| Fe3+负载凹凸棒土(Fe/ATP)结构表征及其稳定化修复镉(Cd)机制研究 |
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| 引用本文： | 杨蓉,李鸿博,周永莉,陈静,王琳玲,陆晓华. Fe3+负载凹凸棒土(Fe/ATP)结构表征及其稳定化修复镉(Cd)机制研究[J]. 环境科学, 2015, 36(8): 3032-3037 |
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| 作者姓名： | 杨蓉 李鸿博 周永莉 陈静 王琳玲 陆晓华 |
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| 作者单位： | 华中科技大学环境科学与工程学院，环境科学研究所，武汉 430074 |
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| 基金项目： | 中央高校基本科研业务费专项(2014TS093); 水利部公益性行业科研专项(201501019) |
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| 摘 要： | 以凹凸棒土(凹土,ATP)为原料,采用浸渍法制备Fe3+负载凹土(Fe/ATP),表征了其结构与形貌,研究了凹土和Fe/ATP对土壤中镉(Cd)的吸附效果,以浸出浓度作为稳定化评价指标,通过吸附前后凹土和Fe/ATP形貌等特征的变化探讨了稳定化修复Cd机制.结果表明,加入质量比20%的凹土和Fe/ATP,Cd的浸出浓度分别降低了45%和91%,说明Fe/ATP对土壤中Cd有显著的稳定化作用.形貌表征分析表明,凹土主要通过结构中的水、—OH基团和晶格缺陷来稳定Cd,而Fe/ATP对土壤中Cd稳定化作用可能主要来自—OH基团以及Fe—O中桥氧的贡献.凹土与氧化铁均为土壤中天然矿物,廉价易得且环境友好,制备方法简单易实现,该复合材料用于Cd污染土壤的稳定化修复具有较好的应用前景.
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| 关 键 词： | 凹土 Fe/ATP 土壤 镉 浸出浓度 稳定化机制 |
| 收稿时间： | 2015-01-23 |
| 修稿时间： | 2015-03-27 |
Stabilization of Cadmium Contaminated Soils by Ferric Ion Modified Attapulgite (Fe/ATP): Characterizations and Stabilization Mechanism |
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| YANG Rong,LI Hong-bo,ZHOU Yong-li,CHEN Jing,WANG Lin-ling and LU Xiao-hua. Stabilization of Cadmium Contaminated Soils by Ferric Ion Modified Attapulgite (Fe/ATP): Characterizations and Stabilization Mechanism[J]. Chinese Journal of Environmental Science, 2015, 36(8): 3032-3037 |
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| Authors: | YANG Rong LI Hong-bo ZHOU Yong-li CHEN Jing WANG Lin-ling LU Xiao-hua |
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| Affiliation: | Research Institute of Environmental Sciences, College of Environmental Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, China;Research Institute of Environmental Sciences, College of Environmental Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, China;Research Institute of Environmental Sciences, College of Environmental Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, China;Research Institute of Environmental Sciences, College of Environmental Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, China;Research Institute of Environmental Sciences, College of Environmental Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, China;Research Institute of Environmental Sciences, College of Environmental Science and Engineering,Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | |
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| Keywords: | attapulgite Fe/ATP soil Cadmium TCLP stabilization mechanism |
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