首页|嘉兴市冬季VOCs污染特征及健康风险评估

嘉兴市冬季VOCs污染特征及健康风险评估

扫码查看
文章于2021年1月1日-2月28日期间对嘉兴市114种VOCs组分进行在线连续监测,分析VOCs浓度水平及组分特征,评估臭氧生成潜势(OFP),通过后向轨迹和特征物种对比值等探讨VOCs的来源,并开展苯系物健康风险评估.结果表明,监测期间嘉兴市VOCs平均体积浓度为38.16×10-9,烷烃、含氧有机物(OVOCs)、卤代烃、烯烃、芳香烃和炔烃分别占比31.05%、20.78%、19.61%、13.56%、12.07%和2.93%,春节期间VOCs平均体积浓度为16.82×10-9.从日变化看,烷烃、烯烃、芳香烃、卤代烃的日变化趋势与VOCs一致,OVOCs呈现波动上升.对OFP进行计算,监测期间烯烃和芳香烃OFP贡献最大,关键活性物种为甲苯、丙烯、间/对-二甲苯、乙烯等,主要受溶剂挥发和机动车排放影响;春节期间烯烃和烷烃OFP贡献最大,关键活性物种为丙烯、反-2-丁烯、顺-2-丁烯等,主要受交通源影响.通过特征物种对评价、后向轨迹和潜在源贡献因子分析法,得出监测期间嘉兴市VOCs受传输和本地排放影响,其中烷烃、卤代烃、烯烃、芳香烃受到区域传输和本地排放共同影响,OVOCs和炔烃主要为本地排放.监测期间,嘉兴市各苯系物的非致癌风险危害商值在安全阈值之内,但苯和间/对二甲苯的致癌风险值超出安全阈值.以上结果可为嘉兴市冬季VOCs污染管控和空气质量提升提供理论依据.
Pollution Characteristics and Health Risk Assessment of Volatile Organic Compounds in Winter in Jiaxing
114 VOCs were continuously monitored online from January 1st to February 28th,2021,to analyze the concentra-tion levels and component characteristics of VOCs in Jiaxing,and evaluate ozone formation potential(OFP).The source of VOCs was explored by backward trajectory method and calculation of characteristic species pair ratio.Furthermore,health risk assessment of benzene series was carried out.The results showed that the average volume concentration of VOCs was 38.16x10-9,and the proportion of alkanes,oxygenated volatile organic compounds(OVOCs),halogenated hydrocarbons,olefins,aromatics and alkyns were 31.05%,20.78%,19.61%,13.56%,12.07%and 2.93%,respectively.The average volume concentration of VOCs during the Spring Festival was 16.82x10-9.The diurnal variation of alkanes,alkenes,aromatic hydro-carbons and halogenated hydrocarbons was consistent with VOCs,while OVOCs showed a fluctuating increase.As shown in OFP results,olefins and aromatic hydrocarbons contributed the most to OFP,and the crucial active species were toluene,propylene,m-p-xylene and ethylene,which were mainly affected by solvent volatilizing.During the Spring Festival,olefins and alkanes contributed the most to OFP,and the crucial active species were propylene,trans-2-butene and cis-2-butene,which were mainly affected by traffic sources.Combining the investigation of characteristic species pair ratio,backward trajec-tory and potential source contribution function,it can be concluded that VOCs in Jiaxing should be affected by transport and local emission.Among them,alkanes,halogenated hydrocarbons,olefins and aromatic hydrocarbons were jointly affected by regional transport and local emission,and OVOCs and alkynes were mainly local emission.In addition,the non-carci-nogenic risk hazard quotient value of benzene series were within the safety threshold,whereas the carcinogenic risk value of benzene and m-xylene/p-xylene were beyond the safety threshold.The above findings can serve as a theoretical foundation for the control of VOCs pollution and the improvement of air quality during winter in Jiaxing.

VOCsozone formation potentialhealth risk assessmentbackward trajectoryJiaxing

熊传芳、杨晓霞、张颖龙、陈建挺、李莉、唐倩

展开 >

嘉兴市生态环境应急监控与事故调查中心,浙江 嘉兴 314000

浙江省嘉兴生态环境监测中心,浙江 嘉兴 314000

嘉兴市智慧环保与机动车污染防治中心,浙江 嘉兴 314000

浙江省生态环境监测中心,浙江 杭州 310012

展开 >

VOCs 臭氧生成潜势 健康风险评价 后向轨迹 嘉兴

浙江省生态环境科研和成果推广项目嘉兴市民生科技创新研究项目

2022HT00212023AD31071

2024

环境科学与技术
湖北省环境科学研究院

环境科学与技术

CSTPCD北大核心
影响因子:0.943
ISSN:1003-6504
年,卷(期):2024.47(7)