Characterization of Soil Pollution and Health Risk Assessment in a Typical Petrochemical Enterprise in Shandong Province
To investigate the impact of petrochemical production activities on the soil environment,this study focused on a land parcel of a petrochemical company in Shandong.A total of 3435 soil samples were collected and analyzed for the concentrations of BTEX,PAHs,and petroleum hydrocarbons(C10-C40).Health risk assessments were conducted based on the results.The findings revealed that the concentrations of benzene,toluene,ortho-/para-xylene,benzo[a]pyrene,and petroleum hydrocarbons(C10-C40)in the land parcel exceeded the screening values specified in<GB 36600>for Class I land.The risk assessment indicated that the health risks associated with the aforementioned five pollutants are unacceptable for human exposure.The calculated risk control values for soil were determined as follows:0.156 mg/kg for benzene,0.56 mg/kg for toluene,12.2 mg/kg for m-xylene,12.3 mg/kg for p-xylene,and 826 mg/kg for petroleum hydrocarbons(C10-C40).Considering the relevant specifications provided in<GB 36600>for Class I land screening values,suggested remediation target values for the land parcel were proposed as follows:1 mg/kg for benzene,7.2 mg/kg for toluene,163 mg/kg for m-/p-xylene,and 826 mg/kg for petroleum hydrocarbons(C10-C40).
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