar sua ocorr?ncia, distribui??o e influ?ncia sobre a comunidade vegetal nativa. A ?rea de estudo localiza-se na sede Teres?polis do parque e concentra-se na estrada da barragem, que corta toda a zona de uso intensivo. Para determinar a ocorr?ncia de esp?cies vegetais ex?ticas foram alocadas 30 parcelas de 10 x 10 m ao longo da estrada, situadas a diferentes dist?ncias no gradiente borda-interior de mata a fim de identificar a penetrabilidade e distribui??o dessas esp?cies na floresta. Indiv?duos arb?reos com CAP igual ou superior a 8 cm foram inclu?dos na amostragem. Para caracterizar comunidade vegetal foram calculados par?metros fitossociol?gicos como ?rea basal, densidade, freq??ncia, domin?ncia absolutas e relativas e os ?ndices de cobertura e import?ncia. Para o estrato herb?ceo, sub-parcelas de 5 x 5 m foram alocadas dentro das parcelas j? existentes, e os indiv?duos foram amostrados atrav?s do m?todo de pontos. Foram encontrados 1.274 indiv?duos do estrado arbustivo-arb?reo, distribu?dos em 53 fam?lias, e 362 indiv?duos do estrato herb?ceo, distribu?dos em 15 fam?lias. Apenas duas esp?cies ex?ticas foram amostradas: Impatiens walleriana Hook. f. e Hedychium coronarium J. K?nig, ambas herb?ceas. Essas esp?cies estavam restritas as parcelas da classe A, com penetrabilidade inferior a 10 metros. Sua distribui??o ? agregada e, nas parcelas, elas foram encontradas somente em baixas densidades, por?m com alta freq??ncia, sugerindo um comportamento invasor. A presen?a dessas esp?cies parece n?o exercer influ?ncia sobre o estrato arbustivo-arb?reo por?m, no estrato herb?ceo, valores de riqueza e abund?ncia apresentam uma correla??o negativa quanto a presen?a dessas esp?cies ex?ticas.

Made available in DSpace on 2014-12-17T14:08:31Z (GMT). No. of bitstreams: 1 LucianaAN.pdf: 2077489 bytes, checksum: 1da1ee4e46ae44cfe82f45be75eac385 (MD5) Previous issue date: 2008-09-19 / It is located in an area of increasing oil exploration, the region of the Lower A?u is at the mercy of a possible pollution generated by this economic activity, which includes various chemical substances harmful to health, such as metals. This thesis aims to, diagnose the areas of River Piranhas-A?u, a region of the Lower A?u, which are polluted by traces factors and more. In this study, it was determined the concentration of the chemica elements Al, CD, Cr, Cu, Fe, Mn, Ni, P, Pb, V and Zn, through the technique of ICP-OES analysis and the size of sediments and their contents organic matter. Were mapped by GPS, 12 points from collections. The interpretations of the results, together associating that allowed pollution to a possible contamination by oil activity. The results showed tha some regions have low concentrations of cadmium, lead, copper, manganese and zinc unable to promote damage to human health. However, there are places where the concentrations of certain metals chromium, iron and zinc are moderately polluted compared to the results with the reference values of literature and others that are highly polluted by iron. However, due to a greater number of wells in production in those locations, those higher concentrations, it can be suggested a possible influence of oi production in some areas with concentrations of chromium and lead are higher than the rest of the points of monitoring. Moreover, it is observed that the highest levels of metals found in sediment of finer texture and more organic matter content / Por estar situada em uma ?rea de crescente explora??o petrol?fera, a regi?o do Baixo A?u encontra-se ? merc? de uma poss?vel polui??o gerada por esta atividade econ?mica, que inclui diversas subst?ncias qu?micas prejudiciais ? sa?de, tais como os metais. Esta disserta??o tem como objetivo, diagnosticar as ?reas do Rio Piranhas-A?u, regi?o do Baixo A?u, que se encontram polu?das por elementos maiores e tra?os. Neste estudo, determinou-se a concentra??o dos elementos qu?micos Al, Cd, Cr, Cu, Fe, Mn, Ni, P, Pb, V e Zn, atrav?s da t?cnica de ICP-OES e das an?lises granulom?tricas dos sedimentos e seus respectivos teores de mat?ria org?nica. Foram mapeados por GPS, 12 pontos de coletas. As interpreta??es dos resultados, em conjunto, possibilitaram associar essa polui??o a uma poss?vel contamina??o pela atividade petrol?fera. Os resultados mostraram algumas regi?es que apresentam baixas concentra??es de c?dmio, chumbo, cobre, mangan?s e zinco, incapazes de promover preju?zos ? sa?de humana. No entanto, h? localidades nas quais as concentra??es determinadas dos metais cromo, ferro e zinco s?o moderadamente polu?das, comparando-se esses resultados com valores de refer?ncia da literatura e outras que s?o altamente polu?das por ferro. No entanto, devido a uma maior quantidade de po?os em produ??o nessas localidades, essas maiores concentra??es, pode-se inferir uma poss?vel influ?ncia da produ??o de petr?leo em algumas ?reas cujas concentra??es de cromo e chumbo s?o mais elevadas que o restante dos pontos de monitoramento. Al?m disso, observa-se que os maiores teores de metais ocorrem em sedimento de textura mais fina e com maior teor de mat?ria org?nica