本研究為探討拆爐維修期間各維修作業勞工PAHs暴露特徵、健康危害風險、勞工PAHs暴露與生物暴露指標之相關性、作業場所的粒徑分布及拆爐作業勞工各種不同PAHs暴露源（飛灰、底灰及爐壁上的灰）之PAHs組成特徵。
本研究同時針對作業場所氣膠分布採樣、粒徑分布採樣、勞工個人PAHs採樣及皮膚貼試採樣加以評估；其中勞工個人採樣部分，係依工作階段及性質將其分成清潔爐體、搭架作業、噴砂作業、清爐床（噴砂後）、爐床整修、濾袋清潔檢查及監工等七個相似暴露族群，進行個人採樣。並採集作業場所的底灰、壁灰及飛灰等暴露來源物質，瞭解其PAHs的組成含量特徵。另外並配合勞工生物偵測，藉以探討勞工環境暴露值與生物偵測之相關性。
結果顯示焚化爐拆爐作業勞工所暴露到的Total-PAHs平均濃度分別為，清爐床(噴砂前)：24026 ng/m3、搭架：18126 ng/m3、噴砂：18493 ng/m3、清爐床(噴砂後)：17717 ng/m3、爐床整修：12613 ng/m3、濾袋清潔檢查：12843 ng/m3、監工：10772 ng/m3。高暴露族群為清潔爐體、搭架作業、噴砂作業等前置清爐工作階段。而勞工個人PAHs暴露濃度隨著工作階段進行而減少，且勞工所暴露之PAHs以氣相為主要的暴露源，並以二、三環之低分子量PAHs為主。而其致肺癌與皮膚癌之風險分別介於3.14 ×10-4 － 2.60 ×10-3及7.41×10-6－1.85×10-4之間，因此針對拆爐作業勞工之保護宜有呼吸暴露防範為優先進行。以各沉積部位來看，以肺泡區的PAHs濃度為最主要，因此在選用呼吸防護具時，因考慮可去除此粒徑之粉塵。在環境偵測與生物偵測方面，經由多變相線性回歸發現勞工的抽菸習慣與年資均沒有顯著的意義，但結合個人呼吸道及皮膚之PAHs暴露量，可解釋42.9%因暴露一天致尿中產生1-hydroxypyrene濃度的變異量。
拆爐作業勞工之呼吸暴露保護除需考量粉塵危害外，氣狀PAHs危害並不容忽視，因此在選用呼吸性防護時，需以組合方式結合防毒面具與防塵口罩為宜。而為減少勞工氣狀PAHs暴露，建議於停爐後，經充分的通風後才讓勞工進爐作業。

The aim of the study is to investigate the characteristics, health risk, the relationship between personal exposures and biological monitoring results for municipal waste incinerator demolition workers associated with polycyclic aromatic hydrocarbons (PAHs) exposures, and the composeition characteristics of various emission sources to personal exposures.
We conducted size-segregating, and personal respiratory and dermal sampling on all selected workers whom were further divided into 7 categories of the stove cleaning, scaffold construction, sand blasting, stove cleaning, stove maintenance, bag-filer inspection, and supervising. In addition, biological monitoring was also conducted to investigate the relationship between personal exposure levels and biological monitoring results.
Results show that total-PAHs exposure levels for the seven SEGs were. 24026, 18126, 18493, 17717, 12613, 12843, and 10772 ng/m3, respectively. The high exposure groups were those associated with early-stage demolition works, which included the stove cleaning, scaffold construction, and sand blasting. The later work stage the lower PAH exposures were found in the involved workers. All personal exposures were mainly contributed by gaseous PAHs, which were dominated by the low molecular weight PAHs containing two to three aromatic rings. The estimated lung cancer and skin cancer risks for all demolition works fell to the range 3.14 ×10-4 － 2.60 ×10-3, and 7.41×10-6－1.85×10-4, respectively, indicating the preventing strategy should be focused on inhalatory exposures, rather than on the dermal exposures. By conducting multivariate linear regression analyses, this study found that worker’s smoking habit and age were not significant, but through the combination of both personal respiratory and dermal exposures would be able to explain the 42.9% variations of workers’ urinary 1-hydroxylpyrene (1-OHP).
Workers involved in the demolition of incinerator were affected both by dust and gaseous PAH exposures. The selected personal respiratory protective equipment would provide functions to eliminate both dust and gaseous exposures. In order to reduce gaseous PAH exposures, the incinerator should be fully ventilated before the demolition work can be conducted.

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