Volatilization and Recovery of Mercury from the Mercury-Polluted Soil Using Mercury-Resistant Strains of Acidithiobacillus ferrooxidans

耐汞菌株氧化亚铁硫杆菌对汞污染土壤中汞的挥发和回收

基本信息

批准号：
14580589
负责人：
TAKEUCHI Fumiaki
金额：
$ 2.05万
依托单位：
OKAYAMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Acidithiobacillus ferrooxidans inhabits drainage in acid mines and plays a crucial role in the bacterial leaching of sulfide ores. A.ferrooxidans strains that have a high iron-oxidizing activity in the environment with many kinds of and high concentrations of heavy metals are required for microbiological leaching of low grade ores. A.ferrooxidans SUG 2-2 was isolated as a mercury-resistant strain among one hundred fifty A.ferrooxidans strains isolated from the natural environments. Interestingly, A.ferrooxidans SUG 2-2 has not only NADPH-dependent mercury reductase activity but also Fe^<2+>-dependent mercury reductase activity in the cells and cytochrome c oxidase purified from strain SUG 2-2 volatilizes mercury in the presence of Fe^<2+>Although there are both advantages and disadvantages to the use of bioremediation, this technology has become more important in cleaning up and protecting the environment. This Study describes the development of a new bioremediation method, which uses strains from an acidophilic, chemolithotrophic, iron-oxidizing bacterium Acidithiobacillus ferrooxidans. The bacterial strains decomposed and recovered metal mercury from mercury-polluted soil and wastewater.In this Study, the author shows that mercury resistant A. ferrooxidans strains have a unique mercury volatilization system in the cells and are useful for the practical use for the bioremediation of mercury polluted soil and wastewater under acidic conditions. Although there are both advantages and disadvantages to the use of bioremediation technique, this ecologically sound natural process seems to become more important in cleaning up and protecting the environment.

酸硫代杆菌铁氧化物居住在酸性矿石中的排水中，在硫化物矿石的细菌浸出中起着至关重要的作用。 A.在环境中具有高铁氧化活性的铁毒素菌株，低级矿石的微生物浸出需要多种浓度和高浓度的重金属。 A.叶铁氧化物SUG 2-2被分离为从自然环境分离的一百五十叶铁氧体菌株中的一种抗汞菌株。有趣的是，A. ferrooxidans Sug 2-2不仅具有NADPH依赖性的汞还原酶活性，而且还具有Fe^<2+> - 依赖性的汞还原酶在细胞和细胞色素c氧化酶中的活性，从菌株中纯化的菌株纯化了2-2的含量，尽管在这种情况下具有更重要的优势，并且在这种情况下具有更重要的作用，并且在这种情况下具有更重要的作用，并且存在着更重要的范围。环境。这项研究描述了一种新的生物修复方法的发展，该方法使用了酸性，化学杀菌性的，铁氧化细菌酸硫硫代硫醇的菌株。细菌菌株从汞污染的土壤和废水中分解并回收了金属汞。在这项研究中，作者表明，抗汞抗性的铁氧动物菌株在细胞中具有独特的汞挥发系统，可用于实际使用，可用于在酸化污染土壤和在酸性条件下的汞污染的物质化。尽管使用生物修复技术既有优势又有缺点，但这种自然的自然过程似乎在清理和保护环境方面变得越来越重要。