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리그노셀룰로오스 섬유 기반 활성탄-첨가 섬유판 필터의 미세먼지 저감장치용 적용가능성 평가
양인 ( In Yang ),소재민 ( Jae Min So ),황정우 ( Jeong Woo Hwang ),최준원 ( Joon Weon Choi ),이영규 ( Young-kyu Lee ),최원실 ( Wonsil Choi ),오승원 ( Seung Won Oh ),문명철 ( Myoung Cheol Moon ) 한국화학공학회 2021 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.59 No.4
본 연구는 부직포의 환경오염 문제를 해결하기 위하여 리그노셀룰로오스 섬유와 야자각 활성탄(CSA)을 이용한 미세먼지-저감 여과필터의 제조 가능성을 조사하였다. CSA의 경우, 휘발성 유기화합물(VOC)과 유해금속의 저감을 위한 여과필터 제조용 원료로서 적용 가능성을 확인하였으며, CSA의 VOC 저감효과는 목섬유보다 5배 이상으로 측정되었다. 돈모, 인모, 돈혈과 같은 단백질계 원료와 낙엽송 수피 열수 추출물을 이용하여 조제한 천연접착제를 적용하여 최소 200 kg/㎥의 목표밀도와 함께 최대 40 wt%의 CSA로 제조된 섬유판은 취급이 가능한 강도를 보유한 것으로 나타났다. 그러나 이 조건에서 제조된 섬유판의 경우, 통기성이 낮아 이를 해결하기 위하여 통기구를 가진 섬유판의 제조가 요구되었다. 활성탄으로 사용한 CSA는 강도 및 성형성을 고려하여 입자의 크기는 2 mesh 이상으로 조절이 필요하였고, 표층에는 목섬유만 심층에는 목섬유와 활성탄으로 구성된 3층 섬유판으로 제조하는 방안이 최적조건으로 도출되었다. 한편 필터지(한지)는 우수한 미세먼지 여과능을 가진 것으로 조사되었으며, 결과적으로 타공 섬유판과 함께 한지로 구성된 여과필터 세트가 부직포로 생산되고 있는 기존 여과필터를 대신하여 실내외 공간에 존재하는 미세먼지 외에 VOC와 유해금속 등의 저감장치용 여과필터로서 사용이 가능한 것으로 나타났다. This study was conducted to investigate the applicability of lignocellulosic fiber and coconut shell activated carbon (CSA) for the production of a particulate matter (PM)-reducing air-filter as raw materials to solve the environmental problems of non-woven fabrics. CSA had a good potential to use as a raw material of air-filter for reducing volatile organic compounds as well as noxious metals, and reduction capability of the CSA was 5 times higher than that of wood fiber. Natural adhesives formulated with proteinaceous wastes mostly were applied successfully to fabricate air-filters with the shape of fiberboard. The air-filter fabricated with the minimum target density of 200 kg/㎥ and the maximum CSA-content of 40 wt% in fiberboard had a good manageable strength. However, the fiberboard filters was required to make vent-holes for improving an air-permeability of the filters. Size of the CSA particles was adjusted to greater than 2 mesh with the consideration of strength and formability of the fiberboard. Three-layers fiberboard that only wood fiber and the mixture of wood fiber and CSA were formed in the surface and middle layers, respectively, was determined to the optimal condition for the production of air-filters. In addition, traditional Korean paper handmade from mulberry trees (TKP) showed a good PM-reducing property as an air-filter. It is concluded that air-filtering set composed of fiberboard with vent-holes and TKP instead of conventional air-filters made with nonwoven fabrics can be used as a filter for reducing the concentrations of PM, VOC and noxious metals existed in indoor and outdoor spaces.
