Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-04-11T19:47:35Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) igor_santos_alves.pdf: 1062838 bytes, checksum: 994f685f132399428b3bdee33d25461e (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-04-24T17:18:46Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) igor_santos_alves.pdf: 1062838 bytes, checksum: 994f685f132399428b3bdee33d25461e (MD5) / Made available in DSpace on 2017-04-24T17:18:46Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) igor_santos_alves.pdf: 1062838 bytes, checksum: 994f685f132399428b3bdee33d25461e (MD5) Previous issue date: 2016 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A import?ncia da exist?ncia de m?todos adequados de quantifica??o de metais pesados, para a avalia??o dos teores nos solos deve ter melhor correla??o com o absorvido pelas plantas. Os objetivos deste estudo foram avaliar a disponibilidade e taxa transfer?ncia de Cd, Pb e Ni em solos contaminados; avaliar a efici?ncia dos extratores Mehlich-1, DTPA pH 7,3, Mehlich-3 e ?gua r?gia e; a correla??o entre os teores de Cd, Pb e Ni extra?dos pelos extratores e os teores na planta de milho. Os experimentos foram conduzidos em casa de vegeta??o em Diamantina MG. Os experimentos foram realizados no delineamento inteiramente casualizado no esquema fatorial 4 x 3, sendo quatro n?veis de cada metal: Cd 0, 2, 4 e 12 mg kg-1, Pb 0, 45, 90 e 270 mg kg-1 e Ni 0, 20, 40, 120 mg kg-1 e tr?s tipos de solos que foram classificados como Neossolo Quartzar?nico ?rtico t?pico (NQ), Latossolo Vermelho-Amarelo distr?fico (LVAd) e Latossolo Vermelho distr?fico (LVd) com tr?s repeti??es. O milho foi utilizado como planta indicadora. Determinaram-se a massa seca e os teores de Cd, Pb e Ni na parte a?rea e ra?zes das plantas de milho. Para aferi??o do teor de Cd, Pb e Ni no solo foram utilizados os extratores Mehlich 1, DTPA pH 7,3, Mehlich-3 e ?gua r?gia. Nos tr?s experimentos, houve maior disponibilidade dos metais no NQ em rela??o aos latossolos (LVAd e LVd), sendo o NQ onde houve maior concentra??o nas partes das plantas de milho. No experimento de Cd e Ni, nos tr?s solos, a parte a?rea apresentou maior crescimento relativo que as ra?zes. J? no experimento de Pb, devido a menor mobilidade deste metal na planta em compara??o ao Cd e Ni, houve maior concentra??o de Pb nas ra?zes que na parte a?rea. Os maiores teores tanto de Cd, quanto Pb e Ni na parte a?rea e ra?zes ocorreram no NQ, sendo o solo onde ocorreu maior transloca??o dos tr?s metais para a parte a?rea. Nos tr?s experimentos, os extratores utilizados tiveram boa correla??o com os teores absorvidos pelas plantas e as extra??es por DTPA pH 7,3 apresentaram melhor correla??o com os teores de Cd e Pb tanto nas ra?zes quanto na parte a?rea. Com rela??o ao Ni, os extratores Mehlich-1 e ?gua r?gia foram os que apresentaram maior correla??o com os teores absorvidos pelas plantas. Os metais pesados Cd, Ni e Pb apresentam maior mobilidade em solos com baixo teor de argila, podendo ser mais facilmente absorvido pelas plantas. O crescimento das plantas pode influenciar a toxidez por metais, de modo que, quanto maior o crescimento menor o efeito t?xico do metal, como verificado nos tr?s experimentos. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / The importance of the existence of adequate methods of quantification of heavy metals for the evaluation of soil concentrations should have a better correlation with that absorbed by the plants. The objectives of this study were to evaluate the Cd, Pb and Ni availability and transfer rate in contaminated soils, to evaluate the efficiency of the extractors Mehlich-1, DTPA pH 7.3, Mehlich-3 and, aqua regia and, the correlation between the Cd, Pb and Ni concentrations extracted by the extractors and the concentrations in the corn plant. The experiments were conducted in a greenhouse in Diamantina, Minas Gerais State, Brazil. The experiments were carried out in a completely randomized design in the 4 x 3 factorial scheme, with four rates of each metal: Cd 0, 2, 4 and 12 mg kg-1, Pb 0, 45, 90 and 270 mg kg-1 and Ni 0, 20, 40, 120 mg kg-1, and three soil types that were classified as Typic Quartzipsamment (TQ), Xantic Hapludox (XH) and Rhodic Hapludox (RH) with three replicates. Corn was used as the indicator plant. The dry mass and the Cd, Pb and Ni concentrations were determined in the shoot and roots of corn plants. The Mehlich 1, DTPA pH 7.3, Mehlich-3 and aqua regia extractors were used to measure the Cd, Pb and Ni concentrations in the soil. In three experiments, a greater availability of metals in TQ regarding latosols (XH and RH), the TQ where there was a higher concentration in parts of corn plants. In the experiment of Cd and Ni in the three soils, the shoots had higher relative growth than the roots. In the Pb experiment, due to the lower mobility of this metal in the plant compared to Cd and Ni, a higher Pb concentration in roots than in shoots. The highest concentrations both of Cd, Pb and Ni as in shoots and roots occurred in TQ, and the soil where higher translocation of the three metals to shoots. In three experiments, the extractors used correlated well with the concentrations absorbed by plants and extractions by DTPA pH 7.3 showed better correlation with Cd and Pb concentration in the roots and shoots. With respect to Ni, the Mehlich-1 extractor and aqua regia showed the highest correlation with the concentrations absorbed by plants. Heavy metals Cd, Ni and Pb have greater mobility in soils with low clay content, and can be more easily absorbed by plants. Plant growth can influence the toxicity of heavy metals, so that the higher the lower the toxic effect growth of the metal, as seen in the three experiments.

