| Air quality deterioration has drawn extensive attention in the Pearl River Delta (PRD)region, one of the most rapidly developing regions in China. Frequent haze days and ozoneepisode have caused the deterioration of air quality and visibility, leading to undesirableimpact on the city’s development and human health. Volatile organic compounds (VOCs)played an important role in these air pollution formations and solvent-related industries werethe second contributor in theanthropogenic emission sources. For better understandings ofthe characteristics oftheVOC emission,the relationship between emission and solvent-relatedraw and auxiliary materials using in the typical industry sectors, and the fundamentalinformation for developingcontrol strategies and identifying source contributions,industrysector-based VOC source profileswere established for the this region, based upon emissionsamples directly measured from inside manufacturing workshops and exhaust chimneys undernormal operating conditions.This paper estimated the VOC emissions from typical industrial sources in the PRDregion. The resulsts showed that printing wood furniture manufacturing, shoemaking, paintand coating manufacturing and metal surface coating shared large contributions to the totalVOC emissions. These source were targeted for developing the source profiles of typicalindustrial sources, with letterpress, offset lithographic and package gravure printing processesindividually indentified due to obvious differencesin printing processes.Source samples werecollected by2-liter stainless steel canisters with chimney discharge or fugitive emissionsampling equipments.72qualifiedsamplesfrom the total100samples were selectedand263VOC species were detected following EPA TO-14and TO-15methods,dividing into sixgroups, namely alkenes, alkanes, aromatics, oxygenated VOCs, halohydrocarbons and others.The results indicated that (1) source characteristics exhibited differences among fivesectors or processes, especially in printing and shoemaking sectors. Benzene and toluenewere the major species of letterpress printing, while ethyl acetate and isopropyl alcohol wereimportant compounds of the other two printing processes.2-butanone and acetone were majorspecies for the shoemaking sector;(2) Similar source profile patterns were found for paint and coating manufacturing, woodfurniture manufacturing, and metal surface coatingsectors, with aromatics as the mostabundant species, and oxygenated VOCs as the second contributor in the profiles;(3) Oxygenated VOCs were one of most significant VOC groups for all source profiles of five industry sectors in the PRD region, but not reported in other regions;(4) Differences in fugitive emission and chimney discharge profiles may exist, butsimilar patterns in both profiles were observed in most sectors and processes in this study.Comparisons with previously similar studies in different regions showed that there wereobvious differences in source profiles among different regions, indicating the importance ofdeveloping local source profiles. |
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