碩士 / 中國醫藥大學 / 職業安全與衛生學系碩士班 / 102 / This study was to assess the extent and characteristics of metal fumes exposed to shipbuilding industry welding workers. One shipbuilding industry was selected and samplings were conducted in the three areas of large (half-enclosure workplace), medium (half-open to the air), and small (open to the air) segment combination areas . The IOM personal sampler was used for collecting inhalable aerosols , and the Marple 8-stage personal cascade impactor was used for particle size segregating samplings. Results show that concentrations found the concentrations in the large segment were higher than that of the medium and small segment combination areas. All exposures were consistently found to be bimodal in all investigated areas. The mass concentration and particle size of the fine mode for the large segment was significantly higher than that of the other two combination arras. The above results suggest generated welding fumes could be much easier accumulated in the enclosure area than under the other two conditions. After the analysis of metal components, iron and manganese were found to be the highest (~ 10% and 5%, respectively) and were dominated in the fine mode. The above results were consistent with the welding fume generation mechanism. We also found that ~ 50% mass concentration of inhalable aerosol can be inhaled down to the alveolar region. These tiny particles might cause lung irritation and the increase in the risk of disease associated with heavy metal exposures.
| Identifer | oai:union.ndltd.org:TW/102CMCH5590016 |
| Date | January 2014 |
| Creators | Yuan-Ruei Liou, 劉員睿 |
| Contributors | Chen-Peng Chen, 陳振菶 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 49 |
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