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研究生:張伯英
研究生(外文):Po-Yin Chang
論文名稱:台灣海峽北部海域重金屬分佈
論文名稱(外文):The distribution of trace metals in the northern Taiwan Strait
指導教授:方天熹方天熹引用關係
指導教授(外文):Tien-His,Fang
學位類別:碩士
校院名稱:國立臺灣海洋大學
系所名稱:海洋環境資訊學系
學門:工程學門
學類:環境工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:112
中文關鍵詞:微量金屬分佈係數台灣海峽顆粒態溶解態
外文關鍵詞:trace metalpartition coefficientTaiwan Straitparticulate phasedissolved phase
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本研究利用海研二號於2007年3月及7月在台灣海峽北部海域採樣,分析海水中溶解態及顆粒態重金屬元素(Cd、Cu、Fe、Mn、Ni、Pb、Zn)濃度,其中顆粒態重金屬共分析非殘留相(1N HCl萃取)與殘留相(王水萃取),由重金屬元素在溶解態及顆粒態的濃度進而計算元素在兩相間之分佈係數( log Kd),以瞭解台灣海峽海域中重金屬元素之傳輸與分佈。研究海域海水中溶解態重金屬元素濃度範圍如下: Cd,0.05-0.58nM; Cu,0.99-6.03nM; Fe,5.11-96.25 nM; Mn,0.93-6.64 nM; Ni,1.75-14.89 nM; Pb,0.003-0.18 nM;與Zn,7.93-27.62 nM。而顆粒態重金屬元素總濃度範圍如下: Cd,0.09-5.05 μg/g; Cu, 0.57-235.09 μg/g; Fe,0.08-9.2 %; Mn,38.49-3100 μg/g; Ni,11.32-480 μg/g; Pb,0.21-21.93μg/g;與Zn,29.15-379μg/g。

研究海域海水中重金屬元素,在近岸測站其溶解態濃度並無明顯高於海峽中間測站,但鄰近中國大陸沿岸測站其顆粒態之鐵、錳濃度,與台灣近岸測站之顆粒態鎳濃度則明顯高於海峽中間測站,此結果顯示近岸測站受陸源物質影響以顆粒態較明顯,而調查海域中大部份重金屬元素,其濃度主要以顆粒態存在,其佔總濃度之百分比與排序分別為: 鐵( >80%) > 錳( 70-95%) > 鉛(10-95%) > 鎳(20-80%) > 銅(5-60%) > 鋅(10-30%) > 鎘(0.1-5%)。而各元素在顆粒態與溶解態之分佈係數( log Kd)分別為:鐵,6-8;錳,5.5-7;鉛,5-7;鎳,5-6.5;銅,4-6;鋅,4.5-5.5;與鎘,3-4.5,其中近岸測站之Kd值較離岸測站為高。在顆粒態重金屬濃度,除了錳之外,其它元素(鎘、銅、鉛 鐵、鎳、鋅)主要存在於殘留相,佔顆粒態重金屬總濃度之60-98% 而錳只佔30%以下,其主要存在於非殘留相。
The distribution and concentrations of trace metals (Cd、Cu、Fe、Mn、Ni、Pb、Zn ) in seawater, including dissolved and particulate phases, off the northern Taiwan Strait were investigated by two surveys. The concentrations of particulate metals were chemically divided into non-residual and residual fractions. In addition, the values of partitioning coefficient between dissolved and particulate phases of the studied metals were calculated. The concentration ranges of dissolved trace metals in the study area were: Cd, 0.05-0.58nM; Cu, 0.99-6.03nM; Fe, 5.11-96.25 nM; Mn, 0.93-6.64 nM; Ni, 1.75-14.89 nM; Pb, 0.003-0.18 nM; and Zn,7.93-27.62 nM, respectively.

The spatial distribution of dissolved metals in the study area did not show that the concentration decreased with seaward. In contrast, the spatial distribution of particulate metals, such as Fe, Mn and Ni, exhibited that the concentration decreased with seaward. Both results suggest that the concentrations of trace metals in the coastal seawater influenced by the terrestrial input were more significant in the particulate phase than the dissolved phase. Total concentrations (dissolved + particulate phase) of trace metals in seawater of the studied stations were most dominant in the particulate phase. The percentage of particulate phase to the total metal concentrations and the sequence were: Fe ( >80%) > Mn( 70-95%) > Pb ( 10-95%) > Ni( 20-80%) > Cu( 5-60%) > Zn( 10-30%) > Cd( 0.1-5%). The partitioning coefficient ( log Kd) between particulate and dissolved phase of trace metals was:Fe, 6-8; Mn, 5.5-7; Pb, 5-7; Ni, 5-6.5; Cu, 4-6; Zn, 4.5-5.5; and Cd, 3-4.5. The values of log Kd found in the inshore stations were generally higher than those of the offshore stations. With the exception of Mn, the concentrations of particulate trace metals were chiefly dominant in the residual phase, accounting for more than 60-98% of the total particulate trace metals concentrations. In contrast, the concentration of particulate Mn was dominant in the non-residual phase, accounting for more than 70% of the total particulate concentration.
摘 要 II
Abstract IV
目錄 VI
圖目錄 VIII
表目錄 X
第一章 緒論 1
1.1地理位置及構造 1
1.2海流與水文特性 1
1.3台灣海峽北部海域的化學相關研究 3
1.4重金屬元素在大陸棚分佈特性 5
1.5研究目的 8
第二章 採樣與分析方法 11
2.1 採樣時間與位置 11
2.2 樣品處理 11
2.3 溶解態重金屬(Cd、Cu、Fe、Mn、Ni、Pb、Zn) 12
2.3.1藥劑準備 13
2.3.2 溶劑萃取過程 15
2.4 石墨式原子吸收光譜儀偵測重金屬元素濃度 16
2.5 重金屬元素濃度計算 17
2.6 顆粒相重金屬元素(Cd、Cu、Fe、Mn、Ni、Pb、Zn) 18
2.6.1 分析方法 18
2.6.2藥劑準備 19
2.6.3 非殘留相 19
2.6.4 殘留相 20
第三章 結果與討論 25
3.1 溫鹽分佈 25
3.2營養鹽 31
3.3 溶解態重金屬(Cd、Cu、Fe、Mn、Ni、Pb、Zn) 37
3.4 總顆粒態重金屬分佈(Cd、Cu、Fe、Mn、Ni、Pb、Zn) 56
3.5分佈係數(Cd、Cu、Fe、Mn、Ni、Pb、Zn) 77
第四章 結論 88
參考文獻(中文部分) 89
參考文獻(英文部分) 91
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