Kocaman Ayse Tuba, Cemek Mustafa, Edwards Katrina Jane
a Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA.
b Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Yildiz Technical University, 34210 Esenler, Istanbul, Turkey.
Can J Microbiol. 2016 Aug;62(8):629-42. doi: 10.1139/cjm-2016-0085. Epub 2016 Mar 29.
The main objective of this study was to investigate the dissolution kinetics of pyrite, pyrrhotite, and chalcopyrite. Crushed minerals were reacted with Acidithiobacillus ferrooxidans (25 °C). The kinetics of dissolution was investigated by monitoring pH and Fe(2+) and Fe(3+) ion concentrations in the leaching solutions. Pyrite, pyrrhotite, and chalcopyrite dissolution by A. ferrooxidans was found to be a chemically controlled process. With bacteria, the dissolution rates of the minerals increased in the order of pyrrhotite, pyrite, and chalcopyrite. The number of cells attached to mineral surfaces increased in the same order. Acidithiobacillus ferrooxidans was found to enhance the dissolution rates of the minerals. The acid-insoluble trait of pyrite and acid-soluble trait of the other 2 minerals affected the pH changes in the leaching solutions.
本研究的主要目的是研究黄铁矿、磁黄铁矿和黄铜矿的溶解动力学。将粉碎后的矿物与氧化亚铁硫杆菌（25℃）进行反应。通过监测浸出溶液中的pH值以及Fe(2+)和Fe(3+)离子浓度来研究溶解动力学。发现氧化亚铁硫杆菌对黄铁矿、磁黄铁矿和黄铜矿的溶解是一个化学控制过程。有细菌存在时，矿物的溶解速率按磁黄铁矿、黄铁矿和黄铜矿的顺序增加。附着在矿物表面的细胞数量也按相同顺序增加。发现氧化亚铁硫杆菌可提高矿物的溶解速率。黄铁矿的酸不溶性特征以及其他两种矿物的酸溶性特征影响了浸出溶液中的pH变化。
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