| 生物氧化锰矿物对几种重金属的吸附作用 |
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| 引用本文： | 金圣圣,贺纪正,郑袁明,孟佑婷,张丽梅.生物氧化锰矿物对几种重金属的吸附作用[J].环境科学学报,2009,29(1):132-139. |
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| 作者姓名： | 金圣圣 贺纪正 郑袁明 孟佑婷 张丽梅 |
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| 作者单位： | 1. 中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京,100085;中国科学院研究生院,北京,100049
2. 中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京,100085 |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程青年人才领域前沿项目，中国科学院生态环境研究中心青年人才专项基金 |
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| 摘 要： | 从土壤铁锰结核及其附近土壤中分离、培养并筛选到3株锰氧化细菌:芽孢杆菌(Bacillus sp.)WH4和GY16,假单胞菌(Pseudomonas sp.)WHS26,应用这3个菌株大量合成了生物氧化锰.在此基础上,比较研究了这3个菌株催化合成的生物氧化锰与一种化学合成锰氧化物矿物(S-MnOx:Synthesized Mn oxide)对重金属Cu2+、Zn2+、Cd2+的吸附特征.结果表明,3种生物氧化锰对重金属的吸附具有明显优势,其对Cu2+、Zn2+、Cd2+的最大吸附量约为S-MnO2的10～100倍;各种氧化锰对Cu2+、Zn2+、Cd2+的吸附过程均符合Langmuir等温吸附模型,且是一个快速吸附的过程;3种锰氧化物对Cu2+、Zn2+、Cd2+3种重金属的最大吸附量与其比表面积呈正相关,吸附过程受pH影响,最适的pH范围为3～6.
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| 关 键 词： | 生物氧化锰 锰氧化细菌 土壤 铁锰结核 吸附 重金属 |
| 收稿时间： | 3/28/2008 3:25:05 PM |
| 修稿时间： | 5/26/2008 3:20:37 PM |
Adsorption of heavy metals by biogenic manganese oxides |
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| JIN Shengsheng,HE Jizheng,ZHENG Yuanming,MENG Youting and ZHANG Limei.Adsorption of heavy metals by biogenic manganese oxides[J].Acta Scientiae Circumstantiae,2009,29(1):132-139. |
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| Authors: | JIN Shengsheng HE Jizheng ZHENG Yuanming MENG Youting and ZHANG Limei |
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| Institution: | JIN Shengsheng1,2,HE Jizheng1,ZHENG Yuanming1,MENG Youting1,ZHANG Limei1,1.State Key Laboratory of Urban , Regional Ecology,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 1000852.Graduate University of the Chinese Academy of Sciences,Beijing 100049 |
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| Abstract: | Microbially mediated manganese(Mn) oxidation is a key process in the biogeochemical cycling of Mn,and is responsible for the formation of Mn oxide minerals.Biogenic Mn oxides are highly reactive,have a huge surface area and a nanocrystalline structure.In this study,three strains of bacteria with high Mn-oxidizing activity were isolated from iron-manganese nodules and their surrounding soil and identified as Bacillus sp.WH4,GY16,and Pseudomonas sp.WHS26.Biogenic Mn oxides produced by these three bacteria and... |
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| Keywords: | manganese oxides manganese-oxidizing bacteria soil iron-manganese nodules adsorption heavy metals |
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