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Exposure profiles and source identifications for workers exposed to crystalline silica during a municipal waste incinerator relining period.
J Hazard Mater. 2008 Jun 15; 154(1-3):469-75.JH

Abstract

In this study, respirable crystalline silica exposures to furnace relining workers of 7 exposure groups were assessed by conducting personal respirable dust samplings. All possible pollutant sources were identified for each exposure group through field observations, and bulk samples were randomly collected from each identified pollutant source. All collected samples were analyzed for their tridymite, cristobalite, and quartz contents by using the X-ray diffraction method. Results show that quartz was the only detectable crystalline silica content. We found that the resultant respirable quartz exposure levels presented in sequence for the 7 exposure groups (sand blasting>bottom ash cleaning>wall demolishing>relining>others>grid repairing>scaffold establishing) were different from that of the corresponding respirable dust exposure levels (bottom ash cleaning>wall demolishing>sand blasting>relining>grid repairing>scaffold establishing>others). 87.3-100% of workers' respirable quartz exposures of the 7 exposure groups exceeded the TLV-TWA (0.025 mg m(-3)) indicating appropriate control strategies should be taken immediately. By comparing the fractions of quartz contained in personal respirable dust samples with that contained in all possible pollutant sources for each exposure group, this study identified main pollutant sources for each exposure group as: bottom ash cleaning and scaffold establishing: bottom ash; sand blasting: blasting sand; wall demolishing: refractory cement+wall ash; wall relining: refractory brick; grid repairing: wall ash+refractory cement; grid repairing: wall ash+refractory cement; others: blasting sand+bottom ash. Finally, effective control strategies were proposed for exposure reduction by using above information together with our field observations.

Authors+Show Affiliations

Institute of Occupational Safety and Health, Council of Labor Affairs, Executive Yuan, 99, Lane 407, Heng-Ke Road, Shijr, Taipei 217, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18063296

Citation

Shih, Tung-Sheng, et al. "Exposure Profiles and Source Identifications for Workers Exposed to Crystalline Silica During a Municipal Waste Incinerator Relining Period." Journal of Hazardous Materials, vol. 154, no. 1-3, 2008, pp. 469-75.
Shih TS, Lu PY, Chen CH, et al. Exposure profiles and source identifications for workers exposed to crystalline silica during a municipal waste incinerator relining period. J Hazard Mater. 2008;154(1-3):469-75.
Shih, T. S., Lu, P. Y., Chen, C. H., Soo, J. C., Tsai, C. L., & Tsai, P. J. (2008). Exposure profiles and source identifications for workers exposed to crystalline silica during a municipal waste incinerator relining period. Journal of Hazardous Materials, 154(1-3), 469-75.
Shih TS, et al. Exposure Profiles and Source Identifications for Workers Exposed to Crystalline Silica During a Municipal Waste Incinerator Relining Period. J Hazard Mater. 2008 Jun 15;154(1-3):469-75. PubMed PMID: 18063296.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Exposure profiles and source identifications for workers exposed to crystalline silica during a municipal waste incinerator relining period. AU - Shih,Tung-Sheng, AU - Lu,Pao-Yin, AU - Chen,Ching-Hwa, AU - Soo,Jhy-Charm, AU - Tsai,Ching-Lang, AU - Tsai,Perng-Jy, Y1 - 2007/10/22/ PY - 2007/01/20/received PY - 2007/10/15/revised PY - 2007/10/15/accepted PY - 2007/12/8/pubmed PY - 2008/7/30/medline PY - 2007/12/8/entrez SP - 469 EP - 75 JF - Journal of hazardous materials JO - J Hazard Mater VL - 154 IS - 1-3 N2 - In this study, respirable crystalline silica exposures to furnace relining workers of 7 exposure groups were assessed by conducting personal respirable dust samplings. All possible pollutant sources were identified for each exposure group through field observations, and bulk samples were randomly collected from each identified pollutant source. All collected samples were analyzed for their tridymite, cristobalite, and quartz contents by using the X-ray diffraction method. Results show that quartz was the only detectable crystalline silica content. We found that the resultant respirable quartz exposure levels presented in sequence for the 7 exposure groups (sand blasting>bottom ash cleaning>wall demolishing>relining>others>grid repairing>scaffold establishing) were different from that of the corresponding respirable dust exposure levels (bottom ash cleaning>wall demolishing>sand blasting>relining>grid repairing>scaffold establishing>others). 87.3-100% of workers' respirable quartz exposures of the 7 exposure groups exceeded the TLV-TWA (0.025 mg m(-3)) indicating appropriate control strategies should be taken immediately. By comparing the fractions of quartz contained in personal respirable dust samples with that contained in all possible pollutant sources for each exposure group, this study identified main pollutant sources for each exposure group as: bottom ash cleaning and scaffold establishing: bottom ash; sand blasting: blasting sand; wall demolishing: refractory cement+wall ash; wall relining: refractory brick; grid repairing: wall ash+refractory cement; grid repairing: wall ash+refractory cement; others: blasting sand+bottom ash. Finally, effective control strategies were proposed for exposure reduction by using above information together with our field observations. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18063296/Exposure_profiles_and_source_identifications_for_workers_exposed_to_crystalline_silica_during_a_municipal_waste_incinerator_relining_period_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)01495-1 DB - PRIME DP - Unbound Medicine ER -