长江科学院院报 ›› 2021, Vol. 38 ›› Issue (1): 41-50.DOI: 10.11988/ckyyb.20191038

• 水土保持与生态建设 • 上一篇    下一篇

污染土壤/底泥电动修复研究进展

韩丁1,2,3, 黎睿1,3, 汤显强1,3, 肖尚斌2, 李青云1,3   

  1. 1.长江科学院 流域水环境研究所,武汉 430010;
    2.三峡大学 水利与环境学院,湖北 宜昌 443002;
    3.长江科学院 流域水资源与生态环境科学湖北省重点实验室,武汉 430010
  • 收稿日期:2019-08-22 修回日期:2019-10-28 出版日期:2021-01-01 发布日期:2021-01-27
  • 通讯作者: 汤显强(1981-),男,湖北竹溪人,教授级高级工程师,博士,主要从事水资源保护与污染控制方面的研究。E-mail:ckyshj@126.com
  • 作者简介:韩 丁(1994-),男,河北邢台人,硕士研究生,主要从事水资源保护与污染控制方面的研究。E-mail:839266116@qq.com
  • 基金资助:
    国家自然科学基金面上项目(51979006);湖北省技术创新专项重大项目(2017ABA073);国家重点研发计划项目(2018YFC040760403)

Research Progress on Electro-kinetic Remediation of Contaminated Soil/Sediment

HAN Ding1,2,3, LI Rui1,3, TANG Xian-qiang1,3, XIAO Shang-bin2, LI Qing-yun1,3   

  1. 1. Basin Water Environment Department, Yangzte River Scientific Research Institute, Wuhan 430010, China;
    2. College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;
    3. Hubei Provincial Key Lab of Basin Water Resource and Eco-environmental Science,Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2019-08-22 Revised:2019-10-28 Online:2021-01-01 Published:2021-01-27

摘要: 修复污染土壤/底泥对改善生态环境质量极为重要,通过对污染土壤/底泥施加电场,可使污染物定向迁移、富集并去除。综述了电动修复的发展历程,比较了重金属、有机污染物及复合污染物的电动修复机理及其限制因素,分析了土壤预处理(加入酸、氧化剂、共溶剂、表面活性剂,搅拌,升温等)、电极优化(交换电极、阳极逼近、电极矩阵等)、多技术(EK-PRB、Fenton、IEM、ASC、超声波、电解质增强等)联用对单一电动修复的性能优化概况。总体来看,污染物分离不彻底、土壤/底泥理化性质和微观结构改变、原位规模化应用困难等制约了电动修复污染土壤/底泥的效果。针对上述技术瓶颈,提出污染原位分离-污染物处理-有价资源回收的一体化电动修复技术。该技术可解决电动修复易破坏土壤生态和污染物难以外排的问题,实现了污染处理和有价资源的回收。

关键词: 土壤/底泥污染, 电动修复, 预处理, 电极优化, 污染原位分离, 研究进展

Abstract: Remediation of contaminated soil/sediment is extremely important for improving eco-environmental health. By applying electric field to contaminated soil/sediment, pollutants can be migrated, enriched and removed. In this paper the history of electro-kinetic remediation research is reviewed, and the mechanisms of electro-kinetic remediating heavy metals, organic pollutants and compound pollutants are compared. The performances of soil pretreatment (adding acid,oxidant,co-solvent and surfactant, stirring, and heating), electrode optimization (exchange electrode, anode approximation, and electrode matrix), multi-technology combination (EK-PRB,Fenton,IEM,ASC,ultrasonic,electrolyte enhancement) in optimizing the single electro-kinetic remediation are also examined. In general, the incomplete separation of pollutants, the change in soil/sediment’s microstructure as well as physical-chemical properties, and the difficulty of large-scale in-situ application have restrained the engineering application of electro-kinetic in remediating contaminated soil/sediment. To tackle such technical challenges, an integrated electro-kinetic remediation technology involving in-situ pollutant separation, separated contaminant treatment, and valuable resource recovery is proposed. The proposed technology could solve the problem of damage to soil ecology and overcome the difficulty of pollutant drainage.

Key words: soil/sediment pollution, electro-kinetic remediation, pretreatment, electrode optimization, pollutant in situ separation, research progress

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