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Cr(VI) Resistance and Removal by Indigenous Bacteria Isolated from Chromium-Contaminated Soil
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  • Cr(VI) Resistance and Removal by Indigenous Bacteria Isolated from Chromium-Contaminated Soil
  • Cr(VI) Resistance and Removal by Indigenous Bacteria Isolated from Chromium-Contaminated Soil
저자명
Long. Dongyan,Tang. Xianjin,Cai. Kuan,Chen. Guangcun,Shen. Chaofeng,Shi. Jiyan,Chen. Linggui,Chen. Yingxu
간행물명
Journal of microbiology and biotechnology
권/호정보
2013년|23권 8호|pp.1123-1132 (10 pages)
발행정보
한국미생물생명공학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The removal of toxic Cr(VI) by microorganisms is a promising approach for Cr(VI) pollution remediation. In the present study, four indigenous bacteria, named LY1, LY2, LY6, and LY7, were isolated from Cr(VI)-contaminated soil. Among the four Cr(VI)-resistant isolates, strain LY6 displayed the highest Cr(VI)-removing ability, with 100 mg/l Cr(VI) being completely removed within 144 h. It could effectively remove Cr(VI) over a wide pH range from 5.5 to 9.5, with the optimal pH of 8.5. The amount of Cr(VI) removed increased with initial Cr(VI) concentration. Data from the time-course analysis of Cr(VI) removal by strain LY6 followed first-order kinetics. Based on the 16S rRNA gene sequence, strain LY6 was identified as Pseudochrobactrum asaccharolyticum, a species that had never been reported for Cr(VI) removal before. Transmission electron microscopy and energy dispersive X-ray spectroscopy analysis further confirmed that strain LY6 could accumulate chromium within the cell while conducting Cr(VI) removal. The results suggested that the indigenous bacterial strain LY6 would be a new candidate for potential application in Cr(VI) pollution bioremediation.