| Pseudomonas sp. QJX-1的锰氧化特性研究 |
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| 引用本文： | 周娜娜,柏耀辉,梁金松,罗金明,刘锐平,胡承志,袁林江.Pseudomonas sp. QJX-1的锰氧化特性研究[J].环境科学,2014,35(2):740-745. |
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| 作者姓名： | 周娜娜 柏耀辉 梁金松 罗金明 刘锐平 胡承志 袁林江 |
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| 作者单位： | 西安建筑科技大学环境与市政工程学院, 西安 710055;中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;中国科学院生态环境研究中心环境水质学国家重点实验室, 北京 100085;西安建筑科技大学环境与市政工程学院, 西安 710055 |
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| 基金项目： | 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） |
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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.
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| 关 键 词： | Pseudomonas sp.QJX-1 生物锰氧化 寡营养 石英砂 生物膜 |
| 收稿时间： | 6/7/2013 12:00:00 AM |
| 修稿时间： | 2013/7/22 0:00:00 |
Characterization of Manganese Oxidation by Pseudomonas sp. QJX-1 |
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| ZHOU Na-n,BAI Yao-hui,LIANG Jin-song,LUO Jin-ming,LIU Rui-ping,HU Cheng-zhi and YUAN Lin-jiang.Characterization of Manganese Oxidation by Pseudomonas sp. QJX-1[J].Chinese Journal of Environmental Science,2014,35(2):740-745. |
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| Authors: | ZHOU Na-n BAI Yao-hui LIANG Jin-song LUO Jin-ming LIU Rui-ping HU Cheng-zhi and YUAN Lin-jiang |
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| Institution: | School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China |
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| Abstract: | 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. |
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| Keywords: | Pseudomonas sp QJX-1 biological manganese oxidation oligotrophic quartz sand biofilm |
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