| 利用道南膜技术(DMT)研究土壤中重金属自由离子浓度 |
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| 引用本文： | 赵磊,崔岩山,杜心,朱永官. 利用道南膜技术(DMT)研究土壤中重金属自由离子浓度[J]. 环境科学学报, 2005, 25(11): 1565-1569 |
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| 作者姓名： | 赵磊 崔岩山 杜心 朱永官 |
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| 作者单位： | 中国科学院生态环境研究中心,北京,100085;云南环境科学研究院,昆明,650034;中国科学院生态环境研究中心,北京,100085;中国科学院研究生院,北京,100049;中国科学院生态环境研究中心,北京,100085 |
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| 基金项目： | 国家自然科学基金（No.20207012）;国家重点基础研究计划项目（No.2002CB410808）;中国科学院知识创新项目（No.KZCX1-SW-19） |
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| 摘 要： | 采用近年新发展起来的一种研究重金属自由离子浓度的方法———道南膜技术,研究了采自我国不同地区的11种耕层土壤中Cd、Zn、Pb和Cu的自由离子浓度.结果表明,道南膜技术测定的Cd、Zn自由态浓度与WinHumicV模型计算结果吻合较好,测定的Pb和Cu自由态浓度稍高于WinHumicV模型计算结果.同时,采用Sauv啨提出的吸附腜投匀芙馓妥杂商闹亟鹗艚蟹治?结果表明,溶解态Zn、Cu和Pb以及自由态的Zn、Cu受土壤的污染程度(重金属总量)、土壤pH和溶液中溶解性有机碳控制.
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| 关 键 词： | 道南膜技术 重金属 自由离子浓度 |
| 文章编号： | 0253-2468(2005)11-1565-06 |
| 收稿时间： | 2005-06-10 |
| 修稿时间： | 2005-07-18 |
Study on free ion concentrations of heavy metals in soils by Donnan Membrane Technique |
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| ZHAO Lei,CUI Yanshan,DU Xin and ZHU Yongguan. Study on free ion concentrations of heavy metals in soils by Donnan Membrane Technique[J]. Acta Scientiae Circumstantiae, 2005, 25(11): 1565-1569 |
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| Authors: | ZHAO Lei CUI Yanshan DU Xin ZHU Yongguan |
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| Affiliation: | 1. Research Center for Eco2Environmental Sciences, Chinese Academy of Sciences, Beijing 100085; 2. Yunnan Institute of Environmental Science, Kunming 650034,1. Research Center for Eco2Environmental Sciences, Chinese Academy of Sciences, Beijing 100085; 2. Graduate School of Chinese Academy of Sciences, Beijing, 100049,Research Center for Eco2Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 and Research Center for Eco2Environmental Sciences, Chinese Academy of Sciences, Beijing 100085;Graduate School of Chinese Academy of Sciences, Beijing, 100049 |
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| Abstract: | Free ion concentration is one of the most important approaches that have been used to determine heavy metal bioavailability in soils. Donnan membrane technique (DMT), a new method measuring the free metal ion concentrations in soil, was applied to study the free metal ion of some soils collected from different regions of China. The results showed that free Cd2+ and Zn2+ concentrations corresponded well with those simulated with WinHumicVmodel. Free Pb2+ and Cu2+ concentrations were higher than those predicted with WinHumicVmodel. And Sauvé's competitive adsorption model, based on soil pH, total metal content and log (DOC), was a better tool to predict dissolved Zn,Cu and Pb as well as free Zn2+ and Cu2+ concentrations. |
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| Keywords: | Donnan membrane technique heavy metal free ion concentration |
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