在对西安市网吧、KTV、咖啡厅、酒吧4类娱乐场所空气中苯、甲醛浓度监测的基础上，评价其致癌风险。检测结果表明，除咖啡厅空气中苯浓度均值未超过GB／T18883—2002《室内空气质量标准》限值（0．11mg／ms）外，甲醛和其他娱乐场所空气中苯与甲醛的浓度均超过国家规定限值。健康风险表明，西安市娱乐场所男性从业人员面临的苯与甲醛的致癌风险均值分别为6．21×10-5、10．59×10-5，女性则分别为5．46×10-5．9．32×10-5，均超过美国环保局制定的可接受风险值，存在较大致癌风险。%Based on benzene and formaldehyde monitoring performed at representative entertainment venues in Xran City such as Internet cafes, karaoke TV bars, coffee houses and taprooms, their health risk assessment was conducted. The benzene and formaldehyde concentrations in indoor air at entertainment venues in Xran City were all found higher than their relevant limit values specified in the Chinese indoor air quality standard except for mean contents of benzene at coffee houses. It was indicated that the mean carcinogenic risks of benzene and formaldehyde for male employees were at 6.21 ×10-5 and 10.59× 0-2 whilst that for female employees were at 5.46× 10-S and 9.32 × 10-5, respectively, all exceeding the acceptable risk levels set by U. S. EPA. It implied that there have been rather higher carcinogenic risks of benzene and formaldehyde to human health at entertainment venues in Xi＇an City.
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