Banca de QUALIFICAÇÃO: SUELLEN NUNES DE ARAÚJO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : SUELLEN NUNES DE ARAÚJO
DATE: 24/02/2022
TIME: 14:00
LOCAL: meet.google.com/jht-xhux-qae
TITLE:

"Potentially toxic elements and environmental indices in rehabilitation areas of copper and gold mining in the Eastern Amazon"

KEY WORDS:

Recovery; Mining; Copper; Gold; Soil Quality; Environmental Indexes.

PAGES: 53
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Mining activity generates by-products that have physical, chemical and biological variation, generally presenting characteristics such as low concentrations of nutrients and organic matter and high concentration of some potentially toxic elements that restrict the establishment of ecosystems. Therefore, it is a challenge for mining companies to recover these areas with mining by-products, considered environmental liabilities. Therefore, it is
essential to monitor the recovery processes for the return of ecosystem services in these areas, being evaluated for changes in chemical attributes such as fertility. and waste dumps of mining by-products as well as in surrounding areas, in order to assess whether there are environmental risks. The objective of this study was to evaluate soil quality in areas undergoing environmental recovery and in the vicinity of copper (Cu) and gold (Au)
mining in the Eastern Amazon, in addition to identifying the levels of potentially toxic elements and determining factors and indices of contamination and ecological risk of these elements. The study was carried out in areas of mining by-products and in adjacent areas of the Cu do Sossego and Au do Igarapé Bahia and Águas Claras mines. Soil samples were collected and analyzed for their chemical and physical attributes, in addition to an environmental analysis of these areas. In the study carried out in the areas of the copper mine, the contents of Co, Cu and Ni in the tailings area exceeded the prevention values, reference values for soil quality and average concentrations of the upper continental crust, however, the tailings area was considered unpolluted according to the pollution load index, in addition to low potential ecological risk. For the gold mine residue
areas, regarding the potential of ecological risk, it was observed for a sterile pile a value classified as high, for a pit area a moderate value and for the other areas, values of low classification.

BANKING MEMBERS:
Externo à Instituição - REGLA TOUJAGUEZ LA ROSA MASSAHUD - UFAL
Interno - 6388356 - ANTONIO RODRIGUES FERNANDES
Externo à Instituição - GABRIEL CAIXETA MARTINS - ITV
Presidente - 030.493.086-56 - SILVIO JUNIO RAMOS - ITV