Effect of chloride ion on bacterial pre-oxidation of arsenic-containing gold concentrate  

作　　者：杨玮 覃文庆 刘瑞强 任允超 

机构地区：[1]School of Resources Processing and Bioengineering,Central South University [2]Refinery of Shandong Gold Mining Co.,Ltd. [3]Engineering Design and Research Co.,Ltd.,Shandong Gold Corporation

出　　处：《Journal of Central South University》2011年第5期1418-1424,共7页中南大学学报（英文版）

基　　金：Project(2007AA060902) supported by the National High Technology Research and Development Program of China;Project(2010CB630905) supported by the National Basic Research Program of China

摘　　要：The bacterial pre-oxidation process of arsenic-containing gold concentrates and the bacterial activity under different chloride ion concentrations were studied by using a mixture of thermophilic strains TCJ domesticated in production.The experimental result shows that with different samples and leaching systems,the adaptability and Cl- tolerance of bacteria are different,and that appropriate chloride ion concentration is conductive to bacterial oxidation,while higher chloride ion concentration will inhibit the bacterial activity and affect the pre-oxidation performance.Under the present production conditions,TCJ can adapt to the changes of water quality in the source of water and its critical chloride ion tolerance value is 2.7 g/L.The bacterial pre-oxidation process of arsenic-containing gold concentrates and the bacterial activity under different chloride ion concentrations were studied by using a mixture of thermophilic strains TCJ domesticated in production. The experimental result shows that with different samples and leaching systems, the adaptability and Cl^- tolerance of bacteria are different, and that appropriate chloride ion concentration is conductive to bacterial oxidation, while higher chloride ion concentration will inhibit the bacterial activity and affect the pre-oxidation performance. Under the present production conditions, TCJ can adapt to the changes of water quality in the source of water and its critical chloride ion tolerance value is 2.7 g/L.

关 键 词：chloride ions arsenic-containing gold concentrate PRE-OXIDATION bacterial adaptation critical concentration 

分 类 号：TD925.5[矿业工程—选矿]