铬污染场地渣土混合物的化学还原修复

史开宇; 颜湘华; 范琴; 沈重阳; 王兴润

doi:10.12030/j.cjee.201809069

环境工程学报

铬污染场地渣土混合物的化学还原修复

, , , ,

史开宇, 颜湘华, 范琴, 沈重阳, 王兴润. 铬污染场地渣土混合物的化学还原修复[J]. 环境工程学报, 2019, 13(4): 963-968. doi: 10.12030/j.cjee.201809069

引用本文:

史开宇, 颜湘华, 范琴, 沈重阳, 王兴润. 铬污染场地渣土混合物的化学还原修复[J]. 环境工程学报, 2019, 13(4): 963-968. doi: 10.12030/j.cjee.201809069

SHI Kaiyu, YAN Xianghua, FAN Qin, SHEN Chongyang, WANG Xingrun. Chemical reduction remediation of chromium residue and soil mixture from a chromium-contaminated site[J]. Chinese Journal of Environmental Engineering, 2019, 13(4): 963-968. doi: 10.12030/j.cjee.201809069

Citation:

SHI Kaiyu, YAN Xianghua, FAN Qin, SHEN Chongyang, WANG Xingrun. Chemical reduction remediation of chromium residue and soil mixture from a chromium-contaminated site[J]. Chinese Journal of Environmental Engineering, 2019, 13(4): 963-968. doi: 10.12030/j.cjee.201809069

铬污染场地渣土混合物的化学还原修复

1.
北京建工环境修复股份有限公司污染场地安全修复技术国家工程实验室，北京 100015
2.
中国环境科学研究院环境基准与风险评估国家重点实验室，北京 100012
3.
中国农业大学资源与环境学院，北京 100193
4.
四川省环境保护科学研究院，成都 610041
基金项目:
北京建工环境修复股份有限公司污染场地安全修复技术国家工程实验室开放基金NEL-SRT201705

国家重点研发计划项目2018YFC1802200北京建工环境修复股份有限公司污染场地安全修复技术国家工程实验室开放基金(NEL-SRT201705)

国家重点研发计划项目(2018YFC1802200)

Chemical reduction remediation of chromium residue and soil mixture from a chromium-contaminated site

1.
National Engineering Laboratory for Site Remediation Technologies, BCEG Environmental Remediation Co.Ltd., Beijing 100015, China
2.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3.
College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
4.
Sichuan Academy of Environmental Sciences, Chengdu 610041, China
Fund Project:

摘要: 针对目前铬污染场地表层重污染铬渣混土难处理的问题，选用河南义马某铬盐厂铬渣堆场表层渣土混合物为研究对象，在分析其理化特性的基础上，研究CaS4、FeSO4·7H2O和葡萄糖3种还原药剂对Cr(VI) 的还原效率，通过改变药剂投加量、反应体系pH、反应时间等条件，优化修复工艺参数。结果表明，3种还原药剂对渣土混合物的最佳还原效率大小为CaS4(98.50%)>FeSO4·7H2O(72.21%)>葡萄糖(51.45%)。CaS4还原修复渣土混合物的最优工艺参数为：药剂投加量为还原反应理论当量的2倍，体系pH在3～9，反应时间0.5 h。
- 污染场地修复 /
- 渣土混合物化学还原 /
- 铬污染 /
- 土壤修复
Abstract: It’s difficult to safely treat the chromium residue and soil mixture at chromium-contaminated sites. In this study, the chromium residue and soil mixture of a chrome salt plant in Yima city, Henan province was taken as remediation object. On the basis of analyzing the physicochemical properties of the mixture, the effects of doses of three reducing agents, such as CaS4, FeSO4·7H2O and glucose, pH and time of reaction system on the reduction rate of Cr(VI) were studied, then these operational parameters were optimized. Results showed that the order of the optimum reduction efficiencies by these three reducing agents was CaS4 (98.5%) >FeSO4·7H2O (72.2%) > glucose (51.5%). The optimal process parameters for the reduction and remediation of the residue and soil mixture by CaS4 were following: CaS4 dosage of 2 times the theoretical equivalent of the reduction reaction, pH = 3~9, and 0.5 h reaction time.
- contaminated site remediation /
- chemical reduction of the chromium residue and soil mixture /
- chromium pollution /
- soil remediation

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史开宇, 颜湘华, 范琴, 沈重阳, 王兴润. 铬污染场地渣土混合物的化学还原修复[J]. 环境工程学报, 2019, 13(4): 963-968. doi: 10.12030/j.cjee.201809069

引用本文:

史开宇, 颜湘华, 范琴, 沈重阳, 王兴润. 铬污染场地渣土混合物的化学还原修复[J]. 环境工程学报, 2019, 13(4): 963-968. doi: 10.12030/j.cjee.201809069

Citation:

铬污染场地渣土混合物的化学还原修复

1. 北京建工环境修复股份有限公司污染场地安全修复技术国家工程实验室，北京 100015
2. 中国环境科学研究院环境基准与风险评估国家重点实验室，北京 100012
3. 中国农业大学资源与环境学院，北京 100193
4. 四川省环境保护科学研究院，成都 610041

基金项目:

北京建工环境修复股份有限公司污染场地安全修复技术国家工程实验室开放基金NEL-SRT201705

国家重点研发计划项目2018YFC1802200北京建工环境修复股份有限公司污染场地安全修复技术国家工程实验室开放基金(NEL-SRT201705)

国家重点研发计划项目(2018YFC1802200)

关键词:

摘要: 针对目前铬污染场地表层重污染铬渣混土难处理的问题，选用河南义马某铬盐厂铬渣堆场表层渣土混合物为研究对象，在分析其理化特性的基础上，研究CaS4、FeSO4·7H2O和葡萄糖3种还原药剂对Cr(VI) 的还原效率，通过改变药剂投加量、反应体系pH、反应时间等条件，优化修复工艺参数。结果表明，3种还原药剂对渣土混合物的最佳还原效率大小为CaS4(98.50%)>FeSO4·7H2O(72.21%)>葡萄糖(51.45%)。CaS4还原修复渣土混合物的最优工艺参数为：药剂投加量为还原反应理论当量的2倍，体系pH在3～9，反应时间0.5 h。

English Abstract

Chemical reduction remediation of chromium residue and soil mixture from a chromium-contaminated site

1. National Engineering Laboratory for Site Remediation Technologies, BCEG Environmental Remediation Co.Ltd., Beijing 100015, China
2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
3. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
4. Sichuan Academy of Environmental Sciences, Chengdu 610041, China

Fund Project:

Keywords:

contaminated site remediation /
chemical reduction of the chromium residue and soil mixture /
chromium pollution /
soil remediation

Abstract: It’s difficult to safely treat the chromium residue and soil mixture at chromium-contaminated sites. In this study, the chromium residue and soil mixture of a chrome salt plant in Yima city, Henan province was taken as remediation object. On the basis of analyzing the physicochemical properties of the mixture, the effects of doses of three reducing agents, such as CaS4, FeSO4·7H2O and glucose, pH and time of reaction system on the reduction rate of Cr(VI) were studied, then these operational parameters were optimized. Results showed that the order of the optimum reduction efficiencies by these three reducing agents was CaS4 (98.5%) >FeSO4·7H2O (72.2%) > glucose (51.5%). The optimal process parameters for the reduction and remediation of the residue and soil mixture by CaS4 were following: CaS4 dosage of 2 times the theoretical equivalent of the reduction reaction, pH = 3~9, and 0.5 h reaction time.