氧化亚铁硫杆菌突变株对Fe2+及SO32-的氧化研究
Study on the Oxidation of Ferrous Iron and Sulfite by Acidithiobacillus Ferrooxidans Mutant Strain
作者：王向东(四川大学 建筑与环境学院，国家烟气脱硫工程技术研究中心,四川 成都 61006)；蒋文举(四川大学 建筑与环境学院，国家烟气脱硫工程技术研究中心,四川 成都 61006)；刘晓燕(四川大学 建筑与环境学院，国家烟气脱硫工程技术研究中心,四川 成都 61006)
Author：(School of Architecture and Environment, National Eng. Research Center for Flue Gas Desulphurization, Sichuan Univ., Chengdu 610065, China)；(School of Architecture and Environment, National Eng. Research Center for Flue Gas Desulphurization, Sichuan Univ., Chengdu 610065, China)；(School of Architecture and Environment, National Eng. Research Center for Flue Gas Desulphurization, Sichuan Univ., Chengdu 610065, China)
收稿日期：2006-05-20 年卷（期）页码：2007,39(2):82-86
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：氧化亚铁硫杆菌；突变菌株；亚铁离子；亚硫酸盐
Key words：Acidithiobacillus ferrooxidan; mutant strain; ferrous; iron sulfite
基金项目：国家自然科学基金资助项目(50278059)
中文摘要
利用紫外线对氧化亚铁硫杆菌(Acidithiobacillus ferrooxidans)进行诱变处理，获得了对SO32-和Fe2+具有较高转化效率的突变菌株。结果表明，突变菌株将Fe2+完全氧化所需时间从诱变前的48 h缩短为24 h，并且具有较宽酸碱度适应范围。在突变菌株与Fe2＋共存时，SO32－的氧化速率明显高于化学氧化，且以间接氧化为主，细菌对Fe2＋的氧化是反应过程的限制步骤。当SO32－的初始浓度为2.7 g·L－1、Fe2＋的浓度为0.43 g·L－1时，SO32－的转化速率为0.0153 g·L－1·min－1。
英文摘要
Acidithiobacillus ferrooxidans was treated by UV to obtain a mutant strain which has a high conversion efficiency of SO32- and Fe2+. The results showed that the mutant strain reduces the time for the perfect conversion of Fe2+ from 48 hours to 24 hours. The biological oxidation rate of SO32－ was obviously higher than the chemical oxidation rate when Fe2＋coexisted with the mutant strain. The bacteria did not directly oxidate SO32－, and the oxidization of Fe2+ by the bacteria seemed to be the key step of oxidation of SO32-. The conversion rate of SO32－ was 0.0153 g·L－1·min－1when the initial concentration of SO32－and Fe2+ was 2.7 g·L－1 and 0.43 g·L－1, respectively .
【关闭】
