摘要
对重庆市沙坪坝区环境空气中65种VOCs进行观测,分析VOCs浓度水平、空间分布、日变化特征、组成与来源,开展VOCs与IAQI指数的相关性分析,并对沙坪坝区环境空气中VOCs的健康风险进行评价。结果表明:沙坪坝区环境空气中65种VOCs的平均质量浓度为54.9μg/m3(范围为49.3~60.9μg/m3),与国内其他城市相比处于较低水平;空气中VOCs主要来源于机动车尾气排放,其组成以卤代烷烃、含氧有机物和苯系物为主;空气中VOCs浓度与PM10及PM2.5呈高度线性相关。健康风险评估结果显示,苯对暴露人群存在潜在致癌风险。
This article focuses on the observation of 65 kinds of VOCs （volatile organic compounds）in the ambient air in Shapingba District of Chongqing and the analysis on contents/level, spatialdistribution, daily variation features, components ＆ sources of VOCs. Based on this, an analysishas been conducted on the correlation between VOCs and IAQI（individual air quality index） and anassessment has been made on the health risks caused by VOCs in ambient air. Results show thatthe mass concentration of 65 kinds of VOCs in the ambient air were averaged at 54.9 μg/m3（allowable range is 49.3-60.9μg/m3） in the district, lower than that of other cities of China. VOCsin the air mainly come from the exhaust of motor vehicles, which mainly consists of halogenatedalkenes oxygen-containing organic compounds and benzene series. Concentration of VOCs in air ishighly related with PM10 and PM2.5. According to the results of health risk assessment, thebenzene has a potential carcinogenic risk to people exposed to it.
出处
《中国测试》
CAS
北大核心
2017年第3期43-48,共6页
China Measurement & Test
基金
国家863计划项目(2013AA06A308)
重庆市沙坪坝区决策咨询与管理创新项目(PJ20140043)
关键词
大气
VOCS
污染特征
健康影响评估
atmospheric air
VOCs
pollution features
healthy influence assessment
