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Characteristics of Airborne Asbestos Concentrations after Asbestos Abatement in Schools in Seoul
Kwang-Rae KIM,Jai-Young LEE,Ji-Young LEE,Soo-Nye CHUNG,Sun-Jeong WON,Ji-Sung KIM,Ki-Kyo LIM,Jeong-Eun BAE,Ma-Rhan YANG,Seung-Mi KWON,Jin-Ho SHIN,Jun-Yeon LEE,Yong-Seung SHIN 한국유통과학회 2023 International Forum on Business Convergence (IFBC) Vol.2023 No.-
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김창규(Chang-Kyu Kim),하광태(Kwang-Tae Ha),강미혜(Mi-Hyae Kang),정숙녀(Sook-Nye Chung),김지성(Ji-Sung Kim),김가연(Ga-Yeon Kim),정종흡(Jong-Heub Chung),어수미(Soo-Mi Eo),정권(Kweon-Jung) 대한환경공학회 2018 대한환경공학회지 Vol.40 No.7
본 연구의 목적은 석면 비산방지제의 성능을 평가하는 장치기술을 개발하여 현행 공정시험방법을 효율적으로 개선하고자 하였다. KS의 석면 비산방지제 시험방법(KS M 2757:2014)중 섬유비산 시험방법의 공기분사방식과 공기분사구의 압력조절방식을 개선하여 시험의 정확성을 증대시켰다. 공기분사방식을 1-way에서 2-way로 적용한 결과, 측정된 석면 평균농도는 0.051 f-PCM/㏄로서 기존의 1-way방식(0.012 f-PCM/㏄)보다 약 4배 높아 석면 검출능력이 향상되었다. 또한 공기분사구 압력조절방식 개선을 위해 표면압력측정부를 적용한 결과, 시험체 표면에 항상 일정한 풍속 약 10 ㎧를 유지하였다. 그러나 표면압력측정부가 없는 경우에는 구동모터의 이격거리 변화 때문에 풍속이 변화하여 각각 6.6, 4.8, 3.7 ㎧로 일정하지 못하였다. 그러므로 2-way공기분사방식을 통해 시험체에 충분한 유량을 사각지대 없이 공급하여 석면 검출능력을 높이고, 표면압력 측정기능을 통해 시험체에 일정한 풍속을 유지시킴으로써 시험방법의 정확성과 효율성을 개선하였다. The purpose of this study is to develop a device to evaluate the performance of asbestos stabilizers and improve the accuracy of the process test method. We increased the accuracy of the test method by applying the air injection method and pressure control method of the nozzle in the testing methods for performance evaluation of encapsulants in asbestos-containing building materials (KS M 2757:2014). As a result of applying the air injection method, the average concentration of asbestos obtained using the 2-way method was 0.051 f-PCM/㏄, which is approximately four times higher than that obtained using the 1-way method (0.012 f-PCM/㏄). In addition, as a result of applying the pressure control method, a constant air velocity of approximately 10 ㎧ was maintained at the air injection port to the specimen by using the surface pressure sensor. In the absence of the surface pressure measuring part, the air velocity was changed to 6.6, 4.8, and 3.7 ㎧ respectively, owing to the change of the travel distance of the turning motor. Therefore, the accuracy and efficiency of the test method were improved by supplying 2-way air injection to the specimen without blind spots and maintaining a constant air through the surface pressure sensing function.
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서울시내 석면함유 건축물 철거 현장 등에서의 효과적인 공기 중 석면농도 측정을 위한 연구
이진효 ( Jin Hyo Lee ),이수현 ( Su Hyun Lee ),김정연 ( Jeong Yeun Kim ),김지희 ( Ji Hui Kim ),정숙녀 ( Sook Nye Chung ),김진아 ( Ji Na Kim ),오석률 ( Seokr Yul Oh ),김익수 ( Ik Soo Kim ),신진호 ( Jin Ho Shin ),어수미 ( Soo Mi Eo ) 한국산업보건학회 2014 한국산업보건학회지 Vol.24 No.2
Objectives: This study is intended to seek credible and efficient measurements on airborne asbestos concentrations that allow immediate action by establishing complementary data through comparative analysis with existing PCM and KF-100 methodreal-time monitoring equipment in working areas in Seoul where asbestos-containing buildings are being demolished, including living environment surroundings. Materials: We measured airborne asbestos concentrations using PCM and KF-100 at research institutes, monitoring networks, subway stations and demolition sites of asbestos-containing buildings. Through this measurement data and KF-100 performance testing, we drew a conversion factor and applied it via KF-100. Finally we verified the relationship between PCM and KF-100 with statistical methods. Results: The airborne asbestos concentrations by PCM for the objects of study were less than the detection limit(7 fiber/mm2) in three (20%) out of 15 samples. The highest concentration was 0.009 f/cc. The airborne asbestos concentrations by PCM in laboratories, monitoring networks, subway stations and demolition sites of asbestos-containing buildings were respectively 0.002±0.000 f/cc, 0.004±0.001 f/cc, 0.009±0.001 f/cc, and 0.002±0.000 f/cc. As a result of KF-100 performance testson rooftops, the conversion factor was 0.1958. Applying the conversion factor to KF-100 for laboratories, the airborne asbestos concentrations ratio of the two ways was nearly 1:1.5(R2=0.8852). Also,the airborne asbestos concentration ratio of the two ways was nearly 1:1(R2=0.9071) for monitoring networks, subway stations, and demolition sites of asbestos-containing buildings. As a result of independent sample t-tests, there was no distinction between airborne asbestos concentrations monitored in the two ways. Conclusions: In working areas where asbestos-containing buildings are being demolished, including living environment surroundings, quickly and accurately monitoring airborne asbestos scattered in the air around the working area is highly important. For this, we believea mutual interface of existing PCM and a real-time monitoring equipment method is possible.
