Continuous electrochemical reactor improved by the addition of Moringa oleífera lam extract: optimization of operational conditions for Blue 5G dye removal
Revista Ambiente E Água
Continuous electrochemical reactor improved by the addition of Moringa oleífera lam extract: optimization of operational conditions for Blue 5G dye removal
Autor Correspondente: Eduardo Eyng | [email protected]
Palavras-chave: central composite rotational design, global optimization of processes, natural coagulant, textile effluent, wastewater electrochemical treatment.
Resumos Cadastrados
Resumo Português:
Os efluentes das indústrias têxteis são conhecidos pela dificuldade de tratamento, constituindo um campo de aplicação de tecnologias alternativas para o tratamento. Neste contexto, um sistema de tratamento híbrido, composto por eletrocoagulação associada à adição de coagulante natural (extrato de sementes de Moringa oleífera lam), visa utilizar condições de operação mais suaves, que proporcionem eficiência de tratamento, com menor demanda de energia elétrica e coagulante. Assim, a remoção do corante reativo Azul 5G de soluções aquosas foi estudada. Foram avaliados os efeitos dos fatores: intensidade da corrente elétrica, concentração de coagulantes naturais e tempo de retenção hidráulica. Um modelo quadrático foi ajustado e validado no nível de significância de 5%. A otimização global resultou em condições de 0,28 A para intensidade de corrente elétrica, 1000,00 mg L-1 de extrato aquoso de Moringa oleífera lam e 5 min para tempo de retenção hidráulica. Operando em condições ótimas, observou-se 71,38% de remoção de cor e 5,22 mg L-1 de concentração residual de ferro.
Palavras-chave: coagulante natural, delineamento composto central rotacional, efluentes têxteis, otimização global de processos, tratamento eletroquímico de águas residuárias.
Resumo Inglês:
Wastewaters from textile industries are known for their difficulty to treat, several alternative technologies are applied for their treatment. In this context, the study examined a hybrid treatment system, composed of electrocoagulation combined with a natural coagulant (extract of Moringa oleífera lam seeds) to remove reactive dye Blue 5G aqueous solutions. The work evaluated the use of milder operating conditions to improve the efficiency of treatment, with reduced demands for electrical power and coagulant. The following factors were evaluated: electric current intensity, natural coagulant concentration and hydraulic retention time. A quadratic model was adjusted and validated at a 5% significance level. The overall optimization resulted in conditions of 0.28 A for electrical current intensity, 1000.00 mg L-1 of aqueous extract of Moringa oleífera lam and 5 min for hydraulic retention time. While operating under optimal conditions, the removal of 71.38% of color and 5.22 mg L-1 of iron residual concentration was achieved.
Resumo Espanhol:
Wastewaters from textile industries are known for their difficulty to treat, several alternative technologies are applied for their treatment. In this context, the study examined a hybrid treatment system, composed of electrocoagulation combined with a natural coagulant (extract of Moringa oleífera lam seeds) to remove reactive dye Blue 5G aqueous solutions. The work evaluated the use of milder operating conditions to improve the efficiency of treatment, with reduced demands for electrical power and coagulant. The following factors were evaluated: electric current intensity, natural coagulant concentration and hydraulic retention time. A quadratic model was adjusted and validated at a 5% significance level. The overall optimization resulted in conditions of 0.28 A for electrical current intensity, 1000.00 mg L-1 of aqueous extract of Moringa oleífera lam and 5 min for hydraulic retention time. While operating under optimal conditions, the removal of 71.38% of color and 5.22 mg L-1 of iron residual concentration was achieved.
