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蒙脱石-OR-SH复合体修复剂对重金属污染土壤中Cd的钝化效果

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赵秋香, 黄晓纯, 李媛媛, 陈亚刚, 刘文华, 李锡坤. 蒙脱石-OR-SH复合体修复剂对重金属污染土壤中Cd的钝化效果[J]. 环境化学, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
引用本文: 赵秋香, 黄晓纯, 李媛媛, 陈亚刚, 刘文华, 李锡坤. 蒙脱石-OR-SH复合体修复剂对重金属污染土壤中Cd的钝化效果[J]. 环境化学, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
shu
ZHAO Qiuxiang, HUANG Xiaochun, LI Yuanyuan, CHEN Yagang, LIU Wenhua, LI Xikun. A smectite-OR-SH compound for reducing cadmium uptake by pakchoi in contaminated soils[J]. Environmental Chemistry, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
Citation: ZHAO Qiuxiang, HUANG Xiaochun, LI Yuanyuan, CHEN Yagang, LIU Wenhua, LI Xikun. A smectite-OR-SH compound for reducing cadmium uptake by pakchoi in contaminated soils[J]. Environmental Chemistry, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
shu

蒙脱石-OR-SH复合体修复剂对重金属污染土壤中Cd的钝化效果

  • 1.

    广东省地质实验测试中心, 广州, 510080

  • 基金项目:

    国土资源部公益性行业科研专项项目(201111016)资助.

A smectite-OR-SH compound for reducing cadmium uptake by pakchoi in contaminated soils

  • 1.

    Guangdong Province Research Center for Geoanalysis, Guangzhou, 510080, China

  • Fund Project:

  • 摘要: 利用溶剂分散法成功地将功能基团-SH嫁接到蒙脱石上,得到蒙脱石-OR-SH复合体材料,该复合体材料对Cd的饱和吸附容量可达37.82 mg·g-1(0.1 mol·L-1KNO3体系)和69.13 mg·g-1(不考虑离子浓度影响).通过小白菜盆栽和大田试验探讨了该复合体材料对Cd污染土壤的钝化效果.结果表明,在Cd污染土壤上施加蒙脱石-OR-SH复合体材料后,土壤中可交换态Cd形态占比分别低了64.51%(原土)和80.37%(3 mg·kg-1 Cd含量的成化土),铁锰氧化结合态Cd形态占比分别提升了176.66%(原土)和418.31%(3 mg·kg-1 Cd含量的成化土),降低了毒性元素Cd在土壤中的活性和可移动性,有效地固定了土壤中的Cd,小白菜中镉含量比对照分别降低了57.14%(原土)和60.64%(3 mg·kg-1Cd含量的成化土),同时能促进小白菜的生长.
    Abstract: A smectite-OR-SH compound was prepared in lab. The adsorption capacity of the compound for cadmium was up to 37.82 mg·g-1in 0.1 mol·L-1KNO3 solution and 69.13 mg·g-1 in water. Pot and field experiments were conducted to investigate the immobilization effect and mechanism of the compound for reducing cadmium uptake by pakchoi in contaminated soils. The results showed that the cadmium of activated fraction decreased by 64.51% in raw soil and 80.37% in 3 mg·kg-1Cd soil after adding the smectite-OR-SH compound. The cadmium of Fe-Mn oxide fractions increased by 176.66% in raw soil and 418.31% in 3 mg·kg-1Cd soil. The compound inhibited the adsorption and accumulation of cadmium in pakchoi, and the cadmium content decreased by 57.14%-60.64% comparing to the control. The compound also promoted the growth of pakchoi.
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  • 收稿日期:  2014-01-15
  • 刊出日期:  2014-11-15
赵秋香, 黄晓纯, 李媛媛, 陈亚刚, 刘文华, 李锡坤. 蒙脱石-OR-SH复合体修复剂对重金属污染土壤中Cd的钝化效果[J]. 环境化学, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
引用本文: 赵秋香, 黄晓纯, 李媛媛, 陈亚刚, 刘文华, 李锡坤. 蒙脱石-OR-SH复合体修复剂对重金属污染土壤中Cd的钝化效果[J]. 环境化学, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
shu
ZHAO Qiuxiang, HUANG Xiaochun, LI Yuanyuan, CHEN Yagang, LIU Wenhua, LI Xikun. A smectite-OR-SH compound for reducing cadmium uptake by pakchoi in contaminated soils[J]. Environmental Chemistry, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
Citation: ZHAO Qiuxiang, HUANG Xiaochun, LI Yuanyuan, CHEN Yagang, LIU Wenhua, LI Xikun. A smectite-OR-SH compound for reducing cadmium uptake by pakchoi in contaminated soils[J]. Environmental Chemistry, 2014, 33(11): 1871-1877. doi: 10.7524/j.issn.0254-6108.2014.11.011
shu

蒙脱石-OR-SH复合体修复剂对重金属污染土壤中Cd的钝化效果

  • 1. 广东省地质实验测试中心, 广州, 510080
  • 收稿日期:  2014-01-15
基金项目:

国土资源部公益性行业科研专项项目(201111016)资助.

摘要: 利用溶剂分散法成功地将功能基团-SH嫁接到蒙脱石上,得到蒙脱石-OR-SH复合体材料,该复合体材料对Cd的饱和吸附容量可达37.82 mg·g-1(0.1 mol·L-1KNO3体系)和69.13 mg·g-1(不考虑离子浓度影响).通过小白菜盆栽和大田试验探讨了该复合体材料对Cd污染土壤的钝化效果.结果表明,在Cd污染土壤上施加蒙脱石-OR-SH复合体材料后,土壤中可交换态Cd形态占比分别低了64.51%(原土)和80.37%(3 mg·kg-1 Cd含量的成化土),铁锰氧化结合态Cd形态占比分别提升了176.66%(原土)和418.31%(3 mg·kg-1 Cd含量的成化土),降低了毒性元素Cd在土壤中的活性和可移动性,有效地固定了土壤中的Cd,小白菜中镉含量比对照分别降低了57.14%(原土)和60.64%(3 mg·kg-1Cd含量的成化土),同时能促进小白菜的生长.

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