摘要
Abstract
In this investigation,12 surface samples were collected from retained buildings at the former site of a closed steel plant,and a human health risk assessment of polycyclic aromatic hydrocarbons(PAHs)was conducted using the model outlined in the US EPA Exposure Assessment Guidelines.The results showed that the total carcinogenic risks of naphthalene in surface samples from the main steelmaking plant and heating bay,benzo(a)pyrene in coke oven samples,and benzo(b)fluoranthene,benzo(a)pyrene,and dibenzo(a,h)anthracene in cast steel plant samples exceeded the acceptable carcinogenic risk level of 10-6.Additionally,the hazard indices of naphthalene in main steelmaking plant samples and benzo(a)pyrene in cast steel plant samples exceeded the acceptable hazard quotient(HQ)of 1.To protect the human health of persons who have been exposed to the building with an unacceptable risk level for an extended period of time,pollution removal or treatment activities on the contaminated building's surface must be performed.Under the parameters of acceptable carcinogenic risk of 10-6 or hazard quotient of 1,the surface concentration limits of PAHs were determined as 0.96,385.57,3.76,3.99,39.57,0.40,4.02 and 0.40 mg/m2 for naphthalene,chrysene,benzo(a)anthracene,benzo(b)fluoranthene,benzo(k)fluoranthene,benzo(a)pyrene,indene(1,2,3-cd)pyrene and dibenzo(a,h)anthracene.The concentration limits of PAHs are essentially consistent with the soil screening values for Class Ⅰ land of GB 36600-2018,which can be used as a standard for determining the level of PAHs pollution on steel plant structures.关键词
钢铁厂/污染建筑物/表面样品/多环芳烃/风险评估Key words
steel plant/contaminated building/surface samples/polycyclic aromatic hydrocarbons/risk assessment分类
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