Evaluation of the Acid Blue 161 dye degradation through electrochemical oxidation combined with microbiological systems
- 27 Downloads
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.
KeywordsAzo dyes Water treatment Combination treatments Microbiological treatments Electrochemical treatments Lactuca sativa
Our research group received funding from the following Brazilian fostering agencies and institutions: Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP [State of São Paulo Research Assistance Foundation]; Process Number: 2013/25535-4 and FAPESP: 2014/50945-4); this study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001; Conselho Nacional de Desenvolvimento Científico e Tecnológico [CNPq [National Council of Scientific and Technological Development]) Process Number: INCT 465571/2014-0, Fundação para o Desenvolvimento da UNESP (FUNDUNESP [Foundation for the Development of São Paulo State University]) and Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP [São Paulo State University]).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Coates J (2000) Interpretation of infrared spectra, a practical approach. Wiley, Chichester, p 2188Google Scholar
- Dyer JR (1969) Applications of absorption spectroscopy to organic compounds. Edgard Blucher, São Paulo, p 155Google Scholar
- Glenn JK, Gold MH (1983) Decolorization of several polymeric dyes by the lignin-degrading basidiomycete Phanerochaete chrysosporium. Appl Environ Microbiol 45:1741–1747Google Scholar
- Hsueh CC, Chen CT, Hsu AW, Wu CC, Chen BY (2017) Comparative assessment of azo dyes and nitroaromatic compounds reduction using indigenous dye-decolorizing bacteria. J Taiwan Inst Chem Eng 04:01–07Google Scholar
- Lala AO, Oso AO, Ajao AM, Idowu OM, Oni OO (2015) Effect of supplementation with molecular or nano-clay adsorbent on growth performance and haematological indices of starter and grower turkeys fed diets contaminated with varying dosages of aflatoxin B1. Liverstock Sci 178:209–215CrossRefGoogle Scholar
- Lodder J (1970) The yeast: a taxonomic study, 2nd edn. North Holland Publish Company, AmsterdamGoogle Scholar
- Lowry OH, Rosebrough NJ, Farr AL, Randall RJ (1951) Protein measurement with the Folin phenol reagent. J Biol Chem 193:265–275Google Scholar
- Marcanti-Contato I, Corso CR, Oliveira JE (1997) Induction of physical paramorfogenesis in Aspergillus sp. Microbiol J 28:65–67Google Scholar
- Silverstein RM, Bassler GC, Morril TC (1994) Spectrometric identification of organic compounds, 5th edn. Guanabara Koogan, Rio de JaneiroGoogle Scholar
- Sobrero MS, Ronco A (2008) Ensayo de toxicidad aguda con semillas de lechuga Lactuca sativa L. In: Romero PR, Cantú AM (eds) Ensayos Toxicológicos para la evaluacion de substancias químicas em agua y suelo, 1st edn, Mexico, pp 55–68Google Scholar
- Zhang C, Zhu Z, Zhang H (2017) Mg-based amorphous alloys for decolorization of azo dyes. Res Phys 07:2054–2056Google Scholar