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Pseudomonas sp.QJX-1的锰氧化特性研究 被引量:6

Characterization of Manganese Oxidation by Pseudomonas sp. QJX-1
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摘要 从锰矿土壤样品中分离、纯化出1株高效锰氧化细菌(QJX-1),经16S rDNA序列鉴定为Pseudomonas sp.QJX-1.研究表明,Pseudomonas sp.QJX-1含有锰氧化的必需成分多铜氧化酶基因CumA,当初始Mn2+为5.05 mg·L-1,菌密度D600为0.020时,该菌可在48 h内将Mn2+转化,且转化率高达99.4%.在寡营养条件下该菌锰氧化速率较富营养条件下有显著提高;添加石英砂滤料促使生物膜的快速形成,进而促进Mn2+的生物转化.根据研究结果推测地下水处理过程中生物锰氧化速率较快. A manganese-oxidizing bacteria ( QJX- 1 ) was isolated from the soil of a manganese mine. It was identified as Pseudomonas sp. QJX-1 by 16S rDNA sequencing. Experimental results showed that the Pseudomonas sp. QJX-1 has a multi-copper oxidase gene CumA, which is an essential component for manganese oxidation by Pseudomonas sp. Under the condition of low initial inoculum level (D600, 0.020), 5.05 mg·L-1 Mn2+ could be oxidized by QJX-1 within 48 h with a conversion rate of as high as 99.4%. In comparison with the eutrophic conditions, the oligotrophic condition dramatically increased the biological manganese oxidation rate. Biofilm formation by employing the quartz sand could further improve the oxidation rate of Mn2+. Based on these results, it is speculated that biological manganese oxidation in underground water treatment is comparatively high.
出处 《环境科学》 EI CAS CSCD 北大核心 2014年第2期740-745,共6页 Environmental Science
基金 国家自然科学基金项目(41171377) 中国科学院知识创新工程重要项目(KZCX2-EW-410)
关键词 PSEUDOMONAS SP QJX-1 生物锰氧化 寡营养 石英砂 生物膜 Pseudomonas sp. QJX- 1 biological manganese oxidation oligotrophic quartz sand biofilm
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