Study on Leaching Characteristics and Release Kinetics of Heavy Metals in Polluted Purple Soil

ZHENG Shun-an; ZHENG Xiang-qun; ZHANG Tie-liang; LIU Shu-tian

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Study on Leaching Characteristics and Release Kinetics of Heavy Metals in Polluted Purple Soil

更新时间：2024-11-07

- Study on Leaching Characteristics and Release Kinetics of Heavy Metals in Polluted Purple Soil
- Vol. 25, Issue 4, (2011)
- 作者机构：
  
  农业部环境保护科研监测所/农业部产地环境与农产品安全重点开放实验室/天津市农业环境与农产品安全重点开放实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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ZHENG Shun-an, ZHENG Xiang-qun, ZHANG Tie-liang, et al. Study on Leaching Characteristics and Release Kinetics of Heavy Metals in Polluted Purple Soil[J]. 2011, 25(4).
DOI：

ZHENG Shun-an, ZHENG Xiang-qun, ZHANG Tie-liang, et al. Study on Leaching Characteristics and Release Kinetics of Heavy Metals in Polluted Purple Soil[J]. 2011, 25(4). DOI：

摘要

通过室内土柱试验

探讨雨水作用下紫色土中Cu、Pb和Cd等重金属元素的淋溶和释放特征。结果表明

在淋溶量为6 000 ml的模拟降雨作用下

淋溶量2 000 ml内是紫色土中重金属快速释放时期

在这个期间

淋溶液内重金属浓度较高

释放速度不断减小

是快速释放过程

对环境及地下水威胁较大;2 000ml后

淋溶液内重金属浓度很低

累计释放量变化不大。整个淋溶过程中

3种重金属释放率的顺序为:Cd>Cu>Pb。模拟降雨条件下污染紫色土重金属的释放过程可用修正的Elovich方程和双常数方程进行拟合

且Elovich方程拟合的效果更好。

Abstract

This work was conducted to study the leaching characteristics and release kinetics of heavy metals copper(Cu)

lead(Pb) and cadmium(Cd) in polluted purple soil through column experiment.The results manifested that

the release mechanism of heavy metals in purple soil appeared to be consisted of two phases involving the initial rapid process(leachate less than 2 000 ml) followed by a slow continuous process.In rapid process

the concentrations of heavy metals in leachate were comparatively higher

and the releas...

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Related Institution

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