Biodegradation of Crystal Violet dye by bacteria isolated from textile industry effluents

Roy, Dipankar Chandra and Biswas, Sudhangshu Kumar and Saha, Ananda Kumar and Sikdar, Biswanath and Rahman, Mizanur and Roy, Apurba Kumar and Prodhan, Zakaria Hossain and Tang, Swee Seong (2018) Biodegradation of Crystal Violet dye by bacteria isolated from textile industry effluents. PeerJ, 6. e5015. ISSN 2167-8359, DOI

Full text not available from this repository.
Official URL:


Industrial effluent containing textile dyes is regarded as a major environmental concern in the present world. Crystal Violet is one of the vital textile dyes of the triphenylmethane group; it is widely used in textile industry and known for its mutagenic and mitotic poisoning nature. Bioremediation, especially through bacteria, is becoming an emerging and important sector in effluent treatment. This study aimed to isolate and identify Crystal Violet degrading bacteria from industrial effluents with potential use in bioremediation. The decolorizing activity of the bacteria was measured using a photo electric colorimeter after aerobic incubation in different time intervals of the isolates. Environmental parameters such as pH, temperature, initial dye concentration and inoculum size were optimized using mineral salt medium containing different concentration of Crystal Violet dye. Complete decolorizing efficiency was observed in a mineral salt medium containing up to 150 mg/l of Crystal Violet dye by 10% (v/v) inoculums of Enterobacter sp. CV-S1 tested under 72 h of shaking incubation at temperature 35 °C and pH 6.5. Newly identified bacteria Enterobacter sp. CV-S1, confirmed by 16S ribosomal RNA sequencing, was found as a potential bioremediation biocatalyst in the aerobic degradation/de-colorization of Crystal Violet dye. The efficiency of degrading triphenylmethane dye by this isolate, minus the supply of extra carbon or nitrogen sources in the media, highlights the significance of larger- scale treatment of textile effluent.

Item Type: Article
Uncontrolled Keywords: Biodegradation; Crystal violet dye; Enterobacter sp.; Textile effluent
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 09 Apr 2019 08:20
Last Modified: 09 Apr 2019 08:20

Actions (login required)

View Item View Item