| 土壤重金属化学形态的生物可利用性评价 |
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| 引用本文： | 雷鸣,廖柏寒,秦普丰.土壤重金属化学形态的生物可利用性评价[J].生态环境,2007,16(5):1551-1556. |
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| 作者姓名： | 雷鸣 廖柏寒 秦普丰 |
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| 作者单位： | 1. 湖南农业大学资源环境学院,湖南,长沙,410128
2. 中南林业科技大学国际学院,湖南,长沙,410004 |
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| 摘 要： | 重金属化学形态是近年来土壤化学、植物营养和环境科学研究领域的一个热点和难点,利用重金属的化学形态分布和含量变化来评价重金属的生物可利用性,有利于全面研究重金属的危害性和治理重金属污染土壤。结果表明,水溶态和交换态的重金属易被生物吸收利用,而残留态重金属一般不被生物利用,其它形态如碳酸盐结合态、铁锰氧化物结合态和有机物结合态的生物可利用性主要取决于外界环境的变化。
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| 关 键 词： | 牛物可利用性 化学形态 污染土壤 重金属 |
| 文章编号： | 1672-2175（2007）05-1551-06 |
| 收稿时间： | 2007-03-12 |
| 修稿时间： | 2007年3月12日 |
Assessment of bioavailability of heavy metal in contaminated soils with chemical fractionation |
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| LEI Ming,LIAO Bohan,QIN Pufeng.Assessment of bioavailability of heavy metal in contaminated soils with chemical fractionation[J].Ecology and Environmnet,2007,16(5):1551-1556. |
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| Authors: | LEI Ming LIAO Bohan QIN Pufeng |
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| Institution: | 1. College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; 2. International College, Central South University of Forestry and Technology, Changsha 410004, China |
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| Abstract: | Chemical speciation of heavy metal is hot topic in soil science,plant nutrition,and environmental science.Many scientists have developed many different sequential extraction procedures for chemical fractions.Assessment of bioavailability of heavy metal in contaminated soils with chemical fractionation,it is significance for us to fully understand the harms of heavy metals,and treat heavy metal contaminated soils.The result showed that the water soluble fraction and exchangeable species of metals are quite available for plants.However,the metals with residual fraction are the most difficult to be released.The other fractions such as bound to carbonate fraction,iron and manganese oxides,and organic matter,are usually to be readily available for plant uptake if conditions changed. |
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| Keywords: | bioavailability chemical fractionation contaminated soil heavy metal |
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