Dissimilatory reduction of perchlorate and other common pollutants by a consortium enriched from tidal flats of the Yellow Sea  

作　　者：Nirmala Bardiya Jae-Ho Bae 

机构地区：[1]Department of Civil and Environmental Engineering,Inha University,Inharo 100,Nam-Gu,Inchon 402-751,South Korea

出　　处：《Journal of Coastal Life Medicine》2015年第9期696-700,共5页海岸生命医学杂志（英文版）

基　　金：Supported by INHA University(Research Grant No.51787).

摘　　要：Objective:To enrich a facultative anaerobic bacterial consortium from the Yellow Sea and assess its ability to reduce perchlorate and other co-pollutants.Methods:Bacterial consortium collected from the tidal flats of the Yellow Sea was enriched in an anoxic medium containing perchlorate as the electron(e^(-))acceptor and acetate as the electron(e^(-))donor.The enriched consortium was then tested for perchlorate reduction under different perchlorate concentrations and in the presence of nitrate by using standard anaerobic techniques.The complete enzymatic reduction of perchlorate to chloride was confirmed by chlorite dismutation.Ability of the consortium to grow with alternate e^(-)acceptors was also tested with acetate as the e^(-)donor.Results:The enriched consortium could rapidly reduce perchlorate up to the initial concentration of 25.65 mmol/L.In the presence of nitrate,perchlorate reduction did not occur immediately and reduction of nitrate started after a lag phase,with concomitant accumulation of nitrite.The perchlorate^(-)enriched consortium could reduce chlorate,oxygen,Cr(VI),and selenate as the alternate e^(-)acceptors but failed to utilize sulfate,thiosulfate,sulfite,and nitrite.Conclusions:The consortium from the tidal flats of the Yellow Sea could reduce perchlorate and co-contaminants such as chlorate,nitrate,Cr(VI),and selenate under heterotrophic conditions with acetate as the e^(-)donor and carbon source.While perchlorate was completely dismutated into innocuous chloride and oxygen,accumulation of nitrite occurred during the reduction of nitrate.

关 键 词：PERCHLORATE Dissimilatory reduction CONSORTIUM Alternate electron acceptor Electron donor 

分 类 号：O62[理学—有机化学]