[南京北郊大气中BTEX的变化特征及健康风险评估]
[Variation Characteristics and Health Risk Assessment of BTEX in the Atmosphere of Northern Suburb of Nanjing].
作者信息
Zhang Yu-Xin, An Jun-Lin, Wang Jian-Yu, Wang Jun-Xiu, Shi Yuan-Zhe, Liu Jing-da, Liang Jing-Shu
机构信息
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Joint International Research Laboratory of Climate and Environment Change(ILCEC), Key Laboratory of Meteorological Disaster, Ministry of Education(KLME), Nanjing University of Information Science & Technology, Nanjing 210044, China.
出版信息
Huan Jing Ke Xue. 2017 Feb 8;38(2):453-460. doi: 10.13227/j.hjkx.201607108.
BTEX concentrations were determined by GC5000 online gas chromatography in the atmosphere of the north suburb of Nanjing in March 2013 to February 2014, using the EPA human exposure analysis evaluation method for benzene series compounds of volatile organic compounds (VOCs) in health risk assessment. The results showed that the total amount of BTEX showed the variation characteristics of spring > winter > autumn > summer. BTEX concentration was higher in the periods of 07:00-10:00 and 17:00-20:00, and the lowest was detected between 13:00-15:00; At the weekend, the concentration of BTEX was higher than on the working day. The sources of BTEX included traffic sources, industrial sources and solvent evaporation. The HQ of BTEX in all four seasons showed the order of benzene > xylene > ethylbenzene > toluene, and the HQ risk values were within the safety range in all analysis periods. The distribution of value was winter > autumn > spring > summer, and was higher than the safety threshold for all the analyses, indicating the existence of carcinogenic risk.
采用美国环境保护局（EPA）对挥发性有机化合物（VOCs）中苯系物的人体暴露分析评估方法，于2013年3月至2014年2月期间，通过GC5000在线气相色谱法测定了南京北郊大气中的BTEX浓度。结果表明，BTEX总量呈现出春季＞冬季＞秋季＞夏季的变化特征。BTEX浓度在07:00 - 10:00和17:00 - 20:00时段较高，在13:00 - 15:00时段检测到的浓度最低；在周末，BTEX浓度高于工作日。BTEX的来源包括交通源、工业源和溶剂蒸发。四季中BTEX的危害商（HQ）均呈现苯＞二甲苯＞乙苯＞甲苯的顺序，且在所有分析时段内HQ风险值均在安全范围内。 值的分布为冬季＞秋季＞春季＞夏季，并且在所有分析中 均高于安全阈值，表明存在致癌风险。
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