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Article: Occupational exposure to volatile organic compounds and mitigation by push-pull local exhaust ventilation in printing plants

TitleOccupational exposure to volatile organic compounds and mitigation by push-pull local exhaust ventilation in printing plants
Authors
KeywordsComputational fluid dynamics (CFD)
Gas chromatography/mass spectrometry (GC/MS)
Printing
Push-pull local exhaust ventilation (LEV)
Volatile organic compounds (VOCs)
Issue Date2005
PublisherNihon Sangyo Eisei Gakkai. The Journal's web site is located at http://joh.med.uoeh-u.ac.jp
Citation
Journal Of Occupational Health, 2005, v. 47 n. 6, p. 540-547 How to Cite?
AbstractThe extensive use of multiple organic solvents in offset lithographic printing causing high emissions of volatile organic compounds (VOCs) indeed poses a serious risk to printing workers' health. In this study, indoor air quality (IAQ) assessments were carried out in seven printing plants and the main objectives were to understand the effect of VOC emissions on IAQ and develop effective mitigation measures to protect workers. The thorough gas chromatography/mass spectrometry (GC/MS) measurements showed that although a variety of VOCs were presented in the indoor air, none of them was found close to individual 8-h time-weighted average (TWA) of the occupational exposure limit (OEL). The additive effect was also found below the critical value of unity. However, short-term personal exposure to total volatile organic compounds (TVOCs) was exceedingly high when a print worker carried out blanket and ink roller cleaning procedures. Therefore, the occupational health risk was mainly due to repeated short-term exposures during intermittent VOC-emitting procedures rather than long-term exposure to background VOCs. Push-pull local exhaust ventilation (LEV) was identified as an effective mitigation measure. Computational fluid dynamics (CFD) analysis was conducted to study the push-pull LEV operation. It was found that there existed a threshold LEV air flow rate for an abrupt reduction in the worker's exposure to VOCs. The reduction was less sensitive when the LEV airflow was further increased beyond the threshold. These phenomena, consistent with experimental results reported by other investigators, were explained by detailed CFD analysis showing the competition between the general ventilation and the push-pull LEV to become the dominating driving force for the resultant local flow pattern.
Persistent Identifierhttp://hdl.handle.net/10722/75929
ISSN
2015 Impact Factor: 1.446
2015 SCImago Journal Rankings: 0.546
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLeung, MKHen_HK
dc.contributor.authorLiu, CHen_HK
dc.contributor.authorChan, AHSen_HK
dc.date.accessioned2010-09-06T07:15:56Z-
dc.date.available2010-09-06T07:15:56Z-
dc.date.issued2005en_HK
dc.identifier.citationJournal Of Occupational Health, 2005, v. 47 n. 6, p. 540-547en_HK
dc.identifier.issn1341-9145en_HK
dc.identifier.urihttp://hdl.handle.net/10722/75929-
dc.description.abstractThe extensive use of multiple organic solvents in offset lithographic printing causing high emissions of volatile organic compounds (VOCs) indeed poses a serious risk to printing workers' health. In this study, indoor air quality (IAQ) assessments were carried out in seven printing plants and the main objectives were to understand the effect of VOC emissions on IAQ and develop effective mitigation measures to protect workers. The thorough gas chromatography/mass spectrometry (GC/MS) measurements showed that although a variety of VOCs were presented in the indoor air, none of them was found close to individual 8-h time-weighted average (TWA) of the occupational exposure limit (OEL). The additive effect was also found below the critical value of unity. However, short-term personal exposure to total volatile organic compounds (TVOCs) was exceedingly high when a print worker carried out blanket and ink roller cleaning procedures. Therefore, the occupational health risk was mainly due to repeated short-term exposures during intermittent VOC-emitting procedures rather than long-term exposure to background VOCs. Push-pull local exhaust ventilation (LEV) was identified as an effective mitigation measure. Computational fluid dynamics (CFD) analysis was conducted to study the push-pull LEV operation. It was found that there existed a threshold LEV air flow rate for an abrupt reduction in the worker's exposure to VOCs. The reduction was less sensitive when the LEV airflow was further increased beyond the threshold. These phenomena, consistent with experimental results reported by other investigators, were explained by detailed CFD analysis showing the competition between the general ventilation and the push-pull LEV to become the dominating driving force for the resultant local flow pattern.en_HK
dc.languageengen_HK
dc.publisherNihon Sangyo Eisei Gakkai. The Journal's web site is located at http://joh.med.uoeh-u.ac.jpen_HK
dc.relation.ispartofJournal of Occupational Healthen_HK
dc.subjectComputational fluid dynamics (CFD)en_HK
dc.subjectGas chromatography/mass spectrometry (GC/MS)en_HK
dc.subjectPrintingen_HK
dc.subjectPush-pull local exhaust ventilation (LEV)en_HK
dc.subjectVolatile organic compounds (VOCs)en_HK
dc.subject.meshAir Pollutants, Occupationalen_HK
dc.subject.meshGas Chromatography-Mass Spectrometryen_HK
dc.subject.meshHong Kongen_HK
dc.subject.meshHumansen_HK
dc.subject.meshIndustryen_HK
dc.subject.meshOccupational Exposureen_HK
dc.subject.meshOrganic Chemicals - analysisen_HK
dc.subject.meshPrintingen_HK
dc.subject.meshSolventsen_HK
dc.subject.meshVentilation - methodsen_HK
dc.subject.meshVolatilizationen_HK
dc.titleOccupational exposure to volatile organic compounds and mitigation by push-pull local exhaust ventilation in printing plantsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1341-9145&volume=47&spage=540&epage=547&date=2005&atitle=Occupational+exposure+to+volatile+organic+compounds+and+mitigation+by+push-pull+local+exhaust+ventilation+in+printing+plantsen_HK
dc.identifier.emailLeung, MKH:en_HK
dc.identifier.emailLiu, CH: chliu@hkucc.hku.hken_HK
dc.identifier.authorityLeung, MKH=rp00148en_HK
dc.identifier.authorityLiu, CH=rp00152en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1539/joh.47.540en_HK
dc.identifier.pmid16369118-
dc.identifier.scopuseid_2-s2.0-32044473035en_HK
dc.identifier.hkuros117493en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-32044473035&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume47en_HK
dc.identifier.issue6en_HK
dc.identifier.spage540en_HK
dc.identifier.epage547en_HK
dc.identifier.isiWOS:000233917700010-
dc.publisher.placeJapanen_HK
dc.identifier.scopusauthoridLeung, MKH=8862966600en_HK
dc.identifier.scopusauthoridLiu, CH=36065161300en_HK
dc.identifier.scopusauthoridChan, AHS=7403168371en_HK

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