1 School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China 2 State Key Laboratory of Iron & Steel Industry Environmental Protection, Beijing 100088, China
Abstract: In the process of microwave remediation of organic contaminated soil, microwave energy could not be converted into heat energy due to the low dielectric co-efficient of soil particles. Therefore, it is difficult to reach an ideal temperature for remediation, resulting in a low removal efficiency of contaminants. The overall microwave absorption performance of contaminated soil can be improved by adding absorbers. Under their ‘hot spots' effect, the heating rate and final remediation temperature of the soil are significantly improved, which significantly increases the removal efficiency of organic pollutants. In addition, some absorbers with oxidation or catalytic effect can also degrade the organic pollutants in contaminated soil, which are in favor of the removal of organic pollutants. In this paper, we focus on the absorber that is suitable for microwave remediation of organic contaminated soil, and summarize its function, selection criteria, and absorber type. Then we describe the industrial applications and problems of microwave remediation, and propose the future research direction of absorbers, aiming at providing useful reference for the promotion and application of microwave soil remediation technology.
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