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Impacto das curtumes no ambiente das águas subterrâneas da cidade de Daca
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ISBN10: 6207819675
ISBN13: 9786207819676
Publisher: Edicoes Nosso Conhecimento
Published: May 27 2025
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786207819676
Publisher: Edicoes Nosso Conhecimento
Published: May 27 2025
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Portuguese
Daca é uma das cidades mais densamente povoadas do mundo. O aumento da população da cidade, aliado à urbanização e industrialização descontroladas, já afetou os componentes ambientais da área urbana. Hazaribagh é uma área residencial e industrial muito populosa da cidade, onde cerca de 185 curtumes operam, processando 220 toneladas métricas de couro por dia e 40 a 50 litros de lÃquido para cada quilograma de couro. Os efluentes industriais de Hazaribagh são descarregados em terras baixas e canais com altas concentrações de Na, Mg, Ca, NH4, Cl, SO4 e metais pesados, especialmente Cr, Fe, S, Mn, Zn, associados a alta matéria orgânica. Acumulação excessivamente alta de Cr é detectada no solo superficial e diminui significativamente abaixo de 3,0 m, enquanto Al, Fe, Mn, Zn, Ni, Cu são encontrados em nÃveis elevados até a profundidade investigada de 6 m. Embora não se tenha verificado contaminação nas águas subterrâneas profundas e o governo tenha decidido transferir as curtumes para fora da cidade, é necessária a reabilitação do solo superficial já contaminado e das águas poluÃdas do rio, bem como a implementação da Lei e das Regras de Conservação do Ambiente, a fim de reduzir a vulnerabilidade à contaminação da água.
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