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서울시내 건축물 석면해체·제거 사업장 및 주변에서의공기 중 석면농도 특성에 관한 연구
이진효(Jin Hyo Lee),이수현(Su Hyun Lee),김정연(Jeong Yeun Kim),김지희(Ji Hui Kim),정숙녀(Sook Nye Chung),김진아(Jin A Kim),김익수(Ik Soo Kim),어수미(Soo Mi Eo),정권(Kweon Jung),이진숙(Jin Sook Lee),구자용(Ja Yong Koo) 大韓環境工學會 2014 대한환경공학회지 Vol.36 No.6
본 연구에서는 석면해체.제거작업에 따른 작업자 및 주변 환경에 미치는 영향 등을 파악하기 위해 서울시내 건축물석면해체.제거 사업장을 대상으로 공기 중 석면농도를 조사하고, 측정결과가 「석면안전관리법」에서 명시된 사업장 주변의석면배출허용기준에 적합한지를 살펴보았다. 서울시내 총 37개소 석면해체.제거 사업장에서 총 288개의 공기 중 시료를 분석하였으며, 전체 288개 시료 중 101개 시료에서(35%) 검출한계(7 fiber/mm2) 이하로 나타났다. 이 때 전체 공기 중 석면농도평균값은 0.003±0.002 f/cc로(최대 0.013 f/cc) 대부분의 공기 중 석면농도는 「석면안전관리법」에서 명시된 사업장 주변의 석면배출허용기준 0.01 f/cc 이하로 나타나 서울시내 건축물 석면해체.제거 사업장에서의 석면 노출가능성은 우려할 수준이아닌 것으로 판단된다. 채취지점별로 살펴보면, 부지경계선(148개), 위생설비입구(25개), 작업장주변(실내)(7개), 작업장주변(실외)(11개)에 대한 공기 중 석면농도 결과, 각각 53개(36%), 5개(20%), 1개(14%), 4개(36%) 시료에서 검출한계 이하로 나타났으며 평균농도는 각각 0.002±0.002 f/cc(최대 0.008 f/cc), 0.004±0.002 f/cc(최대 0.009 f/cc), 0.004±0.002 f/cc(최대 0.007 f/cc),0.004±0.002 f/cc로(최대 0.008 f/cc) 나타났다. 또한 음압기(13개), 폐기물보관지점(27개), 폐기물반출구(9개), 거주자주거지역(48개)에 대한 공기 중 석면농도 결과, 각각 3개(23%), 8개(30%), 2개(22%), 25개(52%) 시료에서 검출한계 이하로 나타났으며평균농도는 각각 0.004±0.002 f/cc(최대 0.009 f/cc), 0.005±0.004 f/cc(최대 0.013 f/cc), 0.005±0.003 f/cc(최대 0.009 f/cc),0.003±0.002 f/cc로(최대 0.009 f/cc) 나타났다. This study is purposed to measure airborne asbestos concentrations at demolition sites and surrounding areas of asbestoscontaining buildings in Seoul and examine whether the measurement results correspond with allowable exhaust standard for asbestosof the Asbestos Safety Control Act. The airborne asbestos concentrations for 37 sites were below the detection limit (7 fiber/mm2)in 101 (35%) out of 288 samples. The whole average airborne asbestos concentration in 37 sites was 0.003±0.002 f/cc (max 0.0013f/cc) and almost the whole airborne asbestos concentrations were satisfied with allowable exhaust standard for asbestos, 0.01 f/cc, ofthe Asbestos Safety Control Act. So possibility of asbestos exposure is not yet a major concern at current levels for sites demolishedof asbestos containing buildings in Seoul. Looking at each sampling point, the average airborne asbestos concentrations in boundaryline of site, entrance of sanitation, around the workplace (in), around the workplace (out), negative pressure units, storage area forwaste, outlet for waste and residential area of residents were respectively 0.002±0.002 f/cc, 0.004±0.002 f/cc, 0.004±0.002 f/cc,0.004±0.002 f/cc, 0.004±0.002 f/cc, 0.005±0.004 f/cc, 0.005±0.003 f/cc and 0.003±0.002 f/cc. As a result, all sampling points ofstudy were satisfied with allowable exhaust standard for asbestos, 0.01 f/cc, of the Asbestos Safety Control Act.
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