首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Reduction of chromate by cell-free extract of Brucella sp. isolated from Cr(VI) contaminated sites
Authors:Thacker Urvashi  Parikh Rasesh  Shouche Yogesh  Madamwar Datta
Institution:Post Graduate Department of Biosciences, Sardar Patel University, Vallabh Vidyanagar 388 120, Gujarat, India.
Abstract:A locally isolated gram negative strain of Brucella sp., identified by biochemical methods and 16SrRNA analysis, reduced chromate to 100%, 94.1%, 93.2%, 66.9% and 41.6% at concentrations of 50, 100, 150, 200 and 300mgl(-1), respectively at pH 7 and temperature 37 degrees C. Increasing concentrations of Cr(VI) in the medium lowered the growth rate but could not be directly correlated with the amount of Cr(VI) reduced. The strain also exhibited multiple heavy metal (Ni,Zn,Hg,Pb,Co) tolerance and resistance to various antibiotics. Assay with crude cell-free extracts demonstrated that the hexavalent chromium reduction was mainly associated with the soluble fraction of the cell. High Cr(VI) concentration resistance and high Cr(VI) reducing ability of the strain make it a suitable candidate for bioremediation.
Keywords:
本文献已被 ScienceDirect PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号