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通过对焦化作业环境空气中苯污染特征的研究和致癌风险的评价,发现焦化作业环境中苯的含量占总有机物成分的比重较高;浓度依布煤区、推焦区/拦焦区、燃管区顺序递减,布煤区污染最严重;布煤区、推焦区/拦焦区、燃管区成年男性职工终生苯的致癌风险都远远超过1.00×10-6的安全限值。提示即使在符合国家标准限值的情况下,焦化作业环境空气中苯的污染仍有较高的致癌风险。
Through the research on the benzene pollution characteristics in the air of coking operation environment and the evaluation of the carcinogenic risk, it is found that the proportion of benzene in the coking operation environment occupies a higher proportion of the total organic components; the concentration of benzene in the coal area, poking area / The decreasing order of the district and the most serious pollution in the coal cloth area; the carcinogenic risks of the lifetime benzene of adult male workers in the coal cloth area, poking area, blocking coke area and fuel burning area far exceed the safety limit of 1.00 × 10-6. It is suggested that the benzene contamination in the ambient air of coking operation still poses a high carcinogenic risk even in compliance with the national standard limits.