| 污染土壤中重金属的可萃取性与生物可利用性 |
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| 引用本文： | 马毅红,易筱筠,党志揪.污染土壤中重金属的可萃取性与生物可利用性[J].华南理工大学学报(自然科学版),2002,30(12):93-96. |
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| 作者姓名： | 马毅红 易筱筠 党志揪 |
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| 作者单位： | 华南理工大学,应用化学系,广东,广州,510640 |
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| 基金项目： | 国家自然科学基金资助项目 (498730 33)，广东省环保局科技基金资助项目 (2 0 0 1- 2 7) |
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| 摘 要： | 采用5种常用的单一萃取剂进行污染土壤中重金属元素Cu、Pb、Zn和Cd可萃取性研究。结果发现：中性盐CaCl2和NaNO3的萃取效率远低于其它三种具有络合（HOAc、NH4OAc）或螯合（EDTA）性质的单一萃取剂；污染土壤中生长的农作物（玉米和土豆）体内重金属含量也高于中性盐CaCl2和NaNO3从土壤中萃取出来的量。这说明植物不仅可以吸收和利用土壤中以可交换形式存在的这一部分重金属，而且它们也可利用以其它形式存在的重金属。
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| 关 键 词： | 污染土壤 重金属 可萃取性 生物可利用性 化学形态 环境迁移能力 |
| 文章编号： | 1000-565X(2002)12-0093-04 |
| 修稿时间： | 2002年4月2日 |
Extractability and Bioavailability of Heavy Metals in Surface Soil Derived from Smelting Zinc |
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| Ma Yi_hong,Yi Xiao_yun,Dang Zhi.Extractability and Bioavailability of Heavy Metals in Surface Soil Derived from Smelting Zinc[J].Journal of South China University of Technology(Natural Science Edition),2002,30(12):93-96. |
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| Authors: | Ma Yi_hong Yi Xiao_yun Dang Zhi |
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| Abstract: | Five different single extractants were used to evaluate the chemical mobility of heavy metals in polluted soil. Results indicate that the extraction efficiency of neutral salts, such as CaCl 2 and NaNO 3, is much less than those compounds, which have coordinating groups, for example, HOAc, NH 4OAc and EDTA. Meanwhile, the content of heavy metals in crops growing in the polluted soil is higher than the concentration extracted with neutral salts. This imply crops can absorb not only those metals existing as exchangeable bound, but also existing as other chemical forms. |
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| Keywords: | polluted soil heavy metals extractability bioavailability |
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