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논문 기본 정보

자료유형
학술저널
저자정보
김부욱 (근로복지공단 직업환경연구원)
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한국입자에어로졸학회 PARTICLE AND AEROSOL RESEARCH PARTICLE AND AEROSOL RESEARCH 제17권 제1호
발행연도
2021.1
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1 - 8 (8page)

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The purpose of this study is to assess respirable crystalline silica (RCS) exposure levels in workers who collect and dispose used coal briquette ash (CBA) in sanitation companies that are subcontracted by one medium-sized local government on the collection of municipal household waste (MHW), and to analyze the quartz content in CBA. When the CBA powder that undergone specialized pretreatment in several steps were subjected to mineral identification and quantitative analysis using X-ray diffraction (XRD), it was found that quartz represented 18%, and in addition, mullite, and plagioclase were included. For two CBA collectors, samples were collected by the personal sampling evaluation method. After respirable dust was collected in accordance with the National Institute for Occupational Safety and Health 7500 method, the concentration of quartz was analyzed using XRD. Meanwhile, a portable real-time dust monitor (Sidepak AM520, TSI Inc., USA) was also used to observe the dust exposure level for each time zone and job task. The RCS exposure level of one worker was as high as 0.024 ㎎/㎥, which was the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLV) level. The other worker also exhibited a concentration of 0.013 ㎎/㎥, which was more than half of TLV. The Sidepak results revealed that the work of collecting CBA and loading it onto a vehicle was hardly exposed to the dust of a significant level. It was found, however, that the work of transferring the collected CBA to a container through a conveyor belt was exposed to a very high average respirable dust concentration of 2.238 ㎎/㎥. The results of this study confirmed that quartz, which is crystalline silica and a carcinogen, is contained in CBA, one of municipal household waste (MHW), in high concentration. It was also confirmed that workers are exposed to high RCS concentrations while transferring collected CBA into a container. Although each local government in South Korea handles CBA in different ways, it is imperative to investigate the CBA exposure level of sanitation workers and improve their working conditions.
#Coal briquettes ash #Dust #Exposure #Quartz #Worker

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참고문헌 (20)

참고문헌 신청
Bhaskar, R. / 1994 / A comparative study of particle size dependency of IR and XRD methods for quartz analysis / American Industrial Hygiene Association Journal 55(7):605~609 google schola Fleming, L. E. / 2002 / Solid waste workers : occupational ex-posures and health / The Journal of Solid Waste Technology and Management 28(2):79~96 google schola Government Announcement, joint government depart- ments / How to improve waste collection worker’s safety google schola IARC / 2012 / Diesel and gasoline engine exhausts and some nitrogenes google schola IARC / 1997 / Silica, some silicates, coal dust and para- aramid fibrils :1~475 google schola

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