Laboratory Study of Soil-bentonite Vertical Barrier on Heavy Metal Migration Retardation

刘睿; 杜延军; 梅丹兵; 蒋宁俊; 梅志华; 冯晓伟

doi:10.13409/j.cnki.jdpme.2018.05.007

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Laboratory Study of Soil-bentonite Vertical Barrier on Heavy Metal Migration Retardation

更新时间：2025-12-11

- Laboratory Study of Soil-bentonite Vertical Barrier on Heavy Metal Migration Retardation
- Vol. 38, Issue 5, Pages: 815-821(2018)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2018.05.007
  CLC： U43;X131.3
- Published：2018
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[1]刘睿,杜延军,梅丹兵,蒋宁俊,梅志华,冯晓伟.土-膨润土系竖向隔离工程屏障阻滞重金属污染物运移特性试验研究[J].防灾减灾工程学报,2018,38(05):815-821.

刘睿, 杜延军, 梅丹兵, et al. Laboratory Study of Soil-bentonite Vertical Barrier on Heavy Metal Migration Retardation[J]. 2018, 38(5): 815-821.
[1]刘睿,杜延军,梅丹兵,蒋宁俊,梅志华,冯晓伟.土-膨润土系竖向隔离工程屏障阻滞重金属污染物运移特性试验研究[J].防灾减灾工程学报,2018,38(05):815-821. DOI： 10.13409/j.cnki.jdpme.2018.05.007.

刘睿, 杜延军, 梅丹兵, et al. Laboratory Study of Soil-bentonite Vertical Barrier on Heavy Metal Migration Retardation[J]. 2018, 38(5): 815-821. DOI： 10.13409/j.cnki.jdpme.2018.05.007.

摘要

通过室内试验及理论分析对砂土-膨润土系竖向隔离工程屏障（简称S-B隔离屏障）阻滞重金属运移特性进行了研究:通过一维化学渗透土柱试验研究了S-B隔离工程屏障材料对典型重金属Pb的阻滞规律。S-B工程屏障材料对Pb具有一定的化学渗透膜效应

其化学渗透效率系数ω随溶质浓度增大而减小

且在半对数坐标下呈现良好的线性关系;Pb浓度在5～60mmol/L时

其化学渗透效率系数ω的范围为0.008～0.030。同时

Pb在材料中的有效扩散系数D*随溶质浓度增大而增大

并逐渐趋于稳定。

Abstract

The contaminant retardation performance of sand-bentonite slurry-wall backfill was investigated by laboratory model test and theoretical analysis.The following conclusions can be obtained:The chemical retardation characteristics of sand-bentonite for heavy metals Pb and Zn were investigated using chemical soil column test.The membrane efficiency of sand-bentonite is significant for heavy metals Pb and Zn.The membrane effect coefficient decreases with the increase of solute concentration

and shows a good linear relationship in semi-logarithm coordinate.The membrane effect coefficient ranges from 0.008 to 0.03 when the concentration of heavy metals Pb is between 5 mmol/L and 60 mmol/L.The effective diffusion coefficient of heavy metal Pb in sand-bentonite was investigated using chemical soil column test.The effective diffusion coefficient of heavy metals Pb increases with the increase of solute concentration and eventually stabilized in sand-bentonite system.

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references

土—膨润土系竖向隔离工程屏障阻滞污染物运移的模型试验研究 [D]. 梅丹兵. 东南大学 2017

一种黏性土试样的性能测试装置及其测试方法 [P]. 杜延军,范日东,陈左波. 中国专利:CN102749277A,

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