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Previous issue date: 2017-07-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A disposi??o irregular de pilhas de rejeito e est?ril causa degrada??o ambiental. Pilhas de rejeito e est?ril s?o fontes de contamina??o continua do ambiente, impactando principalmente o solo, reduzindo sua qualidade a partir de altera??es nos seus atributos f?sicos e qu?micos e na disposi??o de metais pesados. O presente trabalho teve como objetivo avaliar os atributos f?sicos e qu?micos e teores de metais pesados dispon?veis do solo da Mina Breju?. Foram coletadas amostras de solo em nove locais da minera??o e um em mata nativa que serviu de refer?ncia de qualidade. Foi feita an?lise dos atributos f?sicos (densidade do solo, de part?cula, porosidade total e granulomentria), qu?micos (pH, condutividade el?trica, Ca??, Mg??, Na,K?, H?+Al??, Al??, soma de bases, capacidade de troca de c?tions potencial, satura??o por bases e por alum?nio e mat?ria org?nica) e teores de metais pesados dispon?veis (Fe, Mn, Cd, Cr, Cu, Ni, Pb e Zn). A minera??o de scheelita provoca perdas de qualidade do solo. Os atributos f?sicos e qu?micos, mais sens?veis na distin??o entre as ?reas mineradas e a mata nativa s?o Ds, MO, Ca??, CE, pH e acidez potencial, os quais podem ser utilizados em programas de monitoramento ambiental da ?rea. Os processos de degrada??o do solo mais evidentes nas ?reas mineradas s?o a compacta??o, saliniza??o, redu??o dos teores de mat?ria org?nica e contamina??o por metais pesados. Os metais Cd, Ni e Pb est?o sendo disponibilizados a partir das pilhas de res?duos da minara??o de scheelita ultrapassando os Valores de Refer?ncia de Qualidade do Solo do estado do Rio Grande Norte. ? necess?rio a elabora??o de um plano de gest?o e recupera??o da ?rea minerada visando a disposi??o adequada dos res?duos, com ?nfase a pilha de rejeitos ferrosos, e a mitiga??o dos processos de degrada??o evidenciados no presente estudo. / The irregular disposition of amounts of tailings causes environmental degradation. Piles of tailings are regular sources of contamination in the environment, impacting, mainly, in the soil, reducing its quality by changes in its physical and chemical attributes and also by the deposition of heavy metals. The main objective of this study was the evaluation of physical and chemical attributes, and also evaluate the heavy metals content in the soil of Breju? Mine. It was collected soil samples in nine mining places and also it was collected soil samples from a native forest place, the last one it was used as quality reference. It was analyzed physical attributes (soil particle density, total porosity and granulometry), chemicals (pH, electric conductivity, Ca??, Mg??, Na?,K?, H?+Al??, Al??, sum of bases, potential cation exchange capacity, saturation by bases and by aluminum, organic matter) and available metals contents (Fe, Mn, Cd, Cr, Cu, Ni, Pb e Zn). The scheelite mining causes losses in the soil quality. Physical and Chemicals attributes more affected when compared to native forest areas are Ds, MO, Ca??, CE, pH and potential acidity, those attributes can be used in programs of environmental monitoring of the area. The most evident degradation processes in the mining area are compaction, salinization, depletion in the organic matter contents and contamination by heavy metals. Metals like Cd, Ni e Pb are been available by piles of mining waste of scheelite exceeding reference values of soil quality for Rio Grande do Norte state. It is necessary the elaboration a plan to manage and recover the mining area aiming adequate disposition of wastes, with emphasis on the pile of ferrous tailings, and the mitigation of degradation processes evidenced in the present study.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/24019 |
| Date | 31 July 2017 |
| Creators | Andrade, Jo?o Manoel Dantas de |
| Contributors | 00757656404, Silva, Airon Jos? da, 04748013494, Ramos, Andresa Priscila de Souza, 05383923470, 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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