Research Progress on Distribution and Remediation Technologies for the Combined Pollution of Heavy Metals and Polycyclic Aromatic Hydrocarbons in Soil

The contaminants in soil usually exist in the form of combined pollution, and the interactions between various contaminants make it more difficult to remediate, so that treatment technologies for single contaminant is difficult to meet the requirement of soil remediation. This study summarizes the distribution of heavy metals and polycyclic aromatic hydrocarbons combined pollution, and the mechanisms and application conditions of several kinds of soil remediation technologies, such as soil washing, phytoremediation, microbial remediation and electrokinetic processing. It focuses on putting forward the prospect of further study on combined pollution soil remediation of the above mentioned contaminants.