Study on Distribution Characteristics and Remediation Technology of Synthetic Musk in the Contaminated Site

Synthetic musk can migrate and transform through various environmental media.It is a type of semi-volatile organic pollutant that is difficult to degrade in the environment and prone to bioaccumulation,which has seriously threatened the safety of the ecological system and human health.Current research on synthetic musk removal mainly focuses on water treatment,with little reported on soil remediation.This article analyzes the spatial distribution and enrichment characteristics of synthetic musk in a contaminated site in China,finding that SMs have stronger migration ability in the horizontal direction,with a vertical increase before decreasing and enrichment in the silt clay layer.Three representative remediation technologies,including chemical oxidation,ex-situ thermal desorption,and cement kiln co-processing,were selected to explore the key process parameters for SMs-contaminated soil remediation technology through experiments.The results show that some SMs can be chemically oxidized,but the oxidation concentration is still higher than the “risk control value” determined by the detection limit of 0.1mg/kg;the efficiency of SMs thermal desorption increases significantly with increasing heating temperature and then tends to be stable,and continuous temperature increase is not economical for improving the remediation effect;cement kiln co-disposal technology is an effective way to ensure that SMs contaminated soil is remediated to meet standards and achieve resource utilization.Finally,this article proposes a prospect for detection methods,risk assessment methods,and governance models for synthetic musk pollutants,in combination with the current situation where there are no laws,regulations,or standards for synthetic musk pollutants.