摘要
汽车维修行业尤其是喷涂环节是挥发性有机物(VOCs)的重要来源.该类企业具有数量多、分布广泛、VOCs排放不连续等特点.汽车维修企业根据规模可以分为一、二类汽车整车维修企业和三类汽车综合小修及专项维修业户.本研究遴选了陕西省三原县12家不同规模汽修企业,研究了其涉气排放环节的VOCs组分特征,并计算其臭氧生成潜势(OFP).结果显示,VOCs排放浓度呈现出二类汽修企业((75111±5761)×10^(-9))>一类汽修企业((31959±4738)×10^(-9))>三类汽修企业((24334±3278)×10^(-9))的趋势,需重点关注二类汽修企业VOCs减排.组分特征方面,汽修行业排放的VOCs主要为含氧挥发性有机物(OVOCs,41.2%±7.3%),其次是芳香烃(25.3%±1.1%);臭氧生成潜势(OFP)与VOCs浓度显示出相同趋势:二类汽修企业(359.5 mg·m^(-3))>一类汽修企业(251.7 mg·m^(-3))>三类汽修企业(188.8 mg·m^(-3)),芳香烃对OFP贡献值最高(61.3%±6.4%),其次是烯烃(28.7%±6.1%),减少汽修VOCs排放对控制臭氧生成具有重要意义.维修环节方面,抹腻子((30794±678)×10^(-9))和喷漆((72512±426)×10^(-9))过程均产生大量VOCs,是汽修企业VOCs排放的重要来源,主要为OVOCs(46.2%±1.1%)和芳香烃(24.5%±2.9%).不同汽修原料表现出不同的VOCs源谱特征,主要为OVOCs(39.3%~73.5%),其次是芳香烃(19.1%~21.7%),烷烃、烯烃、卤代烃贡献占比均低于10%.汽修原料源谱数据可为精确源解析提供数据基础,对不同规模汽修企业VOCs排放的研究可为三原县汽修企业VOCs减排政策的制定提供科学依据.
The automotive repair industry,especially the painting process,is a significant contributor to the emission of Volatile Organic Compounds(VOCs).These enterprises are numerous,widely distributed,and emit VOCs intermittently.Auto repair enterprises can be categorized into first and second-class whole vehicle repair enterprises and third-class general small repair and specialized repair businesses.This study focused on 12 auto repair enterprises in Sanyuan County to investigate the characteristics of VOC emissions in the auto repair processes and calculate their Ozone Formation Potential(OFP).The results indicate that the VOC emission concentration from second-class auto repair enterprises((75111±5761)×10^(-9))was higher than that of first-class((31959.5±4738)×10^(-9))and third-class enterprises((24334.2±3278)×10^(-9)).It is crucial to prioritize the reduction of VOC emissions from second-class auto repair companies.In terms of component characteristics,the main VOCs emitted by the auto repair industry are Oxygenated VOCs(OVOCs,41.2%±7.3%),followed by aromatics(25.3%±1.1%);the trend of OFP was similar pattern as the VOC concentration:second-class auto repair enterprises(359.5 mg·m^(-3))>first-class(251.7 mg·m^(-3))>third-class(188.8 mg·m^(-3)),with aromatic hydrocarbons contributing the most to OFP(61.3%±6.4%),followed by alkenes(28.7%±6.1%).Reducing VOC emissions from auto repair processes is of significant importance in controlling ozone generation.Regarding repair processes,both puttying((30794±678)×10^(-9))and painting((72512±426)×10^(-9))result in a substantial amount of VOC emissions,which are major sources of VOC emissions from auto repairs companies,primarily consisting of OVOCs(46.2%±1.1%),followed by aromatics(24.5%±2.9%).Different auto repair materials exhibit distinct source profiles,with VOC emissions mainly comprising OVOCs(39.3%~73.5%),followed by aromatics(19.1%~21.4%),while lower concentrations of alkanes,alkenes,and halogenated hydrocarbons were observed,each accounting for less
作者
刘涛
沈振兴
何昆
孙健
张斌
徐红梅
彭勤
LIU Tao;SHEN Zhenxing;HE Kun;SUN Jian;ZHANG Bin;XU Hongmei;PENG Qin(Department of Environmental Science and Engineering,School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049)
出处
《环境科学学报》
CAS
CSCD
北大核心
2024年第10期103-110,共8页
Acta Scientiae Circumstantiae
基金
陕西省重点研发计划项目(No.2022ZDLSF06-07)。
关键词
汽修
挥发性有机物
排放特征
臭氧生成潜势
排放源谱
automobile repair
volatile organic compounds
emission characteristics
ozone formation potential
source profile
