搬迁化工场地土壤污染现状分析与电氧化修复研究

doi:10.14088/j.cnki.issn0439-8114.2020.07.029

湖北农业科学 ›› 2020, Vol. 59 ›› Issue (7): 142-146.doi: 10.14088/j.cnki.issn0439-8114.2020.07.029

搬迁化工场地土壤污染现状分析与电氧化修复研究

周欢¹, 胡林潮¹, 胡敏², 朱雷鸣², 毛林强¹, 张文艺¹

1.常州大学环境与安全工程学院,江苏常州213164;
2.中石化广州工程有限公司,广州510500

收稿日期:2019-09-30 发布日期:2020-06-28
通讯作者: 张文艺（1968-）,男,教授,博士,主要从事污染控制与生态修复研究工作,（电话）13915046002（电子信箱）zhangwenyi888@sina.com。
作者简介:周欢（1993-）,女,江苏泰州人,在读硕士研究生,研究方向为土壤修复工艺,（电话） 15295136113（电子信箱）1143671452@qq.com;
基金资助:
中石化科技开发课题（14800000-19-ZC0607-0005）; 江苏省研究生培养创新工程项目（201910292035Y）

Analysis of soil pollution and chemical oxidation remediation in relocated chemical sites

ZHOU Huan¹, HU Lin-chao¹, HU Min², ZHU Lei-ming², MAO Lin-qiang, ZHANG Wen-yi¹

1. College of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China;
2. Sinopec Guangzhou Engineering Co., Ltd., Guangzhou 510500, China

Received:2019-09-30 Published:2020-06-28

摘要/Abstract

摘要： 针对化工企业搬迁后遗留场地的污染问题,以江苏常州某搬迁化工场地污染土壤为研究对象,通过现状分析确定目标污染物为多环芳烃类易挥发性有机物及氯苯类有机物。针对有机复合污染场地特征,以1-萘胺、1,2-二氯苯和1,4-二氯苯为主要去除污染物,采用电氧化原位修复技术对土壤进行处理。结果表明,水土质量比、电氧化时间、电流强度是电氧化修复主要影响因子,当水土质量比为2∶1、氧化电极电流强度为300 A、电氧化时间为15 min时,土壤中的主要污染物1-萘胺、1,2-二氯苯和1,4-二氯苯去除率均达到90%以上;有机复合污染越重的土壤,在相同电氧化时间区间内去除率越高,说明方法适用于处理污染物浓度较高的土壤。经测算,处理1 t土壤,约需费用70.9元。研究可为该化工企业有机复合污染场地修复提供技术工艺参数和理论依据,并可为同类型的污染场地修复提供技术选择和工艺设计参考。

关键词: 化工场地, 有机污染, 现状分析, 电氧化修复

Abstract: Aiming at the pollution problem of the site left after the relocation of chemical companies, a contaminated soil at a relocated chemical site in southern Jiangsu was taken as the research object. The status quo analysis determined that the target pollutants were polycyclic aromatic hydrocarbons, volatile organic compounds and chlorobenzenes. According to the characteristics of organic compound polluted sites, 1-naphthylamine, 1,2-dichlorobenzene and 1,4-dichlorobenzene were used as main pollutants to remove the pollutants, and the site soil was treated with electro-oxidation in situ remediation technology. The results show that the water-soil mass ratio, electro-oxidation time, and current intensity are the main influencing factors for electro-oxidation repair. When the mass ratio of water and soil is 2∶1, the current strength of the oxidation electrode is 300 A, and the electrooxidation time is 15 min, the removal rate of the main pollutants in the soil, 1-naphthylamine, 1,2-dichlorobenzene, and 1,4-dichlorobenzene reaches more than 90%; The heavier the organic compound polluted soil, the higher the removal rate within the same electro-oxidation time interval, indicating that the method is suitable for treating soils with higher pollutant concentrations. It is estimated that it will cost about 70.9 yuan to treat 1 t of soil. This study can provide technical process parameters and theoretical basis for the remediation of organic compound contaminated sites in this chemical enterprise, and can provide technical choices and process design references for the same type of contaminated site remediation.

Key words: chemical sites, organic pollution, status quo analysis, electrooxidative remediation

中图分类号:

周欢, 胡林潮, 胡敏, 朱雷鸣, 毛林强, 张文艺. 搬迁化工场地土壤污染现状分析与电氧化修复研究[J]. 湖北农业科学, 2020, 59(7): 142-146.

ZHOU Huan, HU Lin-chao, HU Min, ZHU Lei-ming, MAO Lin-qiang, ZHANG Wen-yi. Analysis of soil pollution and chemical oxidation remediation in relocated chemical sites[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(7): 142-146.

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搬迁化工场地土壤污染现状分析与电氧化修复研究

Analysis of soil pollution and chemical oxidation remediation in relocated chemical sites

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