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Hues of risk: investigating genotoxicity and environmental impacts of azo textile dyes

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Abstract

The textile industry, with its extensive use of dyes and chemicals, stands out as a significant source of water pollution. Exposure to certain textile dyes, such as azo dyes and their breakdown products like aromatic amines, has been associated with health concerns like skin sensitization, allergic reactions, and even cancer in humans. Annually, the worldwide production of synthetic dyes approximates 7 × 107 tons, of which the textile industry accounts for over 10,000 tons. Inefficient dyeing procedures result in the discharge of 15–50% of azo dyes, which do not adequately bind to fibers, into wastewater. This review delves into the genotoxic impact of azo dyes, prevalent in the textile industry, on aquatic ecosystems and human health. Examining different families of textile dye which contain azo group in their structure such as Sudan I and Sudan III Sudan IV, Basic Red 51, Basic Violet 14, Disperse Yellow 7, Congo Red, Acid Red 26, and Acid Blue 113 reveals their carcinogenic potential, which may affect both industrial workers and aquatic life. Genotoxic and carcinogenic characteristics, chromosomal abnormalities, induced physiological and neurobehavioral changes, and disruptions to spermatogenesis are evident, underscoring the harmful effects of these dyes. The review calls for comprehensive investigations into the toxic profile of azo dyes, providing essential insights to safeguard the aquatic ecosystem and human well-being. The importance of effective effluent treatment systems is underscored to mitigate adverse impacts on agricultural lands, water resources, and the environment, particularly in regions heavily reliant on wastewater irrigation for food production.

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All authors listed have significantly contributed to this work and approved it for publication. K.R. and P.S.P.: conceptualization, data curation, formal analysis, writing–original draft, review, and editing. R.M.: formal analysis, writing–original draft, review, and editing. J.A.: conceptualization, data curation, formal analysis, supervision, writing–original draft, review and editing.

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Correspondence to Jesu Arockiaraj.

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Ramamurthy, K., Priya, P.S., Murugan, R. et al. Hues of risk: investigating genotoxicity and environmental impacts of azo textile dyes. Environ Sci Pollut Res 31, 33190–33211 (2024). https://doi.org/10.1007/s11356-024-33444-1

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  • DOI: https://doi.org/10.1007/s11356-024-33444-1

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