Toxicity evaluation of textile effluents and role of native soil bacterium in biodegradation of a textile dye

Abstract

Water pollution caused by the discharge of hazardous textile effluents is a serious environmental problem worldwide. In order to assess the pollution level of the textile effluents, various physico-chemical parameters were analyzed in the textile wastewater and agricultural soil irrigated with the wastewater (contaminated soil) using atomic absorption spectrophotometer and gas chromatography-mass spectrometry (GC-MS) analysis that demonstrated the presence of several toxic heavy metals (Ni, Cu, Cr, Pb, Cd, and Zn) and a large number of organic compounds. Further, in order to get a comprehensive idea about the toxicity exerted by the textile effluent, mung bean seed germination test was performed that indicated the reduction in percent seed germination and radicle-plumule growth. The culturable microbial populations were also enumerated and found to be significantly lower in the wastewater and contaminated soil than the ground water irrigated soil, thus indicating the biotic homogenization of indigenous microflora. Therefore, the study was aimed to develop a cost effective and ecofriendly method of textile waste treatment using native soil bacterium, identified as Arthrobacter soli BS5 by 16S rDNA sequencing that showed remarkable ability to degrade a textile dye reactive black 5 with maximum degradation of 98% at 37 °C and pH in the range of 5-9 after 120 h of incubation.

Waste Management by Biological Approach Employing Natural Substrates and Microbial Agents for the Remediation of Dyes’ Wastewater

“…The textile dyes are highly toxic and potentially carcinogenic [31], causing damage to the environment and various diseases in animals and humans [32]. Bioremediation refers to the use of microbial systems to reduce, if not completely eliminate, the concentrations of toxic wastes, which could be hazardous to the ecosystem.…”

“…The textile industry effluents are recalcitrant to biodegradation due to the presence of various types of dyes, and in this way, they cause toxicity to water-sources. Therefore, the decolourisation and detoxification of textile wastewater are very important to degrade the toxic chemicals present in textile wastewater before releasing it into waterbodies [31][32][33].…”

Reusable, Free‐Standing MoS2/rGO/Cu2O Ternary Composite Films for Fast and Highly Efficient Sunlight Driven Photocatalytic Degradation

“…In recent years, an increase in industrialization and urbanization has led to severe environmental deterioration by pollutants that pose serious threat to mankind. Especially, industries that are associated with manufacturing paint, textiles, cosmetics and printing etc., discharge wastewater effluents that contain harmful organic pollutants like dyes and toxic substances directly into water bodies . These dyes undergo biological as well as chemical changes in water and consume dissolved oxygen which severely affects drinking water, aquatic life and interferes in the ecosystem .…”

“…Especially, industries that are associated with manufacturing paint, textiles, cosmetics and printing etc., discharge wastewater effluents that contain harmful organic pollutants like dyes and toxic substances directly into water bodies. [1] These dyes undergo biological as well as chemical changes in water and consume dissolved oxygen which severely affects drinking water, aquatic life and interferes in the ecosystem. [2] Hence, it is necessary to find efficient ways to degrade these harmful dyes from effluents economically and effectively.…”

An inexpensive and environmentally friendly staining method for semi-permanent slides from plant material probed using anatomical and computational chemistry analyses

“…Textile dyes are listed as the most hazardous industrial pollutants; they are highly visible and undesirable in effluents even in very low concentrations (Robinson et al 2001;Hubbe et al 2012;Vikrant et al 2018). In fact, the complete degradation of chemicals commonly used in such dyes involves onerous and expensive processes, and water and soil pollution caused by their occasional discharge in effluents is a critical environmental problem at a global scale (Khan & Malik 2018;Vikrant et al 2018). Thus, new alternative applications of such dyes need to be explored while considering the economic and environmental sustainability (Marcucci et al 2001;Granato et al 2017).…”