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Ammonium nitrate의 유해성과 작업환경 관리
김현영 ( Hyeon Yeong Kim ),황양인 ( Yang In Hwang ),국원근 ( Won Kwen Kuk ) 한국산업위생학회 2012 한국산업보건학회지 Vol.22 No.3
Objectives: The purpose of this study is the work environment management method through risk assessment and investigation of the work place that deals with Ammonium nitrate, based on information in and outside the country. Methods: This study suggests method of work environment management through risk assessment and investigation of the work place that deals with Ammonium nitrate, and finds out cases of Ammonium nitrate causing hazard, danger and health risk, based on literature investigation. Results: Rats exposed repeatedly to LD50 2,217 mg/kg(rat), LC50 88.8 mg/L(rat, skin) which cause high level of skin irritation, reported 1 mg/m3 of NOAEL, while LOAEL was less than 100 mg/kg for the rats orally administered with the LD50 2,217 mg/kg(rat), LC50 88.8 mg/L(rat, skin), for 13 weeks, Domestically 31,640 ton/y of ammonium nitrate has been used in 22 workplace and the result of workplace assessment was 0.0171-0.9983 mg/m3, ADD was 8.77-59.63ug/kg-day according to the exposure scenario. In other words the result of the risk assessment goes beyond the ``standard 1``. Conclusions: Ammonium nitrate creates a high level of irritation and toxicity when coming in breathe it or contact with skin, and is classified as category3 of GHS and specific target organ toxicant (irritating respiratory system), Exposure level at work places needs to be maintained under 1 mg/m3, to prevent workers from being damaged.
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김현영 ( Hyeon Yeong Kim ),황양인 ( Yang In Hwang ),국원근 ( Won Kwen Kuk ) 한국산업위생학회 2012 한국산업보건학회지 Vol.22 No.2
Objectives: Epichlorohydrin is a material that has been predicted to have high volatility and strong toxicity and is used normally in working area. Therefore, the hazardous and dangerous level and the foreign management system about epichlorohydrin should be invested at home and abroad and through hazard assessment for occupational environment measurement and exposure status of industrial workers in domestic working area. Methods: To assess risk and to suggest Development and Adoption to prevent health damage of workers owing to the epichlorohydrin exposure, the hazardousness and dangerousness of epichlorohydrin and its practical examples and regulation level for domestic and abroad health impairment are researched on the base of various references. Results: The epichlorohydrin caused skin and mucus membrane irritation, respiratory paralysis, kidney and live damage under the influence of acute toxicity and in animal study, it was confirmed as a doubtful carcinogenic substance to trigger reducement of sperm number and reproduction ability, abnormal spermatogenesis, mutagen, increase of forestomach epithelium and occurrence of papilloma and so on, as well as it induced stimulus asthma and allergic contact dermatitis for exposure workers. Conclusions: Epichlorohydrin was found to occur allergic contact dermatitis, carcinogenesis doubt and reproduction toxicity and was verified as a material which would be established reinforcement of management level to care health of handlers, such as denotement dangerousness of skin absorption.
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백화점/대형할인매장 종사자의 근골격계질환 특성 분석 연구 : 설문조사 위주
김진영(Jin Young Kim),홍정숙(Joung Suk Hong),양헌욱(Hun Wook Yang),황양인(Yang In Hwang),신용남(Yong Nam Shin),임흥재(Heung Jae Im),고광석(Kwang-Seog Koh) 대한인간공학회 2010 대한인간공학회 학술대회논문집 Vol.2010 No.5
본 연구는 2009 년 산업재해 기준 제조업을 제외한 비제조업종 중 근골격계질환 최대 다발업종인 도 · 소매 및 유사서비스업종 (일명: 유통업) 종사자에 대한 근골격계질환 발생특성을 파악하기 위함이다. 그리고 그에 대한 대책을 수립하기 위해 현장조사, 설문조사, 주요작업별 인간공학적 노출평가 등을 실시해 그 결과를 동종업종에 전파함으로써 재해감소에 기여하고자 함이며, 본 연구는 기존에 발표된 현장조사결과 및 인간공학적 노출평가를 제외하고 유통업종 중 대표적 분야인 백화점 및 대형할인매장 종사자에 대해 설문조사를 통해 주요 작업별, 발생원인별, 심리사회적 요인별 등 실태파악을 하여 사업주의 의학적조치 등 개선안 제시 및 향후 동종 업종 종사자들의 근골격계질환 예방에 기초자료로 활용되길 기대한다.
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