摘要目的 了解上海市某石化企业工人苯、甲苯和二甲苯的接触情况,并对其进行职业危害风险评估.方法 收集该石化企业2010～2014年作业场所中苯系物的环境监测数据,以及相关作业工人的一般情况,应用美国国家环境保护署(EPA)吸入风险评估模型进行风险评估,判定苯、甲苯和二甲苯的职业健康风险水平.结果 该石化企业工作场所中苯、甲苯和二甲苯的监测浓度合格率为100％;EPA吸入风险评估模型评估结果显示,苯有较高的致癌性风险,苯、二甲苯的非致癌性风险较大,甲苯非致癌性风险较小.结论 该石化企业苯接触工人的健康风险较大,EPA吸入风险评估模型适用于化工职业病危害风险评估.

abstractsObjective To investigate the exposure to benzene,methylbenzene,and dimethylbenzene in workers in a petrochemical enterprise in Shanghai,China,and to conduct occupational hazard risk assessment.Methods The environmental monitoring data on benzene series in the workplace of this petrochemical enterprise from 2010 to 2014 were collected,as well as workers' general status.The inhalation risk assessment model developed by United States Environmental Protection Agency (EPA) was used for risk assessment to determine the occupational hazard risk level of benzene,methylbenzene,and dimethylbenzene.Results The pass rate of the monitoring concentration of benzene,methylbenzene,and dimethylbenzene in the workplace of this petrochemical enterprise was 100％.The results of the EPA model showed that benzene had a high carcinogenic risk,benzene and dimethylbenzene had a high non-carcinogenic risk,and methylbenzene had a low noncarcinogenic risk.Conclusion The workers exposed to benzene in this petrochemical enterprise have a high health risk,and the EPA model can be used for occupational hazard risk assessment in chemical industry.