| 研究生: |
李佳樺 Chia-Hua Li |
|---|---|
| 論文名稱: |
東亞大氣汞之長程輸送研究: |
| 指導教授: |
林能暉
Neng-Huei Lin |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學學系 Department of Chemistry |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 99 |
| 中文關鍵詞: | 長程輸送 、總汞 、冷蒸氣原子螢光光譜儀 |
| 相關次數: | 點閱:8 下載:0 |
| 分享至: |
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摘要
過去研究中,藉由量測PAHs,硫化物等,作為長程輸送污染物之指標。但在大氣汞的探討較缺乏,尤其在東亞地區(以中國為最大排放源)則付之闕如。本論文旨在研究當東北季風盛行時,定量分析台灣北部竹子山區層狀雲內總汞含量,以探討汞作為長程輸送指標污染物之可能性。
以風標式雲霧水採樣器進行採樣,採樣時間為2004年1月27日至2004年2月5日,共採得2個雲事件,31個雲霧水樣本,利用冷蒸氣原子螢光光譜儀分析雲霧水中總汞含量,分析結果平均濃度為30.0 ng L-1 (3.6 - 405.9 ng L-1),此兩次雲事件之雲中總汞總負載量為556.2 pg m-3 (1.6-141.0 pg m-3)。
吾人為了進一步探討汞污染與長程輸送之關係,配合氣流軌跡模式來判斷汞污染物之可能來源區域,結果顯示來源之上風處主要經過中國華北(北京、山西)與華南(貴州、廣東)一帶,以伴隨之天氣型態來看,東北季風盛行時所挾帶的總汞量較多(18.8 pg m-3) ,鋒面型態較少(16.6 pg m-3)。
吾人假設以汞與二氧化硫的比例來推算和不同氣流之上游來源之關係,當氣流上游來源來自台灣及鄰近區域時, Hg/SO2的比值約2.65 x 10-3,且數值分布呈現一致性。反之,來自中國華南沿海之比值則為10.11 x 10-3,而來自中國華北地區平均比值為8.01 x 10-3;氣流上游若來自中國華南內陸地區(如貴州、廣東一帶)時, Hg/SO2為1.44 x 10-3。此結果似乎說明Hg/SO2與源區污染現狀有一定之關聯性,未來可進一步確認。
林能暉 (2003) 桃園縣酸雨分布及強度研究-境外污染貢獻分析及敏感區密集觀測,桃園縣政府環境保護局九十二年度施政配合計畫。
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