| 添加钠基蒙脱石对重金属污染红壤的影响 |
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| 引用本文： | 林云青,章钢娅,龚华.添加钠基蒙脱石对重金属污染红壤的影响[J].安徽农业科学,2009,37(21). |
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| 作者姓名： | 林云青 章钢娅 龚华 |
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| 作者单位： | 1. 土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,江苏南京,210008;中国科学院研究生院,北京,100049
2. 土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,江苏南京,210008 |
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| 基金项目： | 国家重点基础研究发展规划(973)项目，中国科学院知识创新工程重要方向项目 |
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| 摘 要： | 目的]研究添加钠基蒙脱石对重金属污染红壤中Cu、Zn、Pb和Cd的改良效应。方法]以采自江西贵溪铜尾矿污染红壤为样品,通过室内恒温培养试验,设5个处理(添加钠基蒙脱石0、1%、2%、4%、8%),测定处理后各样品的土壤有效态重金属含量、水浸提液的Na+、电导率及pH值,分析它们之间相关性。结果]添加4%和8%的钠基蒙脱石能显著降低重金属污染红壤中有效态Cu、Zn、Pb和Cd的含量,与对照相比,分别降低33.8%和40.2%、33.2%和37.2%、28.4%和32.7%、35.7%和34.5%;随钠基蒙脱石添加量的增加,土壤水浸提液的Na+和电导率以及土壤的pH值逐渐升高。结论]钝化机理分析表明,重金属污染土壤添加钠基蒙脱石使土壤的pH值升高,增加土壤的吸附性能,使重金属离子与钠基蒙脱石中的Na+发生了置换反应。
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| 关 键 词： | 钠基蒙脱石 有效态重金属 Na+ 电导率 |
Effects of Adding Na-montmorillonite on Red Soil Polluted by Heavy Metals |
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| LIN Yun-qing et al.Effects of Adding Na-montmorillonite on Red Soil Polluted by Heavy Metals[J].Journal of Anhui Agricultural Sciences,2009,37(21). |
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| Authors: | LIN Yun-qing |
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| Institution: | LIN Yun-qing et al (State Key Laboratory of Soil , Sustainable Agricultural Development,Nanjing Institute of Soil Science,Chinese Academy of Sciences,Nanjing,Jiangsu 210008) |
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| Abstract: | Objective] The purpose was to study the modified effect of Na-montmorillonite on Cu,Zn,Pb and Cd in heavy metal polluted red soil.Method] In the indoor experiment by constant temperature culture,with polluted red soil from the Guixi Copper Tailings in Jiangxi Province as samples,5 treatments of adding 1%,2%,4% and 8% Na-montmorillonite and non-adding Na-montmorillonite were set up,the available heavy metal,Na+ in water extract,electric conductivity and pH in soil from each sample were measured and their c... |
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| Keywords: | Na+ Na-montmorillonite Available heavy metals Na+ Electric conductivity |
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