乌鲁木齐市大气PM_(2.5)中多环芳烃的健康风险评价

Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in PM_(2.5) in Urumqi

于2019年5月至12月在乌鲁木齐三个点位以每24 h为一个周期采集了97个大气PM_(2.5)样品,对其中的多环芳烃(PAHs)做出分析,结果表明:乌鲁木齐市城区大气PM_(2.5)中PAHs浓度范围处于中等偏低水平,工业区大气PM_(2.5)中PAHs浓度范围处于中等偏高水平。乌鲁木齐市城区大气PM_(2.5)中BaP浓度范围处于中等偏低水平,工业区大气PM_(2.5)中BaP浓度范围处于中等偏高水平。人群终身致癌超额危险度变化趋势与BaP eq变化趋势一致,城市区和郊区均呈现出冬季>秋季>春季>夏季的趋势,工业区呈现出冬季>春季>秋季>夏季的趋势。成人日均暴露剂量和终身致癌超额危险度均高于儿童。乌鲁木齐市三个点位大气PM_(2.5)中PAHs可能对人类预期寿命损失影响分别为:成人0.60 min、0.18 min和2.78 min,儿童为0.39 min、0.81 min和0.12 min。

From May 2019 to December 2019,97 samples of atmospheric PM_(2.5) were collected in Urumqi every 24 hours.The results showed that:The concentration range of PAHs in PM_(2.5) in urban area of Urumqi was in the middle low level,and the concentration range of PAHs in PM_(2.5) in industrial area was in the middle high level.The concentration range of BaP in PM_(2.5) of Urumqi city was in the middle low level,and the concentration range of BaP in PM_(2.5) of industrial area was in the middle high level.The trend of excess risk of lifetime cancer was consistent with that of BaP eq.The trend of excess risk of lifetime cancer was winter>autumn>spring>summer in urban and suburban areas,and the trend of excess risk of lifetime cancer was winter>spring>autumn>summer in industrial areas.The excess risk of ADD and lifetime cancer in adults were higher than that in children.The loss of life expectancy caused by PAHs in PM_(2.5) in Urumqi was 0.60 min,0.18 min and 2.78 min for adults,and 0.39 min,0.81 min and 0.12 min for children.