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Comparison between time integrated sampling and direct reading sampling of nanoparticulate at the workplace : 작업장의 나노입자상 물질에 대한 시간누적 시료채취와 실시간 시료채취 방법 비교
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | 윤충식 | - |
dc.contributor.author | 김선주 | - |
dc.date.accessioned | 2017-07-19T03:10:04Z | - |
dc.date.available | 2017-07-19T03:10:04Z | - |
dc.date.issued | 2015-02 | - |
dc.identifier.other | 000000025677 | - |
dc.identifier.uri | https://hdl.handle.net/10371/128226 | - |
dc.description | 학위논문 (석사)-- 서울대학교 보건대학원 : 환경보건학과, 2015. 2. 윤충식. | - |
dc.description.abstract | Objective: Nanoparticles are generated by engineered and unintended in a variety of workplaces and process. Nanoparticles generation in unintended nanoparticle emitting workplace may originate from hot process, welding process. Number and surface area concentration of nanoparticles is generally assessed by a variety of direct reading instruments unlike traditional method. The purposes of this study were to compare time integrated sampling and direct reading instrument sampling method at nanoparticles generation workplaces, and to compare statistically full time sampling and time interval sampling categorized by time integrated sampling method. As characteristics of a variety of workplaces measured in this study were investigated, this study suggests appropriate sampling method by workplace.
Methods: Sampling was used two methods | - |
dc.description.abstract | the way to use a filter which sampled the air of workplace as time integrated sapling method and the way to sample by direct reading instrument such as SMPS, DustTrak, AeroTrak. Each filter was measured the direct reading instrument simultaneously, and for full time sampling compared with time interval, time interval sampling is measured for working time while replacing a filter by predetermined time interval. Analysis is performed for mass, metals, and TEM. Statistical analysis is performed to compare associations between metrics.
Results: Concentrations measured at unintended nanoparticle emitting workplaces were higher than those at engineered nanoparticle manufacturing workplaces. CV of concentration is larger as shorter time interval. Full time samples were significantly higher coefficient than time interval samples in spearmans rank test. Conclusions: As PM2.5 concentration out of total mass concentration measured at welding workplaces was above 90%, mass concentration is recommended by gravimetric method. Although concentration measured at engineered nanoparticle manufacturing workplaces was relatively low, nanoparticles generation ratio is high. Therefore, the best way of sampling methods are recommended by using together direct reading instrument and gravimetric sampling method. | - |
dc.description.tableofcontents | Contents
Abstract i Contents iii List of Tables iv List of Figures v 1 Introduction 1 2 Methods and materials 4 2.1 Definition of expression 4 2.2 Study design 5 2.3 Sampling methods 11 2.3.1 Time integrated sampling 11 2.3.2 Direct reading sampling method 13 2.4 Analysis methods 15 2.5 Statistical analysis 16 3 Results 17 3.1 Characteristics of workplaces 17 3.2 Comparison of time integrated sampling and direct reading sampling method 24 3.3 Comparison of full time and time interval sampling methods Comparison of the full shift and time-interval sampling methods 28 4 Discussions 33 5 Conclusions 38 6 References 39 국문초록 42 | - |
dc.format | application/pdf | - |
dc.format.extent | 1536624 bytes | - |
dc.format.medium | application/pdf | - |
dc.language.iso | en | - |
dc.publisher | 서울대학교 대학원 | - |
dc.subject | Engineered nanoparticles | - |
dc.subject | Unintended nanoparticles | - |
dc.subject | Direct reading instrument | - |
dc.subject | Time Integrated Sampling | - |
dc.subject | Sampling method | - |
dc.subject.ddc | 363 | - |
dc.title | Comparison between time integrated sampling and direct reading sampling of nanoparticulate at the workplace | - |
dc.title.alternative | 작업장의 나노입자상 물질에 대한 시간누적 시료채취와 실시간 시료채취 방법 비교 | - |
dc.type | Thesis | - |
dc.contributor.AlternativeAuthor | Sunju Kim | - |
dc.description.degree | Master | - |
dc.citation.pages | ⅴ, 43 | - |
dc.contributor.affiliation | 보건대학원 환경보건학과 | - |
dc.date.awarded | 2015-02 | - |
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