Made available in DSpace on 2014-12-17T14:09:17Z (GMT). No. of bitstreams: 1 AdrianaMSR_TESE.pdf: 15407461 bytes, checksum: 9724571238317c177c2fdb4b02772cad (MD5) Previous issue date: 2013-05-06 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Activities that have fuel subterranean storage system are considered potentially polluting fuels by CONAMA Resolution 273, due to the possibility of leak, outpouring and overflow of fuel into the ground. Being even more worrying when contaminate groundwater for public supply, as the case of Natal City. For this reason, the Public Ministry/RN, in partnership with UFRN, developed the project environmental suitability of Gas stations in Natal, of which 36% showed evidence of contamination. This paper describes the four stages of the management of contaminated areas: preliminary assessment of environmental liabilities, detailed confirmatory investigation of the contamination, risk analysis to human health (RBCA), as well as the remediation plan of degraded areas. Therefore it is presented a case study. For the area investigated has been proposed a mathematical method to estimate the volume of LNAPL by a free CAD software (ScketchUp) and compare it with the partition method for grid area. Were also performed 3D graphics designs of feathers contamination. Research results showed that passive benzene contamination in groundwater was 2791.77 ?g/L, when the maximum allowed by CONAMA Resolution 420 is 5 ?g/L which is the potability standards. The individual and cumulative risks were calculated from 4.4 x10-3, both above the limits of 1.0 x10-5 or by RBCA 1.0 x10-6 by the Public Ministry/RN. Corrective action points that remediation of dissolved phase benzene is expected to reach a concentration of 25 ?g/L, based on carcinogenic risk for ingestion of groundwater by residents residential, diverging legislation. According to the proposed model, the volume of LNAPL using the ScketchUp was 17.59 m3, while by the grid partitioning method was 14.02 m3. Because of the low recovery, the expected removal of LNAPL is 11 years, if the multiphase extraction system installed in the enterprise is not optimized / Atividades que possuem sistema de armazenamento subterr?neo de combust?veis s?o consideradas potencialmente poluidoras pela Resolu??o CONAMA 273/2000, devido ? possibilidade de vazamento, derramamento e transbordamento de combust?veis para o solo. Sendo ainda mais preocupante quando contaminam ?guas subterr?neas destinadas ao abastecimento p?blico, como o caso de Natal. Por este motivo, o Minist?rio P?blico/RN, em parceria com a UFRN, desenvolveu o projeto de adequa??o ambiental dos postos revendedores de combust?veis em Natal, dos quais 36% apresentaram ind?cios de contamina??o. Este trabalho descreve as quatro etapas do gerenciamento de ?reas contaminadas: avalia??o preliminar do passivo ambiental, investiga??o confirmat?ria detalhada da contamina??o, an?lise de risco a sa?de humana (RBCA), bem como o plano de remedia??o das ?reas degradadas. E apresenta um estudo de caso. Para a ?rea investigada ? proposto um m?todo matem?tico para estimar o volume de fase livre auxiliado por um software CAD livre (ScketchUp), este foi comparado com o m?todo de parti??o da ?rea por grid. Tamb?m s?o realizados os designs gr?ficos 3D das plumas de contamina??o. Os resultados da investiga??o de passivo mostraram que a contamina??o por benzeno na ?gua subterr?nea foi 2791,77 ?g/L, quando o m?ximo permitido pela Resolu??o CONAMA 420/2009 ? de 5 ?g/L que ? o padr?o de potabilidade. Os riscos individual e cumulativo calculados foram de 4,4x10-3, ambos acima dos limites aceit?veis pelo RBCA de 1,0x10-5 ou pelo Minist?rio P?blico/RN de 1,0x10-6. A a??o corretiva aponta que a remedia??o da fase dissolvida de benzeno dever? atingir uma concentra??o de 25 ?g/L, com base no risco carcinog?nico, para ingest?o de ?gua subterr?nea para moradores residenciais, divergindo da legisla??o. De acordo com o modelo proposto, o volume de fase livre utilizando o ScketchUp foi de ? de 17,59 m3, enquanto o m?todo de parti??o por grid foi de 14,02 m3. Devido ? baixa recupera??o, a previs?o de remo??o da fase livre ? de 11 anos, caso o sistema de extra??o multif?sica instalado no empreendimento n?o seja otimizado / 2020-01-01