The Indigo Blue dye is widely used in the textile industry, specifically in jeans dyeing, the effluents of which, rich in organic pollutants with recalcitrant characteristics, end up causing several environmental impacts, requiring efficient treatments. Several pieces of research have been conducted in search of effective treatment methods, among which is electrocoagulation. This treatment consists of an electrochemical process that generates its own coagulant by applying electric current on metallic electrodes, bypassing the use of other chemical products. The objective of this work was to evaluate the potential use of iron slag in the electrocoagulation of a synthetic effluent containing commercial dye Indigo Blue and the effluent from a textile factory. The quantified parameters were color, turbidity, pH, electrical conductivity, sludge generation, phenol removal, chemical oxygen demand (COD), and total organic carbon (TOC). The electrocoagulation treatment presented a good efficiency in removing the analyzed parameters, obtaining average removal in the synthetic effluent of 85 % of color and 100 % of phenol after 25 min of electrolysis. For the effluent from the textile factory, average reductions of 80 % of color, 91 % of turbidity, 100 % of phenol, 55 % of COD, and 73 % of TOC were measured after 60 min of electrolysis. The results obtained demonstrate the potential of using iron slag as an electrode in the electrocoagulation process in order to reuse industrial waste and reduce costs in the treatment and disposal of solid waste.
ResumoPara prevenir a degradação da qualidade de corpos hídricos, o lançamento de esgotos domésticos tem padrões limitados por legislação vigente, ficando condicionado a realização de um tratamento prévio. Dentre as alternativas de tratamento, a eletrocoagulação-flotação, processo eletroquímico que combina os mecanismos de oxidação, coagulação, floculação e flotação, têm se demonstrado capaz de promover um tratamento adequado para águas residuárias, além de apresentar aspectos positivos nas perspectivas operacional, econômica e sustentável. O objetivo deste estudo foi avaliar o desempenho de um sistema de tratamento de esgoto doméstico composto por um reator de eletrocoagulação-flotação. O estudo foi realizado em um reator cilíndrico, com 1 L de capacidade, equipado com um par eletrodos de alumínio, conectados a uma fonte de alimentação de corrente contínua. As condições experimentais de distância entre os eletrodos, corrente elétrica, tempo de eletrólise e agitação foram de 1 cm, 1,5 A, 20 min e 262,5 rpm, respectivamente. O desempenho do sistema foi verificado através da análise de parâmetros físico-químicos do esgoto antes e após o tratamento. Com base nos resultados obtidos, foi possível concluir que o sistema de eletrocoagulação-flotação apresentou um desempenho satisfatório no tratamento de esgoto doméstico, sendo verificadas eficiências de remoção médias de 78,9% de demanda química de oxigênio, 97,3% de cor aparente e 90,1% de turbidez. A qualidade do esgoto, verificada após o tratamento no sistema, esteve em conformidade com a legislação vigente de despejo em corpos hídricos receptores, com exceção do pH, que se manteve na faixa de 9,1, indicando a necessidade de uma etapa adicional de correção de pH ao tratamento. Palavras-chaveEletrocoagulação-flotação, eletrodos de alumínio, esgoto doméstico.Analisys of the performance of an electrochemical system for the domestic wastewater treatment AbstractIn order to prevent the degradation of the water bodies quality, the domestic wastewater discharge has standards limited by prevailing legislation, which is conditioned by accomplishment of a previous treatment. Among the treatment alternatives, the electrocoagulationflotation, an electrochemical process that combines the mechanisms of oxidation, coagulation, flocculation and flotation, has been shown capable to promote an adequate treatment for wastewater, showing positive aspects in the operational, economic and sustainable perspectives. The objective of this study was to evaluate the performance of a domestic wastewater treatment system composed of an electrocoagulationflotation reactor. The study was carried out in a cylindrical reactor, with 1 L of capacity, equipped with a pair of aluminum electrodes, connected to a direct-current power supply. The experimental conditions of distance between the electrodes, electrical current, electrolysis time and agitation were 1 cm, 1.5 A, 20 min and 262.5 rpm, respectively. The performance of the system was verified through the analysis of physical and chemical parameter...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.