| 重金属镉在土壤中的迁移及形态分布研究 |
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| 引用本文： | 金焰,陈锋,李立忠,张秀.重金属镉在土壤中的迁移及形态分布研究[J].环境科学与技术,2011(Z2):447-450. |
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| 作者姓名： | 金焰 陈锋 李立忠 张秀 |
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| 作者单位： | 湖北黄石环境监测站;中南民族大学 |
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| 摘 要： | 通过动态淋溶实验,研究了外源可溶性重金属镉(Cd)在土壤中的迁移,结果表明,淋溶液pH=2.0时,Cd迅速移出土柱,500 mL时即达到最大值。pH=6.0时,镉移出缓慢,1 300 mL时才达到最大值。且81.3%的外源Cd吸附在0~10 cm土层。形态分布研究表明:黄石土壤中镉的存在形态主要是铁锰结合态和残渣态,分别占全量的74.6%、66.1%。随土壤中Cd负荷提高,土壤中交换态、有机态、碳酸盐结合态镉的比例增大。
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| 关 键 词： | 重金属镉 迁移 形态分布 |
Study on the Transportation and Speciation of Heavy Metal Cadmium in Soil |
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| JIN Yan,CHEN Feng,LI Li-zhong,ZHANG Xiu.Study on the Transportation and Speciation of Heavy Metal Cadmium in Soil[J].Environmental Science and Technology,2011(Z2):447-450. |
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| Authors: | JIN Yan CHEN Feng LI Li-zhong ZHANG Xiu |
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| Institution: | 1(1.Huangshi Environmental Monitoring Station,Huangshi 435003 China; 2.South-Central University for Nationalities,Wuhan 430074,China) |
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| Abstract: | The transportation and speciation of heavy metal cadmium in soil have been investigated using the dynamic leaching.The results showed that the maximum cadmium in soil can fast be eluted at a 500 mL pH 2.0 leaching solution,while those are slowly dissolved at a 1300 mL pH 6.0 leaching solution,and 81.3% heterogonous cadmium consist in the layer of 0~10cm.The data indicated that the main speciation of cadmium in huangshi soil is in the bounded Fe-Mn and residue form,and the contents of the bounded Fe-Mn and residue form are calculated to be 74.6% and 66.1%,respectively.With the increase of the Cd burden,the contents of the bounded cadmium in the form of exchange,organic and carbonate are increased. |
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| Keywords: | heavy metals cadmium transportation speciation |
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