Banca de DEFESA: ALDENEIDIANE SANTANA DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ALDENEIDIANE SANTANA DOS SANTOS
DATA : 27/03/2020
HORA: 09:00
LOCAL: Instituto de Geociências
TÍTULO:

Evolucion the contaminesion of the soil for toxic metal

PALAVRAS-CHAVES:

 Soil quality, toxic metals, environmental monitoring, Santo Amaro.

PÁGINAS: 33
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Geologia
ESPECIALIDADE: Geologia Ambiental
RESUMO:

Contamination by toxic metals present in the soil of the municipality of Santo Amaro, Bahia, Brazil is a topic widely discussed by the scientific community and local news, especially in recent years. The evolution of research on the subject began in 1980, with the environmental monitoring carried out by Tavares (1990), in an attempt to expose the scenario of lead and cadmium contamination in soils and in a group of residents considered to be at high risk (women and children) ) and, through this, proved that the level of these metals in samples of soil and human material were above the limit proposed by law. To assess the quality of a contaminated soil, specific criteria and guidelines are necessary, respecting the heterogeneity of this resource. The use of guiding values from other countries can cause geochemical interpretations not consistent with the local reality. The National Environment Council brought, through resolution 420/2009, the appropriate methodology for assessing soil quality, regarding the presence of chemicals of anthropic origin and must be carried out based on Guiding Values of Quality Reference, of Prevention and Research. The study area is located in the former facilities of Plumbum Mineração e Metalurgia. The objective of this research is to evaluate a series of published works, a total of 20 (twenty), which were carried out on surface soils during the period from 1980 to 2019 in the municipality of Santo Amaro, considering that the existence of toxic metals in the soil are serious risks to public health and the environment. The applied methodology is restricted to Bibliographic Research and was divided into 4 (four) distinct phases, having as main indicators the period of publication and the fact that it marked a new phase in the research on the contamination of these soils. Finally, geostatistics is applied to analytical data for toxic elements (Pb, Cd, Zn, Cu, As and Ag) from the Plumbum Mineração e Metalurgia website provided by the CPRM-RJ and IGEO-UFBA partnership. The concentrations reveal average, minimum and maximum values for lead (Pb) 2,611.4, 179.5 and 12,500 mg / Kg; cadmium (Cd) 43.9, 4 and 230mg / Kg; zinc (Zn) 440, 81 and 2,399mg / Kg; copper (Cu) 115.6, 20 and 716mg / Kg; arsenic (As) 18.3, 2 and 118mg / Kg and silver (Ag) 2.8, 0.1 and 11mg / Kg, respectively. The research shows that, over the years, especially after 2009, the background values for the Santo Amaro region have not yet been defined by environmental entities, which reflects the non-compliance with the legislation. The case of Santo Amaro contamination requires the definition of these values in order to build legislation aimed at monitoring these elements in the region's soils. The study by Santos et al. 2017 is the first step, following the specifications of regulation 420/2009, but without recognition by the competent bodies of the State. The monitoring program initiative proposed by CPRM in partnership with IGEO-UFBA, for the next 20 years in the region, aims to obtain results that contribute to the improvement of environmental quality and, consequently, a higher quality of life for the population of Santo Amaro.

MEMBROS DA BANCA:
Presidente - 2564483 - JOSE ANGELO SEBASTIAO ARAUJO DOS ANJOS
Interno - 287703 - MANOEL JERONIMO MOREIRA CRUZ
Externo ao Programa - 2003074 - MARIA ELOISA CARDOSO DA ROSA