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| 西安南郊地区冬季VOCs反应活性及健康风险评价 |
| Reactivity and Health Risk Assessment of VOCs in Winter in Southern Suburbs of Xian |
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| DOI： |
| 中文关键词: VOCs O3生成潜势 二次有机气溶胶 健康风险评价 西安市 |
| 英文关键词: VOCs Ozone formation potential Secondary organic aerosol Health risk assessment Xian |
| 基金项目:国家重点研发计划大气专项基金资助项目（2016YFC0207800）；陕西省教育厅重点科学研究计划基金资助项目（21JT025，20JT042） |
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| 中文摘要: |
| 于2020年12月—2021年2月监测西安市南郊地区55种VOCs组分，采用最大增量反应活性系数法和气溶胶生成系数法分别计算VOCs中的O3及二次有机气溶胶的生成潜势，并做健康风险评价。结果表明，VOCs监测结果为烷烃类＞芳香烃类＞醛酮类＞烯烃类＞炔烃类。综合考虑物种反应活性，对/间二甲苯、乙烯和己醛是对O3生成贡献最大的3种组分，二次有机气溶胶生成潜势贡献率的前三分别为对/间二甲苯、甲苯和乙苯。优先控制芳香烃类、醛酮类和烯烃类化合物的排放是改善西安市冬季O3污染的关键，苯和乙苯对人体存在可能的致癌风险，未来应加强防控。 |
| 英文摘要: |
| From December 2020 to February 2021， 55 kinds of VOCs in the southern suburbs of Xian were monitored. The formation potential of O3 and secondary organic aerosols in VOCs was calculated by maximum incremental reactivity coefficient and aerosol formation coefficient， respectively， and the health risks were evaluated. Results showed that the concentration of VOCs ranked as alkanes＞aromatics＞aldehydes/ketones＞alkenes＞alkynes. Considering species reactivity， p /m xylene， ethylene and hexanal were the top three contributors to the formation of O3， and p xylene， toluene and ethylbenzene were the top three contributors to the formation of secondary organic aerosols. Priority control of aromatic hydrocarbons， aldehydes and ketones， alkenes emission was crucial in reducing O3 pollution in winter in Xian. Benzene and ethylbenzene may be carcinogenic risk to human body， and prevention and control measures should be strengthened in the future. |
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