Electrokinetic Remediation for Environmental Security and Sustainability

20The Integration of Electrokinetics and In Situ Chemical Oxidation Processes for the Remediation of Organically Polluted Soils

Long Cang¹, Qiao Huang^1,2, Hongting Xu¹, and Mingzhu Zhou¹

¹ Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China

² College of Resources and Environment, University of the Chinese Academy of Sciences, Beijing 100049, China

20.1 Introduction

The rapid development of industry has meant that soil contamination by organic pollutants is now a serious environmental problem. A large variety of technologies have been developed to remediate contaminated soils, including physical (e.g. thermal desorption [1] and soil washing [2, 3]), chemical (e.g. chemical oxidation [4, 5] and chemical reduction [6]), and biological processes (e.g. microbial remediation [7, 8]). Among these technologies, chemical treatment is a widely used approach for soil and groundwater remediation because of its wide applicability, relatively fast treatment times, simplicity of operation, and cost‐effectiveness [9, 10]. According to the Superfund Remedy Report [11], chemical treatment was one of the most frequently selected in situ methods (27 ∼ 42%), and more than half of the chosen chemical treatments involved chemical oxidation.

The primary principle of in situ chemical oxidation (ISCO) is the introduction of a chemical oxidant into the soil/groundwater subsurface to transform organic contaminants ...