摘要
在对介休焦化区和方山对照区春季大气挥发性有机化合物(VOCs)污染特征进行分析的基础上,利用等效丙烯浓度(PEC)法和最大增量反应活性(MIR)法量化了VOCs的臭氧生成潜势(OFP),利用分数气溶胶生成系数(FAC)法和二次有机气溶胶(SOAP)法计算了VOCs的二次有机气溶胶生成潜势(SOAFP),采用健康风险评价法对可能会威胁人体健康的VOCs组分进行了风险评估.在此基础上,结合熵值法和正定矩阵因子(PMF)源解析模型对VOCs的优先控制物种和优先控制污染源进行了判别.结果表明,介休焦化区VOCs污染严重,总VOCs(TVOCs)浓度是方山的2.7倍.介休焦化区VOCs组成具有明显的烷烃占比低而芳香烃和烯烃占比高的特点.介休的OFP、SOAFP与健康风险都远高于方山,分别是方山的3.0、8.9和8.8倍,对介休OFP、SOAFP和健康风险影响最大的物种分别为乙烯、甲苯和苯,削减烯烃和芳香烃的排放是控制介休二次生成与健康风险的有效途径.焦化源(32.4%)是介休VOCs的主要来源,其次为汽油型尾气源(29.0%)和溶剂使用源(16.9%),其中焦化源是介休一级控制污染物苯和乙烯的主要来源,贡献高达74.1%和98.9%,汽油型尾气源(52.0%)和溶剂使用源(31.3%)是一级控制污染物甲苯的主要来源.
This work analyzed the pollution characteristics of volatile organic compounds(VOCs)collected from Jiexiu(JX)and Fangshan(FS).Ozone formation potential(OFP)of VOCs was quantified by the propylene equivalent concentration(PEC)method and maximum incremental reactivity(MIR)method.The fractional aerosol coefficient(FAC)method and the secondary organic aerosol potential(SOAP)method were used to calculate the secondary organic aerosol formation potential(SOAFP)of VOCs.Meanwhile,health risks of toxic VOCs were evaluated via health risk assessment method.Furthermore,combined with the entropy method and positive matrix factorization(PMF)source apportionment model,the priority control species and the priority control pollution sources of VOCs were identified.The results showed that the concentration of total volatile organic compounds(TVOCs)in Jiexiu coking area was 2.7 times higher than that of Fangshan.The VOCs in Jiexiu were characterized by a low proportion of alkanes and high proportions of aromatics and alkenes.OFP,SOAFP,and health risks in Jiexiu were 3.0,8.9,and 8.8 times higher than those of Fangshan,respectively.Reduction of alkenes and aromatics emissions will be an effective way to control secondary pollutants and health risks in Jiexiu.Coking was the main source of VOCs(32.4%),followed by gasoline exhaust(29.0%)and solvent using(16.9%)in Jiexiu.Among,coking was also the main source of benzene and ethene,which were the primary pollutants controlled in Jiexiu,contributing up to 74.1%and 98.9%,respectively.While gasoline exhaust(52.0%)and solvent using(31.3%)were the main sources of the primary controlled pollutant toluene.
作者
李宏艳
张琰茹
付国
黄时丹
李宏宇
崔阳
高雪莹
何秋生
白京霭
张国忠
温彪
LI Hong-yan;ZHANG Yan-ru;FU Guo;HUANG Shi-dan;LI Hong-yu;CUI Yang;GAO Xue-ying;HE Qiu-sheng;BAI Jing-ai;ZHANG Guo-zhong;WEN Biao(School of Environment and Resources,Taiyuan University of Science and Technology,Taiyuan 030024,China;National Research Center for Environmental Analysis and Measurement,Environmental Development Center of the Ministry of Ecology and environment,Beijing 100029,China;Key Laboratory for Environmental Pollution Prediction and Control,Gansu Province,College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;Fenner School of Environment and society,Australian National University,Canberra ACT 2600,Australia)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2024年第3期1234-1243,共10页
China Environmental Science
基金
国家自然科学基金资助项目(22076135,41501543)
山西省基础研究计划项目(20210302124474,202103021223300)
太原科技大学教学改革创新项目(XJ2021032)。
关键词
VOCS
焦化污染
熵值法
二次生成
健康风险
源解析
volatile organic compounds
coking pollution
entropy evaluation method
secondary generation
health risk
source appointment
