Effects of Cd on reductive transformation of lepidocrocite by Shewanella oneidensis MR-1  

作　　者：Chaolei Yuan Fangbai Li Rui Han Tongxu Liu Weimin Sun Weilin Huang 

机构地区：[1]Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science and Technology, Guangzhou 510650, China [2]Department of Environmental Sciences, Rutgers University,New Brunswick, NJ 08901, USA

出　　处：《Acta Geochimica》2017年第3期479-481,共3页地球化学学报（英文）

基　　金：financially supported by the National Natural Science Foundation of China(41601239);the Highlevel Leading Talent Introduction Program of GDAS,the China Postdoctoral Science Foundation(2016M600644);the"Pearl River Talents"Postdoctoral Program of Guangdong Province,and the National Key Research and Development Program of China(2016YFD0800703)

摘　　要：We investigated the reduction of lepidocrocite(γ-FeOOH) by Shewanella oneidensis MR-1 in the presence and absence of Cd. The results showed that Cd^(2+) retarded microbial reduction of γ-Fe OOH and avoided formation of magnetite. The inhibitory effect on γ-Fe OOH transformation may not result from Cd^(2+) toxicity to the bacterium; it rather was probably due to competitive adsorption between Cd^(2+) and Fe^(2+) on γ-Fe OOH as its surface reduction catalyzed by adsorbed Fe^(2+) was eliminated by adsorption of Cd^(2+).We investigated the reduction of lepidocrocite（γ-FeOOH） by Shewanella oneidensis MR-1 in the presence and absence of Cd. The results showed that Cd^2＋ retarded microbial reduction of γ-Fe OOH and avoided formation of magnetite. The inhibitory effect on γ-Fe OOH transformation may not result from Cd^2＋ toxicity to the bacterium; it rather was probably due to competitive adsorption between Cd^2＋ and Fe^2＋ on γ-Fe OOH as its surface reduction catalyzed by adsorbed Fe^2＋ was eliminated by adsorption of Cd^2＋.

关 键 词：LEPIDOCROCITE CADMIUM Microbial reduction 

分 类 号：S151.9[农业科学—土壤学]