Isolation and characterization of chromium(VI)-reducing Bacillus sp FY1 and Arthrobacter sp WZ2 and their bioremediation potential
文献类型： 外文期刊
作者： Xiao, Wendan 1 ; Ye, Xuezhu 1 ; Yang, Xiaoe 2 ; Zhu, Zhiqiang 3 ; Sun, Caixia 1 ; Zhang, Qi 1 ; Xu, Ping 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, State Key Lab Breeding Base Zhejiang Sustainable, Hangzhou 310021, Zhejiang, Peoples R China
2.Zhejiang Univ, Coll Environm & Resource Sci, Minist Educ, Key Lab Environm Remediat & Ecol Hlth, Hangzhou, Zhejiang, Peoples R China
3.Hainan Univ, Coll Agr, Haikou, Peoples R China
关键词： Arthrobacter;Bacillus;bioremediation potential;chromium-reducing bacteria;chromium resistance
期刊名称：BIOREMEDIATION JOURNAL （ 影响因子：1.909； 五年影响因子：2.262 ）
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收录情况： SCI
摘要： Two native bacterial strains, FY1 and WZ2, that showed high chromium(VI)-reducing ability were respectively isolated from electroplating and tannery effluent-contaminated sites and identified as Bacillus and Arthrobacter. The objective of the present study was to evaluate their potential for future application in soil bioremediation. The results showed that both Bacillus sp. FY1 and Arthrobacter sp. WZ2 were tolerant to 1000mg L-1 Cr(VI) and capable of reducing 78-85% and 75-82% of Cr(VI) (100-200mg L-1) within 24h, respectively. The Cr(VI) reduction rate decreased with increasing levels of Cr(VI) concentration (200-1000mg L-1). The optimum pH, temperature, and inoculum concentration for Cr(VI) reduction were found to be between pH 7.0 and 8.0; 30 and 35 degrees C; and 1x 10(8) cells ml(-1), respectively. Further evidence for the bioremediation potential of Bacillus sp. FY1 and Arthrobacter sp. WZ2 was provided by the high capacity to reduce 100, 200, and 500mg kg(-1) Cr(VI) in contaminated soil by 83-91%, 78-85%, and 71-78% within 7days, respectively. These findings demonstrated the high potential of Bacillus sp. FY1 and Arthrobacter sp. WZ2 for application in future soil bioremediation.
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