生物催化氧化锰和黄铁矿的共同浸出  

Co-Leaching of Manganese Oxide and Pyrite Catalyzed by Microorganisms

作　　者：冯雅丽[1] 刘欣伟[1] 李浩然[2] 张士元[1] 杨志超[1] 蔡震雷[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100190

出　　处：《高校化学工程学报》2014年第5期1065-1070,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金资助项目(21176242;21176026);国家863计划(012AA062401);国家支撑项目(2012AA062401);国际海底专项(DY125-15-T-08)

摘　　要：为了探索在微生物存在的条件下氧化锰和硫化矿共同浸出的特点,进行了氧化亚铁硫杆菌在好氧和厌氧条件下对FeS2-MnO2-H2SO4体系的催化浸出实验研究。结果表明,在好氧条件和厌氧条件下,氧化亚铁硫杆菌均可以催化FeS2-MnO2-H2SO4体系的浸出。好氧条件下利于FeS2的浸出,浸出36 h时,在MnO2:FeS2质量比为1:1、5:1、6:1时的浸出率分别为:25.34%、82.89%和82.58%。厌氧条件下,利于MnO2的浸出,浸出36 h时,在MnO2:FeS2质量比为1:1、5:1、6:1时的浸出率分别为:87.76%、85.35%和75.09%。浸出机理是氧化亚铁硫杆菌催化铁离子在二价和三价之间的循环转化,根据实验结果提出了好氧和厌氧条件下,FeS2-MnO2-H2SO4体系的两矿反应模型。In order to explore the co-leaching performance of manganese oxide and sulfide ore in the presence of microorganisms, aerobic and anaerobic leaching experiments with Thiobacillus ferrooxidans were studied on a FeS2-MnO2-H2SO4 system. The results show that Thiobacillus ferrooxidans can catalyze the FeS2-MnO2-H2SO4 leaching under both aerobic and anaerobic conditions. However, FeS2 was more easily leached under aerobic conditions. The FeS2 leaching rate is 25.34%, 82.89%and 82.58%when proportions of 1：1, 5：1 and 6：1 are used after 36 h respectively. MnO2 was more easily leached under anaerobic conditions, and the MnO2 leaching rate is 87.76%, 85.35% and 75.09% when proportions of 1：1, 5：1, 6：1 are used after 36 h respectively. The leaching mechanism is the transformation between Fe2＋ and Fe3＋ catalyzed by Thiobacillus ferrooxidans. Based on the experimental results under aerobic and anaerobic conditions, a FeS2-MnO2-H2SO4 mineral reaction model is proposed.

关 键 词：黄铁矿 氧化亚铁硫杆菌 好氧浸出 厌氧浸出 

分 类 号：Q935[生物学—微生物学]