室内外灰尘中多氯联苯浓度及人体健康风险评估

分析了湖南某国道附近室内外灰尘中的多氯联苯（polychlorinated biphenyls, PCBs）浓度.其中室内∑PCBs浓度为156-507ng/g，中位值为362ng/g；室外灰尘中∑PCBs浓度为106-955ng/g，中位值为406ng/g.室内外灰尘中PCBs都是以Penta-PCBs和Hexa-PCBs为主.人体健康风险评估的结果显示:在采用高风险斜率因子时，人体通过摄取灰尘中PCBs的致癌风险取值范围为1.28-2.97×10-7，中位值为2.31×10-7；在采用中风险斜率因子时，取值范围为6.38×10-8-1.49×10-7，中位值为1.16×10-7，皆低于可接受的风险水平（1×10-6）.

Risk Assessment of Human Exposure to Polychlorinated Biphenyls via Indoor and Outdoor Dust

The polychlorinated biphenyls (PCBs) in indoor and outdoor dust around the traffic road in Hunan Province were sampled and detected. The ∑PCBs in indoor dust ranged from 156-507ng/g, with a median of 362ng/g, and the ∑PCBs in outdoor dust ranged from 106-955ng/g, with a median of 406ng/g. Similar pattern of PCBs was observed in indoor and outdoor dust, which was dominated by Penta-PCBs and Hexa-PCBs. Risk assessment showed that cancer risk of human exposure to PCBs via dust varied from 1.28-2.97×10-7, with a median of 2.31×10-7, when the high slope factor was employed, and the risk ranged from 6.38×10-8-1.49×10-7, with a median of 1.16×10-7，when the central slope factor was employed. All of the risk values were below the acceptable risk level (1×10-6), which may indicate the relative safety of the present environment.