公共场所BTEX的污染特征、源解析及健康风险

Pollution survey and health risk of BTEX in indoor air of public places

分析评价了杭州市商场、超市、影院、车站候车室等公共场所室内空气中BTEX的污染特征、来源及健康风险.结果表明,公共场所中BTEX的总平均浓度为30.68～217.74μg·m-3,商场的污染最重,车站候车室的污染最轻;甲苯与BTEX总浓度之间具有较好的线性关系,可作为公共场所BTEX污染的代表物;候车室BTEX污染主要受室外污染源的影响,而在其它公共场所中,室内污染源占主导地位,鞋用胶粘剂是商场BTEX的主要污染来源;商场空气中苯对男性和女性工作人员的致癌风险分别为5.38×10-6和5.57×10-6,超过了美国EPA制定的人体致癌风险值(1×10-6).

Levels of benzene, toluene, ethylbenzene and the xylenes （BTEX） in different indoor microenvironments such as shopping centers, super markets, cinemas and station waiting rooms were investigated in Hangzhou. It was indicated that the total concentration of BTEX was 30.68 - 217.74 μg·m^-3. The level in the shopping centers was the highest while in the waiting rooms was the lowest. It is feasible to use the level of toluene to represent the level of total BTEX. The concentration of BTEX in the waiting rooms was chiefly determined by the outdoor source while in other places the indoor source provided a major contribution. The pastern used in shoes dominated the concentration in shopping centers. The cancer risk of benzene in the shopping centers exceeded 1 ×10^-6