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《Environmental Science & Technology》 2012-12
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Effect of Heavy Metal on Sulfate Reducing Bacteria

CAO Heng-heng,ZHANG Hong-guo,LUO Ding-gui, CHEN Yong-heng,ZHANG Qing-he(School of Environmental Science and Engineering,Guangzhou University,Guangzhou 510006,China)  
This paper related to a bench scale experiment for treatment of wastewater containing both sulfate and heavy metals ions of Cu2+,Cd2+,Ni2+ and Hg2+ with emphasis on influences of heavy metals on sulfate-reduction bacteria(SRB)in the anaerobic activated sludge system(UASB reactor).The experiment presented the maximum sulfate reduction rates-all above 91%-when affected by Cu2+,Cd2+ and Hg2+ of limited concentrations respectively;the strongest inhibitory effect exerted by heavy metal ions,e.g.copper ion,when its concentration rose to as high as 20 mg/L,as a result,the sulfate reduction rate was brought down to 48.2%.According to the experiment,inhibitory rating of the above heavy metals was Ni CuCdHg.In addition,due to the fact that COD in the wastewater sample decreased when sulfate being removed,relationship between COD reduction and sulfate reduction rate (WCOD/WSO42-) was studied in this paper.
【Fund】: 广东省-国家自然科学基金联合基金(U0633001);; 广东省科技项目(2009B030802017、2010B030900008);; 广东省教育厅育苗工程项目(20102002);; 广州市珠江科技新星项目;; “工业聚集区污染控制与生态修复”教育部重点实验室开放基金项目
【CateGory Index】: X703
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