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Previous issue date: 2016-07-28 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A desativa??o de lix?es sem medidas de engenharia sanit?ria e ambiental amplia o potencial de degrada??o da ?rea podendo gerar outros passivos ambientais. Esses lix?es devem ser encaminhados a programas de recupera??o, baseados em diagn?sticos do solo que identifiquem os processos de degrada??o ambiental para auxiliar a recupera??o eficaz da ?rea degradada. Diante da obrigatoriedade de recupera??o dessas ?reas estabelecida pela legisla??o brasileira, os munic?pios necessitam de estudos como este para adequa??o a legisla??o brasileira e gest?o de seus res?duos s?lidos. O objetivo geral desse trabalho foi identificar os processos de degrada??o ambiental instalados na ?rea de disposi??o irregular de res?duos s?lidos no semi?rido tropical, a fim de nortear a implanta??o de programas de recupera??o dessa ?rea pelo munic?pio. Para tanto, buscou-se: (1) avaliar os atributos f?sicos e qu?micos do solo de cobertura do lix?o desativado do munic?pio de Olho D??gua do Borges, cujo resultados ser?o apresentados no CAP?TULO I dessa disserta??o; e (2) avaliar se a disposi??o irregular de res?duos s?lidos no lix?o promove a contamina??o do solo por metais pesados e amplia o potencial de difus?o para os demais componentes da bacia hidrogr?fica, o que ser? abordado no CAP?TULO II dessa disserta??o. Amostras de solo foram coletadas nas profundidades de 0-20 cm e 20-40 cm na ?rea do lix?o desativado, na ?rea de drenagem ef?mera do A?ude do Brejo e em ?rea sob mata nativa utilizada como refer?ncia de qualidade no munic?pio de Olho D??gua do Borges/RN. Foram avaliados nas tr?s ?reas os atributos: densidade do solo (Ds) e de part?culas (Dp), porosidade total (PT); granulometria, pH, condutividade el?trica (CE), mat?ria org?nica (MO), f?sforo dispon?vel (P), nitrog?nio total (N), c?tions troc?veis (Ca2+, Mg2+, Na+ e K+), acidez troc?vel e potencial e a partir desses o complexo sortivo do solo, teores de metais dispon?veis e totais. Com isso, a eros?o h?drica e e?lica, revolvimento do substrato de cobertura, sobrecarga de sais, de nutrientes e mat?ria org?nica, al?m da contamina??o por metais pesados s?o processos de degrada??o identificados como consequ?ncia da disposi??o irregular de res?duos s?lidos no solo. Esses processos contribuem com o aumento do potencial de difus?o dos contaminantes do lix?o para a bacia hidrogr?fica, ampliando a ?rea degradada. / Disabling dumpsites without sanitary and environmental engineering measures increases potential degradation of the area and may cause other environmental liabilities. These dumpsites should be sent to recovery programs, based on soil diagnostics to identify the environmental degradation processes to assist degraded area effective recovery. Given the obligation to recover these areas established by Brazilian law, municipalities need studies like this to adapt the Brazilian legislation and solid waste management. The general aim of this study was to identify the environmental degradation processes installed in solid waste irregular disposal area in tropical semiarid, in order to guide the implementation of recovery programs in this area by the municipality. Therefore, we sought to: (1) evaluate the physical and chemical attributes of the cover soil from the deactivated dumpsite of the municipality of Olho D??gua do Borges/RN, which results will be presented in CHAPTER I of this dissertation; and (2) assess whether the irregular disposal of solid waste in the dumpsite promotes soil contamination by heavy metals and expands the potential to spread to other parts of the watershed, which will be addressed in CHAPTER II of this dissertation. Soil samples were collected at depths of 0-20 cm and 20-40 cm on the deactivated dumpsite area, in ephemeral drainage area of Brejo dam and area under native forest used as quality reference in Olho D??gua do Borges/RN. Therefore, the evaluated attributes in three areas were: bulk density (BD) and particles density (PD), total porosity (TP), particle size, pH, electrical conductivity (EC), organic matter (OM), available phosphorus (P), total nitrogen (N), exchangeable cations (Ca2+, Mg2+, Na+ e K+), exchangeable and potential acidity, and from these the sorption complex soil, available and total metals contents. Thus, the water and wind erosion, substrate cover disturbance, overload salts, available phosphorus, nitrogen, organic matter and heavy metal contamination are degradation processes identified as result of irregular disposal of solid waste in the soil. These processes contribute to increase the potential diffusion of dumpsite contaminants to the watershed, expanding the degraded area.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/21688 |
| Date | 28 July 2016 |
| Creators | Alves, Giovana de Oliveira |
| Contributors | 00757656404, Silva, Fabiana Oliveira de Ara?jo, 05271617483, Menezes, Carla Gracy Ribeiro, 90456017453, Carvalho, Fab?ola Gomes de, 70959404449, Cunha, Karina Patricia Vieira da |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA SANIT?RIA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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