| 人工湿地植物处理含重金属生活废水的实验研究 |
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| 引用本文： | 陈明利,张艳丽,吴晓芙,纪智慧.人工湿地植物处理含重金属生活废水的实验研究[J].环境科学与技术,2008,31(12). |
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| 作者姓名： | 陈明利 张艳丽 吴晓芙 纪智慧 |
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| 作者单位： | 中南林业科技大学资源与环境学院,湖南,长沙,410004 |
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| 基金项目： | 国家林业部"948"资助项目
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湖南省教育厅产业化推广项目
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| 摘 要： | 通过耐受浓度试验得出凤眼莲、水蕹、水花生和荇菜四种植物对含重金属生活污水中Cd2+的耐受范围值分别<5mg/L、0.5mg/L、0.2mg/L、0.2mg/L;凤眼莲和水花生对Zn2+的耐受范围值分别<10mg/L,水蕹和荇菜对Zn2+耐受范围值为<5mg/L和0.5mg/L。由植物对生活污水中锌\镉离子去除率试验可知,在Cd2+/Zn2+浓度分别为0.5mg/L和5mg/L时,与对照组相比,两种植物均能明显去除污水中的Zn2+与Cd2+,其中Cd2+去除率提高了65.3%,Zn2+去除率提高了43.7%。研究发现植物处理在前5d内为去除Zn2+/Cd2+的高效区间,这一时期内植物对Zn2+/Cd2+去除率的贡献可以达到40%～60%,表明在植物的耐受浓度范围内,湿地植物对生活污水中的Cd2+/Zn2+有较好的去除效果,根部为主要的富集器官。
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| 关 键 词： | 人工湿地 植物 锌 镉 去除率 生活污水 |
Characteristics of Selected Wetland Plant Species for Removal of Zn~(2+)/Cd~(2+) from Wastewater |
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| CHEN Ming-li,ZHANG Yan-li,WU Xiao-fu,JI Zhi-hui.Characteristics of Selected Wetland Plant Species for Removal of Zn~(2+)/Cd~(2+) from Wastewater[J].Environmental Science and Technology,2008,31(12). |
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| Authors: | CHEN Ming-li ZHANG Yan-li WU Xiao-fu JI Zhi-hui |
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| Institution: | CHEN Ming-li,ZHANG Yan-li,WU Xiao-fu,JI Zhi-hui (School of Resource , Environment,Central South University of Forestry , Technology,Changsha 410004,China) |
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| Abstract: | Experiments were carried out to test the ability of four selected plant species introduced into a constructed wetland system for removal of Zn2+ and Cd2+ from municipal wastewater mixed with lab wastewater. The highest concentration limit of Cd2+ that the selected species could endure was found to be 5, 0.5, 0.2 and 0.2mg/L respectively, for Eichhornia crassipes, Ipomoea aquatica, Alternanthera philoxeroide and Nymphoides peltatum, while that of Zn2+ was 10mg/L for Eichhornia crassipes and Alternanthera phi... |
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| Keywords: | constructed wetland plant Zn2+ Cd2+ removal rate wastewater |
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