Evaluation of the Acid Blue 161 dye degradation through electrochemical oxidation combined with microbiological systems

Autor(es)

de Almeida, E. J. R. ^[1] ; de Andrade, A. R. ^{[2, 3]} ; Corso, C. R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Sao Paulo Unesp, Inst Biociencias, Dept Bioquim & Microbiol, Ave 24-A 1515, BR-13506900 Rio Claro, SP - Brazil

^[2] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil

^[3] UNESP, Inst Chem, Natl Inst Alternat Technol Detect Toxicol Evaluat, POB 355, BR-14800900 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY; v. 16, n. 12, p. 8185-8196, DEC 2019.
• Citações Web of Science: 0

Resumo

Synthetic textile dyes have considerable molecular complexity, which makes these compounds highly stable and resistant to different types of treatments. Azo dyes represent the most commonly used group of dyes in textile industry. Azo dye contaminants in wastewater are recalcitrant, and microbiological treatments and oxidative processes have been widely studied to remedy this problem. These treatments can transform recalcitrant substances into substances with low toxicity. Therefore, microbiological and electrochemical/microbiological discoloration treatments were performed with the azo textile dye Acid Blue 161 in aqueous solution. The microbiological discoloration treatments were carried out using the filamentous fungus Aspergillus terreus and the yeast Saccharomyces cerevisiae. Discoloration treatments were performed with and without electrochemical pretreatment. The acute toxicity of the solutions was analyzed before and after the treatments using a vegetable test system (Lactuca sativa seeds). Adsorption treatment with white clay was performed to remove intermediate metabolites with high toxicological potential. At the end, all treatments tested were effective at discoloring the Acid Blue 161 dye solution. Moreover, the systems composed of the fungus A. terreus were more efficient and exhibited lower acute toxicity to L. sativa seeds at the end of 288 h of exposure to fungal biomass before and after adsorption treatment with white clay. (AU)

• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/25535-4 - Biorremediação de azo corantes têxteis empregando tratamentos microbiológicos e processos oxidativos avançados
• Beneficiário: Érica Janaina Rodrigues de Almeida
• Modalidade de apoio: Bolsas no Brasil - Doutorado