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International Journal of Zoology and Applied Biosciences Research Article
Comparative analysis of marine bacteria for the degradation of textile effluent dyes
S. Latha and K. Saravanan
Year : 2026 | Volume: 11 | Issue: 4 | Pages: 262-270
Received on: 03/06/2026
Revised on: 22/06/2026
Accepted on: 27/07/2026
Published on: 31/08/2026
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S. Latha and K. Saravanan( 2026).
Comparative analysis of marine bacteria for the degradation of textile effluent dyes
. International Journal of Zoology and Applied Biosciences, 11( 4), 262-270.
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Abstract
The discharge of textile dye effluents into aquatic environments poses a major ecological threat due to the toxic, persistent, and non-biodegradable nature of synthetic dyes. Biological treatment using marine bacteria has emerged as an eco-friendly and cost-effective approach for the remediation of dye-contaminated wastewater, especially under saline conditions. The present study aimed to isolate and evaluate potential marine bacterial strains for the degradation of textile dyes. Marine water and sediment samples were collected from coastal regions, and bacterial isolates were obtained using standard serial dilution and enrichment techniques. The isolates were screened for dye-degrading ability against azo dyes, particularly Mordant Black 17, under laboratory conditions. Among the four isolates obtained, two promising strains, A1 and A2, exhibited significant decolorization efficiency and were selected for further study. Based on morphological and biochemical characterization, the isolates were identified as Halomonas sp. and Bacillus cereus. At 100 ppm dye concentration, A1 showed a maximum decolorization efficiency of 70.0%, while A2 exhibited 63.2%. Optimization studies revealed that pH 7, temperature 40°C, and 10% inoculum size were optimal for enhanced dye degradation, achieving up to 98% decolorization under static conditions. The results demonstrate that marine bacterial strains, particularly Halomonas sp., possess strong potential for biodegradation of textile dyes and can be effectively applied for the treatment of saline textile wastewater in an environmentally sustainable manner.
Keywords
Dye, Marine Bacteria, Serial dilution, Halomonas sp. and Bacillus cereus.
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© The Author(s) 2026. This article is published by International Journal of Zoology and Applied Biosciences under the terms of the Creative Commons Attribution 4.0 International License (creativecommons.org), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
