Sustainable approach to decolourize methyl orange dye from aqueous solution using novel bacterial strain and its metabol
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ORIGINAL PAPER
Sustainable approach to decolourize methyl orange dye from aqueous solution using novel bacterial strain and its metabolites characterization C. Femina Carolin1 · P. Senthil Kumar1 · G. Janet Joshiba1 Received: 7 August 2020 / Accepted: 25 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The present report deals with the identification of new bacteria for the degradation of sulphonated azo dye such as methyl orange because this type of dye is difficult to degrade by the physico-chemical method. Hence, an eco-friendly and efficient technique like biological method was studied to degrade methyl orange. Initially, three strains were isolated from the flasks containing media amended with textile wastewater using the serial dilution process. Out of three strains, micrococcus yunnanensis exhibited a higher decolourization efficacy in 100 mg L−1, and hence, this strain was chosen for further optimization studies and metabolites identification. This is the first report to study the micrococcus species in methyl orange degradation according to our knowledge. The optimum parameters for the decolourization of methyl orange were found to be pH 7, temperature at 30 °C and dye concentration at 100 mg L −1. The carbon source and nitrogen source suited well for the decolourization were observed as 1% glucose and 1% peptone. The metabolites obtained after degradation of methyl orange were analysed using FT-IR and GC–MS analysis. The final product obtained from the degraded sample was found to be N, N-Diethyl-N’-methyl-1,3-propane diamine. Graphic abstract
Keywords Methyl orange · Decolourization · Micrococcus yunnanensis · Optimization studies · Metabolites Extended author information available on the last page of the article
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Introduction With an increase in population growth globally, the sectors like industries, transportation and residential sectors are increasing in a parallel way (Saravanan et al. 2018). Henceforth, miscellaneous pollutants are released into the surroundings because of the higher utilization of chemicals for the manufacturing process in diverse industries. Human negligence of environmental protection and ineffective implementation of standards are the main causes of environmental pollution (Chiong et al. 2016). The untreated effluent to the agricultural land creates a serious effect on humans (Li et al. 2017). The release of these effluents limits the penetration of light into the water which affects the photosynthetic process as well as food source of aquatic species (Elumalai and Saravanan 2016). Adverse effects are faced by the environment directly or indirectly to all life forms (Bencheqroun et al. 2019). The major source of toxic pollutants to humans and the environment is organic dyes (Lian et al. 2017). Significant usage of azo dyes can be seen in the textile industry, tanning industry, leather industry, paper making and cosmetic industries, etc. (Popli and Patel 2015; Fan et al. 2017; Ghaedi et al. 2016). In each year,
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