| 镉及其络合物在黏土上的吸附行为 |
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| 引用本文： | 王丹瑞,贾旭,于凌,张凤君,常馨月.镉及其络合物在黏土上的吸附行为[J].世界地质,2010,29(4):663-667. |
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| 作者姓名： | 王丹瑞 贾旭 于凌 张凤君 常馨月 |
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| 作者单位： | 吉林大学环境与资源学院，长春130026 |
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| 基金项目： | 国家科技重大专项(2008ZX07207-007-04) |
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| 摘 要： | 淋洗剂EDTA 二钠和柠檬酸三钠与镉形成的络合物及镉本身在黏土上的吸附行为研究表明: 上述两种淋洗剂能有效提取表层土中的Cd，形成的络合物在迁移过程中又能较好地被黏土层吸附。黏土对Cd2 +、Cd--EDTA 和Cd--柠檬酸的吸附容量顺序为: Cd--柠檬酸＞ Cd2 + ＞ Cd － EDTA; 3 种形态的吸附过程均以离子交换吸附为主，并在15 min 内完成。黏土对Cd2 + 和Cd － 柠檬酸的吸附容量随溶液初始pH 的升高而增大，对Cd--EDTA 的吸附容量随pH 升高略有降低。
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| 关 键 词： | 镉 镉络合物 黏土 吸附 |
Adsorption behaviors of cadmium and its complexes on clay |
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| WANG Dan-rui,JIA Xu,YU Ling,ZHANG Feng-jun,CHANG Xin-yue.Adsorption behaviors of cadmium and its complexes on clay[J].World Geology,2010,29(4):663-667. |
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| Authors: | WANG Dan-rui JIA Xu YU Ling ZHANG Feng-jun CHANG Xin-yue |
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| Institution: | College of Environment and Resources，Jilin University，Changchun 130026，China |
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| Abstract: | The adsorption behaviors of cadmium and its complexes with two kinds of eluents including EDTA disodium and trisodium citrate on clay were studied.The results showed that the two kinds of eluents had strong chelating ability for cadmium in topsoil,and the complexes were strongly adsorbed by clay in their transport process.The sequence of adsorption capacities of clay was：Cd—citrate Cd2＋Cd—EDTA,and the main sorption mechanism of the three forms were ion-exchange absorption and could be obtained in 15 min.The adsorption quantity of clay increased to Cd2＋ and Cd—citrate and slightly decreased to Cd—EDTA,along with the increasing of initial pH value in solution. |
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| Keywords: | Cd cadmium complexes clay adsorption |
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