| Summary: | 碩士 === 國立中山大學 === 環境工程研究所 === 107 === Coal stockpile is typical in industries, as the emission of particulate matter from this particular source is of increasing concern. The International Cancer Research Center has listed PM2.5 as a human primary carcinogen, considered that PM2.5 is often accompanied by harmful substances such as heavy metals and polycyclic aromatic hydrocarbons (PAHs). In this study, coking coal was employed in lab experiments for investigating the associated fugitive PM emission. The PM2.5 concentrations were analyzed by Dichotomous Sampler, followed by the analyses of the concentrations of PAHs and selected heavy metals on the surfaces of PM. The objective of this study was to assess the health effect potential of various groups including different ages, sexes, and exposure pathways. The details of the purposes contain: 1. To understand the fugitive PM2.5 concentration from this source and the associated PAHs and heavy metal concentration; 2. To explore the exposure and cancer effect potential of males and females with different ages; 3. To explore the non-cancer effect potential of males and femals with different ages; 4. To study the species distriubtions of PAHs and heavy metals on the fugitive PM2.5 and critical influencing factors of the health effect potential; and 5. To compare the results with those from another type of coal stockpile.
The results showed that As has relatively higher concentrations than those of PAHs and other heavy metals on fugitive PM2.5 from coke stockpiling. Both cancer and non-cancer effect potentials were elevated for males than for females. The childs possessed higher health effect potentials in different scenarios. Inhalation is a more important exposure pathway than digestion. The Inhalation cancer effect potential was mainly contributed by Cr(VI) and the digestion cancer effect potential was mainly contributed by As, whereas As affected the results of the non-cancer effect potential. In comparison of the reuslts between coking and fuel coals, it was found that the trends of the health effect potentials of two types of coals were similar. The cancer effect potentials by inhalation was higher for inhalaintg the fugitive PM2.5 by coking coal stockpiling; however, the threats were elevated when digestion was considered as the main exposure pathway. Overall, the potentials for negative human health effects caused by the PM2.5 by coke coal stockpiling were lower than those of fule coal.
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