Characterization of apparent sulfur oxidation activity of thermophilic archaea in bioleaching of chalcopyrite  

古菌生物浸出黄铜矿过程中的表观硫氧化活性表征(英文)

作　　者：朱薇[1,2] 夏金兰[1,2] 彭安安[1,2] 聂珍媛[1,2] 邱冠周[1,2] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083 [2]中南大学生物冶金教育部重点实验室,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第8期2383-2388,共6页中国有色金属学报（英文版）

基　　金：Project(50974140) supported by the National Natural Science Foundation of China;Project(20090162110054) supported by Specialized Research Fund for the Doctoral Program of Higher Education of China

摘　　要：The apparent sulfur oxidation activities of four pure thermophilic archaea, Acidianus brierleyi （JCM 8954）, Metallosphaera sedula （YN 23）, Acidianus manzaensis （YN 25） and Sulfolobus metallicus （YN 24） and their mixture in bioleaching chalcopyrite were compared, which were characterized indirectly by the evolution of the cells concentration, pH value and sulfate ions concentration in solution. The results show that the mixed culture contributed significantly to the raising of leaching rate, which suggests that the mixed culture had a higher sulfur oxidation activity than the pure culture. Meanwhile, the results also indicate that the changes of parameters characterizing the sulfur oxidation activity of thermophilic archaea are often influenced by many factors, so it is hard to reflect accurately the specific sulfur oxidation activities among the different sulfur-oxidizing microbes when bioleaching chalcopyrite at different conditions. Accordingly, an efficient method to characterize microbial sulfur oxidation activity appears to be desirable.对4株纯的极端嗜热古菌及它们的混合菌在生物浸出黄铜矿过程中的硫氧化活性进行对比研究。结果表明,混合菌比纯菌拥有更高的硫氧化活性,它大幅度促进黄铜矿浸出率的提高。表征嗜热古菌硫氧化活性的参数值通常受很多因素的影响,以致在不同的硫氧化菌和不同的条件下生物浸出黄铜矿时,这些参数很难准确地反映出相应的硫氧化活性。因此,期待找到一种能有效表征浸矿菌硫氧化活性的方法。

关 键 词：thermophilic archaea sulfur oxidation activity CHARACTERIZATION BIOLEACHING 

分 类 号：TF18[冶金工程—冶金物理化学]