Detalhes bibliográficos
| Ano de defesa: |
2014 |
| Autor(a) principal: |
Sá, Joyse de Mesquita Lindoso de
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| Orientador(a): |
FRANCO, Teresa Cristina R. dos Santos
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| Banca de defesa: |
Soledade, Luiz Edmundo Bastos
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| Tipo de documento: |
Dissertação
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| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Federal do Maranhão
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| Programa de Pós-Graduação: |
PROGRAMA DE PÓS-GRADUAÇÃO EM ENERGIA E AMBIENTE/CCET
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| Departamento: |
Energia e Ambiente
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| País: |
BR
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| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://tedebc.ufma.br:8080/jspui/handle/tede/679
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Resumo: |
The paper presents an assessment of physico-chemical monitoring data made for the waters in f São Marcos Bay, São Luis, Maranhão. Selected six (6) monitoring stations in São Marcos Bay, distributed during rainy and dry seasons and the ebb and flood tides, the year 2008-2013. The monitoring stations were selected to represent the San Marcos Bay, checking for the environmental situation and the effect by human activities in the region. The physical and chemical water quality parameters, pH, salinity, turbidity, transparency, electrical conductivity, dissolved oxygen, sulfide, total lead, dissolved iron, manganese total and total nickel zinc were evaluated based on CONAMA 357/05. The analysis showed that it was a predominance of neutral waters, average pH ranging from 7.6 to 7.9 in the monitoring stations in São Marcos Bay. The average salinity calculated for stations has remained around 25. This rate characterized the environment as to brackish water. During the rainy season (April to July), the concentration of metals that showed violations of legal standards in all monitoring stations, with a higher occurrence near the industrial area. The behavior of these metals is associated with various physical and chemical factors and the various human activities that take place in the region under study. The other parameters the other parameters presented average had means within the limits established for this type of water. For this type of water. Considering the expanded uncertainties of the analytical methods, the parameters analyzed showed considerable probability that showed violations of legal standards in most of the monitoring stations, especially pH and Total Manganese parameter. The nickel total and total zinc parameters legal standards aren t exceeded. It is therefore the monitored environment has changed and is therefore needs to be evaluated more fully in future studies. |
