期刊
WATER AIR AND SOIL POLLUTION
卷 232, 期 8, 页码 -出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/s11270-021-05182-4
关键词
Soil pollution; Electro-kinetic remediation; Enhanced method; Pore water; Electrode; In situ separation
资金
- National Natural Science Foundation of China [51979006, 41907401]
- Outstanding Young Talents of National High-Level Personnel of the Special Support Program [CKSD2019542/SH]
- WATERAGRI project (European Union) [858735]
Electro-kinetic remediation is an environmentally friendly technology that can migrate and remove pollutants from soil and sediment. However, challenges such as incomplete separation of pollutants, variations in physico-chemical properties of soil/sediment, and difficulties in in situ practice need to be addressed for effective implementation.
Remediation of contaminated soil and sediment is important for improving the eco-environmental quality. Electro-kinetic remediation (EKR) is an environmentally friendly technology to migrate and remove pollutants from the soil and sediment matrix. This paper analyses the mechanism and performance of EKR of heavy metals, organic pollutants, and compound pollutants. Moreover, the effect of optimizing individual EKR through soil and sediment pre-treatment (adding acid/oxidant/co-solvent/surfactant, stirring, heating, etc.), electrode optimization (exchange electrode, anode approximation, electrode matrix, etc.), and applying multi-technology combination (electro-kinetic permeable reaction barrier/Fenton/ion, exchange membrane/ultrasonic/electrolyte enhancement, etc.) was evaluated. Factors including incomplete separation of pollutants, variation in physico-chemical properties and microstructure of soil/sediment, and difficulties in in situ practice have restrained the field application of EKR. To solve the above technical challenge, an integrated EKR technology based on pollutant in situ separation, followed by separated contaminant treatment, and subsequent valuable elements recovery is proposed.
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