【引用本文】 安茂国, 赵庆令, 谭现锋, 等. 化学还原-稳定化联合修复铬污染场地土壤的效果研究[J]. 岩矿测试, 2019, 38(2): 204-211. doi: 10.15898/j.cnki.11-2131/td.201806040068
AN Mao-guo , ZHAO Qing-ling , TAN Xian-feng , et al. Research on the Effect of Chemical Reduction-Stabilization Combined Remediation of Cr-contaminated Soil[J]. Rock and Mineral Analysis, 2019, 38(2): 204-211. doi: 10.15898/j.cnki.11-2131/td.201806040068

化学还原-稳定化联合修复铬污染场地土壤的效果研究

1. 山东省鲁南地质工程勘察院, 山东 兖州 272100;

2. 自然资源部采煤沉陷区综合治理与生态修复工程技术创新中心, 山东 兖州 272100

收稿日期: 2018-06-04  修回日期: 2018-07-24 

基金项目: 山东省地质勘查项目“铬污染土壤化学还原法修复机理及效果研究”(鲁国土资字〔2016〕328号)

作者简介: 安茂国,工程师,主要从事矿产地质及生态地球化学工作。E-mail:15963775283@163.com。。

通信作者:

Research on the Effect of Chemical Reduction-Stabilization Combined Remediation of Cr-contaminated Soil

1. Lunan Geo-Engineering Exploration Institute of Shandong Province, Yanzhou 272100, China;

2. Technology Innovation Center of Integrated Management and Ecological Restoration for Mining Subsidence Area, Ministry of Natural Resources, Yanzhou 272100, China

Corresponding author: TAN Xian-feng , 从事水工环地质工作。geotan1977@126.com。

Received Date: 2018-06-04
Revised Date: 2018-07-24

摘要:六价铬是国际公认的47种最危险的废物之一,研究铬污染土壤的修复效果对污染场地风险管控具有重要的现实意义。本文以济南市某典型铬污染场地土壤作为研究对象,提出了"化学还原+固化稳定"的修复治理思路,针对修复剂类型、投加比、反应时间、还原效率、修复成本和环境效应等因素,确定了该修复工艺的最佳条件,并对污染土壤的修复效果进行评价。结果表明土壤中Cr(Ⅵ)的最佳修复条件为:以氯化亚铁作为化学还原剂,其投加比为5倍的理论投料比,还原时间为2天;以钙镁磷肥作为稳定剂,其投加比为10%(换算成钙镁磷肥与总铬的质量比为72:1)。采用以上条件修复铬污染土壤,总铬的生物可利用系数由0.4398降低至0.0017,Cr(Ⅵ)含量介于0.315~0.501mg/kg,被还原率大于99.5%。该结果可为土壤修复和决策提供依据。

关键词: 化学还原, 稳定化, 六价铬, 土壤修复, 联合方法

Research on the Effect of Chemical Reduction-Stabilization Combined Remediation of Cr-contaminated Soil

KEY WORDS: chemical reduction, stabilization, Cr(Ⅵ), soil remedy, combined method

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化学还原-稳定化联合修复铬污染场地土壤的效果研究

安茂国, 赵庆令, 谭现锋, 王永刚, 李清彩