常州市某区域VOCs污染特征研究以及基于观测的选点优化  

Study on the Characteristics of VOCs Pollution and the Optimization of Site Selection Based on Observation in a Certain Area of Changzhou

作　　者：张冰洁 王云宇 Zhang Bingjie;Wang Yunyu(Jiangsu Changhuan Environmental Science Co.,Ltd.,Changzhou 213000,China)

机构地区：[1]江苏常环环境科技有限公司,江苏常州213000

出　　处：《广东化工》2025年第4期111-114,共4页Guangdong Chemical Industry

基　　金：常州市科技支撑计划(社会发展)基金项目(CE20235030)。

摘　　要：为探究常州市区域挥发性有机物(VOCs)污染特征、优化长期监测点位,本研究基于区域现有的空气质量监测体系,在2018年对10个特征点位采集了80个离线环境空气样品,并对其臭氧生成潜势(OFP)进行了环境效应分析。监测过程发现了不同时间(上午、下午)和空间范围VOCs浓度及化学组成差异显著,并确定了VOCs的来源特征和活性变化,其中西夏墅政府站VOCs浓度水平最高,烷烃和挥发性含氧有机物(OVOCs)是区域VOCs组成中最主要的组分,且5月烷烃和OVOCs的浓度显著低于6月。新龙湖公园VOCs的臭氧生成贡献高于其他站点。T/B比值表明甲苯排放主要受工业排放、机动车尾气以及溶剂使用的影响较大。研究借助发散系数CD分析站点间组分差异,以期提供合理的点位保留方案。结果表明大部分站点的化学组成差异显著,建议合并青龙中学和金牛村站点,保留其他点位。In order to explore the pollution characteristics of volatile organic compounds(VOCs)and optimize long-term monitoring sites in a certain area of Changzhou,based on the existing air quality monitoring system,80 offline ambient air samples were collected from 10 characteristic points in 2018,and the environmental effects of ozone formation potential(OFP)were analyzed.The monitoring process found the differences in VOCs concentration and chemical composition in different time(morning and afternoon)and spatial ranges,and determined the source characteristics and activity changes of VOCs.Among them,the VOCs concentration level of Xixiashu government station was the highest.Alkanes and Oxygenated Volatile Organic Compounds(OVOCs)were the most important components of VOCs composition in Xinbei Area.The concentration of alkanes and OVOCs in May was significantly lower than that in June.The ozone generation contribution of VOCs in Xinlong Lake Park were higher than other sites.The T/B ratio method shows that toluene emissions are mainly affected by industrial emissions,motor vehicle exhaust and solvent use.The CD divergence coefficient method was used to analyze the component differences between sites in order to provide a reasonable point retention scheme.The results show that the chemical composition of most sites is significantly different.It is recommended to merge Qinglong Middle School and Jinniu Village sites and retain other sites.

关 键 词：挥发性有机物(VOCs) 时空特征差异 臭氧生成潜势(OFP) 发散系数CD 点位优化 

分 类 号：X511[环境科学与工程—环境工程] X84