大陸沙塵暴及東亞生質燃燒期間台灣大氣中持久性污染物之傳輸特性研究; Long Range Transport of Dioxin-Like Pollutants via Asian Dust Storm and Biomass Burning

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Title:	大陸沙塵暴及東亞生質燃燒期間台灣大氣中持久性污染物之傳輸特性研究;Long Range Transport of Dioxin-Like Pollutants via Asian Dust Storm and Biomass Burning
Authors:	張木彬
Contributors:	環境工程研究所
Keywords:	戴奧辛;多氯聯苯;長程傳輸;大氣監測;PCDD/F;PCB;long range transport;ambient air sampling;大氣科學類
Date:	2007-12-01
Issue Date:	2010-12-28 14:36:54 (UTC+8)
Publisher:	行政院國家科學委員會
Abstract:	沙塵暴（dust storm）是強風捲起大量沙塵，使能見度迅速惡化的大氣現象是乾旱與環境沙漠化的產物，生質燃燒(biomass burning)則泛指包含森林木材、收成的農業殘餘物以及為取暖所使用的木炭等之燃燒行為。生質燃燒排放的氣態污染物包括CO、SOx、NOx 以及揮發性有機物等。值得關切的是，經由長程輸送機制進入台灣空氣品質管制區的懸浮微粒，一般多經過不同氣源區（包括污染區），因此近年來長程傳輸所帶來之懸浮微粒中各污染物之組成特性也引起國內外學者的關注，其中持久性有機污染物（Persistent Organic Pollutants, POPs）即為最可能經由長程傳輸進入台灣境內的污染物之一。本研究團隊於2006 年3 月13 日至3 月20 日大陸沙塵暴襲台期間曾針對北台灣大氣中戴奧辛進行濃度監測，初步研究結果顯示大陸沙塵暴來臨前北台灣大氣中之戴奧辛濃度約 0.030 pg-ITEQ/m3，大陸沙塵暴襲台時(2006 年3 月19 日)，大氣戴奧辛濃度飆升20 倍，達0.689 pg-TEQ/m3，超過日本環境省之管制標準(0.6 pg-TEQ/m3)，雖然附著於大氣微粒中的戴奧辛物種多半屬於毒性較低的物種，但是這些物種的半衰期較長，更有機會經由大氣擴散而產生長程傳輸，並經由乾、濕沈降作用而降落於表土，並透過食物鏈的傳輸，進而影響人類或其他動物的健康。因此本計畫將深入調查台灣地區沙塵暴及東亞生質燃燒期間大氣戴奧辛濃度變化並釐清經由境外長程傳輸攜入台灣空品區之持久性有機污染物(包括戴奧辛群、夫喃群、六氯苯及多氯聯苯群等)於大氣環境中之傳輸機制及氣固相分佈特性，進一步彙整相關採樣數據及監測資料以建立大氣戴奧辛類污染物長程傳輸推估模式，提供環保署施政之參考，並協助國內衛生單位降低戴奧辛污染物於特殊污染事件日對全民健康所造成之危害。 In spring, A s i a n dus t s t orms (ADS) originating in the deserts of Mongolia and China make their way to populated area of East Asia, including Taiwan. In addition, biomass burning has drawn global concerns in the past decades for its effects on visibility, human health and global climate by emitting particulate matter and other gaseous pollutants such as CO、SOx、NOx and VOCs. The ADS and biomass burning lead to enhanced PM10 and PM2.5 levels beyond those due to local sources. Those particles usually contain diversified organic matter and nutrients that may cause adverse effects on human health and substantial economic damage. Relevant epidemiological study reveals that suspended particles considerably influence respiratory health. Particularly, the contents of persistent organic pollutants (POPs) existing in suspended particles via long range transport have been investigated. Our previous study indicates that the PCDD/F concentration (739 fg-TEQWHO/m3) measured in ambient air in Taipei city during ADS event on 19 March 2006 is even higher than the ambient air quality standards proposed in Japan (600 fg-TEQWHO/m3). Additionally, the solid-phase PCDD/Fs and PCBs are brought into the atmosphere through wind blowing, and eventually settle to water bodies or other receptors in the environment via either dry or wet deposition mechanism. Some of those PCDD/Fs and PCBs may eventually enter human bodies via food chain. In this study, the concentrations of particulate matter and POPs including seventeen 2, 3, 7, 8-substituted PCDD/F and twelve toxic PCB congeners will be monitored during ADS and biomass burning events. The objective of this study is to evaluate the effects of ambient POP concentrations caused by ADS and biomass burning via long range transport. 研究期間：9603 ~ 9612
Relation:	財團法人國家實驗研究院科技政策研究與資訊中心
Appears in Collections:	[Graduate Institute of Environmental Engineering ] Research Project

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