調查石化廠附近之養殖魚體與底泥中類戴奧辛化合物

Investigation of Dioxin-like Compounds for Aquatic Fish and Sediments Around the Petroleum Plants

吳岳峰(Yueh-Feng Wu)

指導教授 ： 林傑

國立屏東科技大學/工學院/環境工程與科學系所/碩士(2013年)

https://doi.org/10.6346/NPUST.2013.00143

摘要

類戴奧辛化合物在環境中是普遍存在具有毒性的污染物質，且為非刻意釋放至環境中的副產物，並經由熱處理，如：焚化、化工製程及有機氯化合物製程，皆可能形成多氯二聯苯戴奧辛和多氯二聯苯呋喃(PCDD/Fs)。本研究針對石化工業園區附近採樣地點進行魚體及底泥中PCDD/Fs和多氯聯苯(PCBs)之濃度測定。文獻指出在厭氧底泥中可降解PCDD/Fs，意味著隨著時間的推移，可以預測同源物成分的改變。本研究結果顯示，在所有採樣點中17種PCDD/Fs同源物之總濃度的趨勢變化是相似的，魚及底泥樣本的同源物分佈亦有一致性，濃度貢獻以OCDD為主；樣本中之潛在毒性可利用2,3,7,8,-TCDD為基準，計算樣品中之毒性當量。計算結果顯示，魚體及底泥毒性貢獻以2,3,4,7,8-PeCDF、2,3,7,8-TCDD和 1,2,3,7,8-PeCDD為主要物種。藉由本研究結果顯示，底泥樣本比魚體樣本含有較高毒性當量，若將多氯聯苯毒性包括於毒性當量，計算結果顯示，於魚受體內之多氯聯苯毒性貢獻可高達60%。其中以PCB#126和PCB#169同源物為主要貢獻物種。石化廠周圍之魚體及底泥已可能受到類戴奧辛化合物污染。

關鍵字

類戴奧辛化合物 ； 戴奧辛 ； 多氯聯苯 ； 魚體 ； 底泥

並列摘要

Dioxin-like compounds are toxic, ubiquitous contaminants that are unintentionally released into environments as byproducts. Polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) are formed via thermal processes such as incineration and chemical production processes such as the production of chlorinated organic compounds. This study describes measurements of PCDD/Fs and polychlorinated biphenyl (PCBs) in the fish and sediment at several sites located around the petroleum industrial park. It has been suggested that PCDD/Fs can degrade in anoxic sediments. This means that congener composition can be expected to change over time. The results indicate the total concentration of the 17 toxic PCDD/Fs congeners showed a similar trend at all sites. In the ponds samples the homologue distribution was more uniform and OCDD dominated the PCDD/Fs. The relative toxic potential for the studied samples was estimated by calculating toxic equivalents relative to 2,3,7,8-TCDD (TEQs). 2,3,4,7,8-PeCDF, 2,3,7,8-TCDD and 1,2,3,7,8-PeCDD dominated for TEQs contribution in fish and sediment samples. Based on this study, sediments samples contained higher toxic equivalents (TEQs) than fish body. Including PCBs TEQs, our results show that PCBs could contribute more 60% of TEQs for fish receptor. PCB#126and PCB#169 dominated for TEQs contribution. This concludes that the occurrence and distribution of Dioxin-like contaminants in fish and sediment collected in the polluted area around a petroleum plant.

並列關鍵字

Dioxin-like compounds ； Dioxins ； PCBs ； fish body ； sediments

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