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CaracterÃsticas das águas residuais das fábricas de curtumes e análise das tendências na Etiópia
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ISBN10: 6208974232
ISBN13: 9786208974237
Publisher: Edicoes Nosso Conhecimento
Published: Jun 18 2025
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208974237
Publisher: Edicoes Nosso Conhecimento
Published: Jun 18 2025
Pages: 52
Weight: 0.18
Height: 0.12 Width: 6.00 Depth: 9.00
Language: Portuguese
O estudo examina as caracterÃsticas das águas residuais descarregadas pelas fábricas de curtumes na Etiópia. Foram recolhidas amostras de águas residuais no ponto de descarga para determinar os parâmetros fÃsico-quÃmicos. A concentração de crómio (3+) nas águas residuais foi determinada pelo SLC 208. A análise das águas residuais também foi realizada em laboratório pelos métodos APHA2540-D, APHA 5220 B-COD, APHA 4550-Cl-B, APHA 4500-NH3, SLC 202 e Hack Lange (LCK349), respetivamente, para determinar os teores de TSS, COD, Cl, amonÃaco, sulfuretos e fosfatos. O valor médio de cada parâmetro das águas residuais foi comparado com o valor padrão definido pelo Ministério do Ambiente, Florestas e Alterações Climáticas. O resultado de Cr(3+), PH, TSS, COD, Cl, amonÃaco, sulfuretos e fosfato é 27,6 mg/litro, 7,63 unidades de pH, 631,4 mg/litro, 1597,9 mg/litro, 2493 mg/litro, 111,2 mg/litro e 52,35 mg/litro e 0,78 mg/litro, respetivamente. Os resultados de todos os parâmetros, exceto pH e fosfato, estavam acima dos valores padrão estabelecidos pelo Ministério do Ambiente, Florestas e Alterações Climáticas. O resultado do estudo indicou que os parâmetros fÃsico-quÃmicos das águas residuais descarregadas pelas fábricas de curtumes contêm uma elevada carga poluente e têm impacto na saúde humana e no ecossistema aquático.
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