Abstract:
Polycyclic aromatic hydrocarbons (PAHs) are hydrocarbon compounds composed of two or more benzene rings. Their carcinogenic, mutagenic and teratogenic properties have adverse effects on human health and ecological environment. Due to the characteristics of low water solubility, high hydrophobicity and difficult degradation of PAHs, the remediation of PAHs-contaminated soil poses significant challenges. Advanced oxidation technologies have emerged as effective approaches for addressing PAHs contamination in soil. The research progress in the field of advanced oxidation technologies for the remediation of PAHs-contaminated soil was summarized, with a focus on the advantages and disadvantages analysis of ozone oxidation, Fenton oxidation, and persulfate oxidation. Furthermore, the role of surfactants in enhancing the effectiveness of advanced oxidation was explored and the influence of soil physicochemical conditions on the oxidation process was discussed. Potential impacts of the oxidation process on the soil microenvironment were also analyzed. Finally, the research difficulties and future directions of remediation of PAHS-contaminated soil by advanced oxidation were pointed out.