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系統識別號 U0026-0812200914345577
論文名稱(中文) 利用水溶性離子鉛同位素變化探討彭佳嶼大氣懸浮微粒中鉛的來源
論文名稱(英文) Tracing Sources Variation of Lead in Aerosols Collected From the Peng Chia Yu:Chemical Compositions and Pb isotopes
校院名稱 成功大學
系所名稱(中) 地球科學系碩博士班
系所名稱(英) Department of Earth Sciences
學年度 96
學期 2
出版年 97
研究生(中文) 連明瑜
研究生(英文) Ming-yu Lien
學號 l4694113
學位類別 碩士
語文別 中文
論文頁數 56頁
口試委員 指導教授-游鎮烽
口試委員-饒瑞鈞
口試委員-何恭算
中文關鍵字 逆軌跡分析  主成分分析法  鉛同位素  水溶性離子  懸浮微粒 
英文關鍵字 backward trajectory analysis  aerosol  Pb isotope  principal components analysis 
學科別分類
中文摘要 本研究分析1997年4月至2000年3月在彭佳嶼採集的大氣懸浮微粒樣本之水溶性金屬離子觀察懸浮微粒表面吸附污染物質,試圖解釋懸浮微粒從產生經由不同傳輸路徑中所吸附的鉛。利用感應耦合電漿質譜儀(ICP-MS)及多接收器感應耦合電漿質譜儀(MC-ICP-MS)量測大氣懸浮微粒水溶性金屬離子Na、Mg、Al、K、Ca、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Rb、Sr、Cd、Ba、Pb 等19 個元素濃度與鉛同位素比值。
配合主成分分析法及氣流逆軌跡分析法來分析元素來源與回推氣流傳輸路徑及水溶性離子鉛同位素分析結果顯示,彭佳嶼海域大氣懸浮微粒中水溶性金屬離子濃度變化有明顯季節性,東北季風盛行時達到最高,夏季時各離子濃度為最低。主要受到人為污染、海水影響及地殼物質影響。
鉛同位素分析結果顯示水溶性鉛離子206Pb/207Pb(208Pb/207Pb)有明顯季節性差異,夏季鉛來源可能來自於台灣本島或東南亞,而其他季節應源自於中國大陸內地或東南沿海。
英文摘要 In this study, we collected 69 atmospheric aerosols samples from Peng Chia Yu(PCY), northeastern Taiwan, from April 1997 to March 2000. Different with previous studies, we used leaching method to get watersoluble
ions from aerosols to discuss the source of lead. We measured major and trace elements by ICP-MS and lead isotopes by MC-ICP-MS which set up in NCKU. Compared with chemical data, statistical data, and backward trajectories, the results show the concentration of water- soluble ions have seasonal variation that high values in winter and low in summer. Also, there are three main sources to affect the aerosols in PCY: anthropogenic, marine, crustal materials. Pb isotopic ratios, resembling those observed in Tainjin and Shanghai, China as well as many East Asian countries. The 206Pb/ 207Pb ratios were lower in summer and higher in winter/spring, gradually increased from 1997 to 2000, a trend that suggests that different lead addition in gasoline. Besides, the pathways passed through the industrial areas in China would show
high metal concentrations. Otherwise, the pathways passed through the ocean would be observed low metal concentrations.
Together with principal components analysis and backward trajectory analysis provide useful and complementary information to identify the contribution of lead sources. Again this demonstrates Peng Chia Yu has already been affected by Chinese pollution of long-range transport during the northeast monsoon season beginning in early fall and ending in late spring. By employing a two end-member mixing model based on the assumption that the summer case represents the local source end-member, the relative contributions of long-range transport for anthropogenic Pb have been estimated to be 27-44% in fall, 60-85% in winter, and 64-92% in spring.
論文目次 目錄
摘要......................................................i
誌謝....................................................iii
目錄.....................................................iv
表目錄.................................................. vi
圖目錄...................................................vi
第一章 前言...............................................1
1-1研究背景...............................................1
1-2研究目的...............................................5
1-3背景氣候概況...........................................5
第二章 研究方法...........................................6
2-1採集方法...............................................6
2-2分析方法...............................................6
2-2-1 水溶性離子金屬元素濃度分析.........................6
2-2-2 鉛同位素分析.......................................7
第三章 結果與討論.........................................8
3-1水溶性離子金屬元素濃度分布.............................8
3-1-1各水溶性離子金屬元素濃度隨時序變化情形...............9
3-1-2水溶性離子元素主成分分析............................16
3-1-3水溶性鉛離子濃度隨時序變化情形......................21
3-2 彭佳嶼大氣懸浮微粒中之鉛同位素變化...................26
3-2-1水溶性離子鉛同位素比值隨時序逐次變化情形............26
3-2-2水溶性離子鉛同位素比值逐月變化情形..................28
3-2-3水溶性離子鉛同位素隨季節變化情形....................30
3-2-4水溶性離子鉛同位素從1997年至2000年變化趨勢..........34
3-2-5彭佳嶼水溶性離子鉛同位素與東亞及東南亞地區
之比較.......................................35
3-2-6 1998年彭佳嶼與天津地區鉛同位素變化情形及評估
鉛同位素經長程傳輸的相對貢獻度...............37
3-2-7彭佳嶼大氣懸浮微粒鉛來源............................40
第四章 結論..............................................43
參考文獻.................................................45
附錄一...................................................50
附錄二...................................................52
附錄三...................................................54
附錄四...................................................55
附錄五...................................................56
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