Toxic hexavalent chromium reduction by Bacillus pumilis,Cellulosimicrobium cellulans and Exiguobacterium

作     者：Fatima REHMAN Muhammad FAISAL 

作者机构：Department of Microbiology and Molecular Genetics University of the PunjabQuaid-e-Azam Campus 

出 版 物：《Chinese Journal of Oceanology and Limnology》 (中国海洋湖沼学报（英文版）)

年 卷 期：2015年第33卷第3期

页      面：585-589页

核心收录：

学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：Supported by the University of Punjab 

主　　题：chromium bioremediation heavy metals Bacilluspumilis Exiguobacterium Cellulosimicrobium cellulans 

摘      要：Three bacterial strains Bacillus pumilis, Cellulosimicrobium cellulans and ExtguoOactertum were investigated when grown in Luria-Bertani （LB） medium at 500 μg/mL Cr（VI）. The hexavalent chromium reduction was measured by growing the strains in DeLeo and Ehrlich （1994） medium at 200 and 400 μg/mL K2CrO4. The optimal Cr （VI） reduction by strains B. pumilis, Exigubacterium and C. cellulans was 51%, 39%, and 41%, respectively, at an initial KzCrO4 concentration of 200 ~tg/mL at pH 3 and temperature 37℃. At an initial chromate concentration of 400 gg/mL, the Cr（VI） reduction by strains B. purnilis, Exigubacterium and C. cellulans was 24%, 19%, and 18%, respectively at pH 3 at 37℃ after 24 h. These strains have ability to reduce toxic hexavalent chromium to the less mobile trivalent chromium at a wide range of different environmental conditions and can be useful for the treatment of contaminated wastewater and soils.