|中文摘要||本計畫執行目的：(1)建立完善地下水及其他環境水體中，持久性有機污染物的採樣與分析技術，及其相關背景資料，以提供環保單位未來在採樣方法修訂或管制標準研訂時之參考依據；(2)比對採樣方法W790.50B二重覆分析結果及同時比對離心與非離心採樣方式差異；(3)評估離心機使用時機並納入採樣方法修正草案中。 本計畫完成7家工廠放流水及1口監測井等高污染潛勢區域調查，分析結果顯示，放流水中戴奧辛濃度為0.017~21.3 pg WHO-TEQ/L，以WI-03醫療廢棄物焚化爐為最高；多氯聯苯濃度為ND~0.308 pg WHO-TEQ/L；PBDEs濃度為298~9315 pg/L，皆以WI-04為最高。本計畫同時調查曾經運作十溴二苯醚工廠(BDE-02)內地下水中持久性有機污染物濃度，發現其污染物濃度偏高，二次調查結果中戴奧辛含量分別為0.090及0.115 pg WHO-TEQ/L，而多溴二苯醚含量則高達10.2及167 ng/L，顯示該地區仍有溴化阻燃劑之殘留。 在採樣方法二重覆分析結果方面，二台設備同時採樣後所測得的戴奧辛及多氯聯苯濃度並無顯著差異，另外在採樣時亦同時架設另一組離心式採樣，以評估納入離心機後對樣品濃度之影響，結果顯示不同採樣方式下戴奧辛及多氯聯苯濃度皆在10%的相對偏差範圍內。計畫另一個重點工作項目乃評估離心機使用時機，並將評估結果納入採樣方法修正草案中，根據實驗室測試與真實樣品分析結果，採樣時離心機的使用時機，針對地表水或調勻池廢水，建議採樣人員可由三方面評估是否需使用離心機：(1)樣品採樣量多寡；(2)水中懸浮微粒濃度範圍；(3)每張濾紙所能過濾的水樣量，使用離心機後不但可以省下1/2的濾紙量，還能省下1/3的採樣時間，為解決現行分析或採樣方法耗時的問題，本計畫完成的成果能提供相未來在採樣及分析方法修訂或管制標準研訂時之參考。|
Investigation of Persistent Organic Pollutants in Groundwater for Contaminated Sites.
|英文摘要||The purpose of the program is: (1) to establish and improve groundwater and other environmental water, sampling and analysis of persistent organic pollutants, and related background data to provide environmental agencies in the future when amending or standards developed in the sampling method reference; (2) to compare the results of two-fold analysis of the sampling method NIEA W790.50B and compare the differences between centrifugal and non-centrifugal sampling methods; (3) to evaluate the timing of the use of the centrifuge and to incorporate it into the draft revision of the sampling method. The program has completed investigations on such high pollution potential areas as 7 plants producing effluent and 1 monitoring well. The analysis showed that PCDD/Fs concentration in the effluent was 0.017 ~ 21.3 pg WHO-TEQ/L, and the WI-03 medical waste incinerator was the highest; the concentration of DL-PCBs was ND ~ 0.308 pg WHO-TEQ/L; the PBDEs concentration was 298 ~ 9315 pg/L, both of which were the highest for WI-04. The program has also investigated the concentration of persistent organic pollutants (POPs) in groundwater of the decabromodiphenyl ether plant (BDE-02) and found that the concentration of pollutants was high, among which the dioxin content was 0.090 and 0.115 pg WHO-TEQ/L while the content of polybrominated diphenyl ethers was as high as 10.2 and 167 ng/L, indicating the presence of residual brominated flame retardants in the area. As for the results of two-fold analysis of the sampling method, there were no significant differences in the concentrations of PCDD/Fs and DL-PCBs measured after simultaneous sampling of the two devices, and another set of centrifugal samples was also taken at the time of sampling to evaluate the effects of the inclusion of the centrifuge on the sample concentration. The results showed that the concentrations of PCDD/Fs and DL-PCBs in different sampling methods could be kept within the relative deviation of 10%. Another important work item of the program is to evaluate the timing of the use of the centrifuge and incorporate the results into a draft revision of the sampling methodology. According to laboratory test results, the proposed sampling staff can be assessed by three aspects of the need for the use of centrifuges for surface water or raw wastewater:1.sample sampling volume, 2.concentration of suspended particles in water,3.the amount of water that can be filtered per filter, consideration could be given to incorporating centrifuge equipment to reduce the load on subsequent sampling, so you can shorten the sampling time of 1/3 and save half of the filter paper usage. Through establishment of sampling and analytical techniques for dioxin and polybrominated diphenyl ethers in water under the program, and completion of the investigation on persistent organic pollutants in water, and the establishment of the background database, the reference for environmental protection units in the future revision of sampling methods or regulatory standards development is provided.|