• 关键词：烟草头孢霉F2  氯化汞  消毒  还原  元素汞

• 基金项目：国家自然科学基金资助项目

• 王保军
• 中国科学院微生物研究所, 北京 100080

• 杨惠芳
• 中国科学院微生物研究所, 北京 100080

• 李文忠
• 中国科学院微生物研究所, 北京 100080

• 摘要：烟草头孢霉F₂在含200mg/L HgCl₂的液体培养基中生长16h,汞量减少了90％,此后菌量迅速增加,试验了营养条件、HgCl₂浓度、前培养条件、pH及温度等对F₂菌汞解毒作用的影响,初步研究了解毒作用机理.结果表明,该菌能将HgCl₂还原成为元素汞,据分析,约12％的汞挥发到气相中,7％被菌体吸收,其余以元素汞颗粒的形态沉积在培养液底部.

• Abstract：After 16 hours growing of a mercury-resistant fungus, Cephalosporium ta-bacinum, in a liquid medium containing 200mg/L HgCl₂, the concentration of HgCl₂ reduced 90% and a rapid growth of the fungus was followed. The effects of nutrients, concentration of Hg, precultivation condition, pH, and temperature on the detoxification and the mechanism of the detoxification were investigated. The results indicated that the strain is able to reduce HgCl₂ to elemental mercury and 12% of Hg was evaporated, 7% of Hg was uptaken by the cells and the rest was precipitated into the bottom as elemental mercury granules.

• Key words：Cephalosporium tabacinum F2  detoxification  reduction  element mercury

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