Banca de DEFESA: JOÃO MANOEL DANTAS DE ANDRADE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOÃO MANOEL DANTAS DE ANDRADE
DATA : 31/07/2017
HORA: 09:00
LOCAL: Auditório do CCEA - CTEC/UFRN (Sala 212)
TÍTULO:

QUALITY LOSS AND SOIL CONTAMINATION IN THE SCHEELITE MINE IN TROPICAL SEMIARID

PALAVRAS-CHAVES:

Brejuí Mine. Soil quality. Environmental degradation. Heavy metals.

PÁGINAS: 45
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Sanitária
RESUMO:

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 Brejuí 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, Ca²⁺, Mg²⁺, Na⁺,K⁺, H⁺+Al³⁺, Al³⁺, sum of bases, total 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, Ca²⁺, 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.

MEMBROS DA BANCA:
Externo à Instituição - AIRON JOSÉ DA SILVA - UFS
Externo à Instituição - ANDRESA PRISCILA DE SOUZA RAMOS - EMF
Presidente - 1662859 - KARINA PATRICIA VIEIRA DA CUNHA