东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

Bio-oxidation of pyrite, chalcopyrite and pyrrhotite by Acidithiobacillus ferrooxidans

ISSN号：1001-6538
期刊名称：科学通报(英文版)
时间：0
页码：2702-2714
语言：中文
分类：TD85[矿业工程—金属矿开采;矿业工程—矿山开采]
作者机构：[1]Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China, [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China
相关基金：Supported by the National Natural Science Foundation of China （Grant Nos. 40532011,40403004 and 40473032）, the Important Direction Project of Knowledge Innovation Program of the Chinese Academy of Sciences （Grant No. KZCX3- SW-223）. Special thanks go to Dr. Li Yiliang of University of Georgia, USA, Pro. Miao Desui of Kansas State University, USA and other two anonymous reviewers for the valuable suggestions.
相关项目：胡安·德富卡洋脊Endeavour段热液生态环境变化与地球化学制约机理研究

作者： Jiang Lei|Zhou HuaiYang|Peng XiaoTong|

关键词：黄铁矿, 黄铜矿, 磁黄铁矿, 氧化作用, Acidithiobacillus ferrooxidans, pyrite, chalcopyrite, pyrrhotite, bio-oxidation

中文摘要：

这篇论文由黄铁矿，黄铜矿和磁黄铁矿的 Addithiobadllus ferrooxidans 处理简历氧化过程。我们的试验性的结果为三种硫化物矿物质显示出特殊简历氧化特征。面对 A。ferrooxidans，硫化物氧化率通常在磁黄铁矿，黄铜矿和黄铁矿的顺序减少。酸碱值在黄铁矿的简历氧化期间趋于总体上减少，而一个上升秋天模式在他们的酸碱值变化为黄铜矿和磁黄铁矿被记录。没有免职在黄铁矿的简历氧化期间被观察，建议一个可能的连接降低在这个过程的酸碱值价值。然而，大量 jarosite 和元素硫在黄铜矿和磁黄铁矿的简历氧化过程被决定。A。ferrooxidans 个人在黄铁矿的光滑的表面上作为附件直接被发现到侵蚀坑。侵蚀坑类似于在形状和长度的细菌，并且因此可能是房间在矿物质表面上分泌的有机酸的溶解的产品。更复杂地，简历电影在黄铜矿和磁黄铁矿的表面上存在。A 的这类结构化的社区。ferrooxidans 在细胞外的聚合物质(EPS ) 被围住，并且用免职在黄铜矿和磁黄铁矿的简历氧化过程产生了盖住。黄铁矿，黄铜矿和磁黄铁矿的不同简历氧化进程可以在简历氧化系统的反应解决方案主要被连接到单个矿物质和 thepH 的特征。

英文摘要：

This paper deals with the bio-oxidation processes by Acidithiobacillus ferrooxidans of pyrite, chalcopyrite and pyrrhotite. Our experimental results show distinctive bio-oxidation characteristics for the three sulfide minerals. In the presence of A. ferrooxidans, the sulfide oxidation rates generally decrease in the order of pyrrhotite, chalcopyrite and pyrite. The pH during bio-oxidation of pyrite tends to decrease as a whole, whereas a rise-fall pattern was recorded for both chalcopyrite and pyrrhotite in their pH variations. No deposition was observed during the bio-oxidation of pyrite, suggesting a possible link to lower pH value in the process. However, large amounts of jarosite and element sulfur were determined in the bio-oxidation processes of chalcopyrite and pyrrhotite. A. ferrooxidans individuals were found directly as attachments to erosion pits on the smooth surface of pyrite. The erosion pits are similar to the bacterium in shape and length, and thus are probably products of dissolution of organic acid secreted by the cells on the mineral surface. More complicatedly, biofilm exists on the surfaces of chalcopyrite and pyrrhotite. This type of structured community of A. ferrooxidans is enclosed in the extracellular polymeric substances （EPS）, and covered with the deposition generated in the bio-oxidation processes of chalcopyrite and pyrrhotite. Different bio-oxidation processes of pyrite, chalcopyrite and pyrrhotite may be linked mainly to characteristics of individual minerals and the pH in the reaction solution of the bio-oxidation system.

同期刊论文项目