文章基本信息

标题：Chromium (VI) tolerance and bioaccumulation by Candida tropicalis isolated from textile wastewater
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作者：Ilyas, Sidra ; Bukhari, Dilara A. ; Rehman, Abdul 等
期刊名称：Sustainable Environment Research
印刷版ISSN：2468-2039
出版年度：2020
卷号：30
期号：1
页码：1-8
DOI：10.1186/s42834-020-00069-1
语种：English
出版社：Elsevier
摘要：In the present study a yeast strain isolated from industrial wastewater, identified as Candida tropicalis, showed chromium (Cr) tolerance level up to 5 mM. Yeast grown in minimal salt medium containing Cr (VI) ions for 48 h and crude enzyme extracts were tested for chromate reductase activity. Optimum temperature and pH of chromate reductase were 30 °C and pH of 7. The enzyme activity was greatly enhanced in the presence of divalent metal cations. Total protein profile revealed some protein bands were present in hexavalent chromium [Cr (VI)] treated samples but were absent in non-treated samples, especially low molecular-weight protein bands in the mass range of < 25 kDa with greater intensity in Cr (VI) treated samples. Yeast cells were able to uptake Cr (VI) between 21 and 80 mg g− 1 within 2–12-d of time, indicating yeast strain promising potential for Cr (VI) removal from the wastewater. The present study results suggest that C. tropicalis is a suitable candidate for bioremediating chromium ions from the contaminated-environment.
关键词：Candida tropicalis;Cr (VI) resistance;Chromate reductase;Bioremediation