新乡市环境空气中挥发性有机物(VOCs)污染特征及来源解析

Characteristics and Sources Apportionment of Volatile Organic Compounds(VOCs) in Xinxiang

2018年4月—9月,对新乡市环境空气中70种VOCs进行监测,分析了VOCs浓度水平、组成特征、臭氧生成潜势及来源。结果表明,新乡市环境空气中VOCs浓度范围为27.25~289.18μg/m3,平均浓度为117.23μg/m3,以醛酮类和烷烃为主,表现为醛酮类>烷烃类>芳香烃>烯炔烃,主要来源于机动车尾气及燃烧源(贡献比为37.609%)以及溶剂使用(贡献比为16.791%)。环境空气中VOCs的臭氧生成潜势贡献表现为醛酮类>芳香烃>烯炔烃>烷烃类。

From April to October 2018, the authors observed the atmospheric VOCs in Xinxiang and analyzed the concentration level, ozone formation potentials and sources of the VOCs. The results showed that the average concentration of 70 kinds of atmospheric VOCs was 117.23 μg/m 3 ( range from 27.25 ~289.18 μg/m 3 ) in Xinxiang. The VOCs were mainly composed of carbonyl compounds and alkanes (specifically carbonyl compounds, alkanes, aromatic hydrocarbons, olefins and alkynes in descending order). These VOCs mainly came from vehicle emission and fuel combustion, solvent evaporation sources (37.609% and 16.791% respectively). The ozone formation potential (OFP) of all kinds of VOCs in the atmosphere were ranked in descending order as carbonyl compounds, aromatic hydrocarbons, olefins and alkynes, alkanes.