Distribution Characteristics and Risk Assessment of Polycyclic Aromatic Hydrocarbons in the Soil of the Pollution Prevention and Control Facilities Workshop of the Semi-Coke Plant
Semi-coke is a solid product of the pyrolysis and distillation of low rank coal in a closed environment,and the low-temperature distillation process of semi-coke production may produce certain Polycyclic Aromatic Hydrocarbons(PAHs),which poses high environmental risks.This study selects 10 pollution prevention and control facility workshops of semi-coke production enterprises with the same production process to detect PAHs in the soil around their ammonia and tar tanks,analyze their distribution characteristics,and conduct risk assessments.The results show that 16 types of PAHs are detected in the study area,and the distribution of PAHs pollution in the soil of the site is relatively common;the ranking of PAHs content in each soil layer is surface layer(167.74 mg/kg)＞deep layer(82.32 mg/kg)＞middle layer(20.55 mg/kg),which basically conforms to the enrichment law of soil;the content of naphthalene and benzo[a]pyrene exceeds the screening value for Class Ⅱ construction land,according to the toxicity equivalent method evaluation,the ecological risk ranking of PAHs in each soil layer is middle layer＞surface layer＞deep layer.
semi-cokepollution prevention and control facility workshopammonia tanktar tanksoilPolycyclic Aromatic Hydrocarbons(PAHs)distribution characteristicsrisk assessment
国家科技期刊平台
NSTL
万方数据
