原名「台灣學術線上」
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dvd臺灣農村規劃的在地美臺灣獵鹿季節
   
   
   
     
   
 
項次 書目
1
題名:Transport and Behavior of Trace Metals in the Tsengwen River and Estuary    
曾文河川及河口地區微量金屬之輸送及行為研究
著者:Jia-Jang Hung(洪佳章)
出版地區:台灣
出版城市:台北市
學科:地球科學
刊名:Terrestrial, Atmospheric and Oceanic Sciences
卷期:1卷3期(1990.9)
頁碼:275-295
語言:英語
摘要: 中文摘要PDF ; 英文摘要PDF

本研究係探討鐵、錳、鎘、銅、鉛、鋅等微量元素在曾文河川及河口地區之地化行?與輸送機制。曾文溪河川溶解態金屬,均在中游或下游有較高的分佈。一般而言,微量金屬濃度均比世界河川背景?稍高,但比污染嚴重之河川?低。溶解態鐵、錳、銅、鉛、鋅在河口地區均有移除現象發生,而鎘則未有顯移除或添加現象。懸浮顆粒與沉積物金屬在河川中游亦有較高的濃度,但在河口各站中均未有明顯的分佈差異。由地化累積指數可以看出懸浮顆粒與沉積物金屬之富集程度依序?Pb、Cd>Cu、Zn>Fe、Mn。 曾文河川中微量金屬元素主要經由懸浮顆粒之輸送,約佔總輸送量之93%以上,且在輸送過程中已受到人?污染之影響。顆粒性微量金屬元素之物種分佈取決於元素種類。鐵及鉛主要存在於鐵錳氧化物及礦物晶體中。錳、銅、鋅、鎘則除了分佈於鐵錳氧化物及礦物晶體外,亦分別在交換性及碳酸鹽相、碳酸鹽及有機相、碳酸鹽相、及交換性相有明顯的分佈。利用箱型模式估算結果發現,對輸入河口的鐵、錳、鎘、銅、鉛、鋅而言,分別有56%,76%,114%,67%,84%及73%的溶解態以及35%,32%,28%,29%,39%,及50%之顆粒態通過河口進入台灣海峽。因此河口中溶解相與顆粒相中金屬元素之質量差異部份相信已沈積於河口之沈積物中。
Studies on the transport mechanisms and behaviors of six trace metals (Fe, Mn, Cd, Cu, Pb and Zn)in the Tsengwen river and estuary were performed for the high-flow and low-flow seasons. Dissolved metals in the Tsengwen river are slightly higher than those in the pristine rivers but much lower than those in the heavily polluted rivers of the world. The riverborne dissolved Fe, Mn, Cu, Pb and Zn exhibited significant removals in the early estuarine transport; for Cd, however, this was likely controlled by the mixing process in the estuary. Particulate and sediment metals, similar to dissolved metals, showed elevated concentrations in the middle river, but there was little difference throughout estuarine locations. The enriched levels of particulate and sediment metals with reference to backgrounds (shale's metals) were found in a sequence of Pb, Cd>Zn, Cu>Fe, Mn. Trace metals were principally transported by suspended particulates, accounting for over 93% of the total gross fluxes. Particulate Fe and Pb are mostly concentrated in the Fe-Mn hydroxides and crystalline fractions. Particulate Mn, Cu, Zn and Cd distribute rather significantly, in addition to Fe-Mn hydroxides and crystalline fractions, in exchangeable and carbonate phases, carbonate and organic phases, carbonate phase, and exchangeable phase, respectively. The particulate speciation shows little difference between river water and estuarine water. The net fluxes of metals out of the estuary are modeled to be approximately 56%,76%,114%,67%,84% and 73% of dissolved influxes as well as 35%,32%,28%,29%,39% and 50% of particulate influxes, respectively for Fe, Mn, Cd, Cu, Pb and Zn. The imbalance of metals between the dissolved and particulate phases is thought to result from metal deposition in the estuary.


    

本卷期目次
Terrestrial, Atmospheric and Oceanic Sciences 1卷3期 (1990.9)
A Method of Estimating the Block-Like Body Under the Ground from the Polarization Ellipse of the Magnetic Field/ Chieh-Hou YangLun-Tao Tong
The Characteristics of Microtremors at the Site of SMART1 Array/ Win-Gee HuangYeong-Tein Yeh
Solar and Lunar Daily Geomagnetic Variations at Lunping from 1966 to 1989/ Yinn-Nien Huang
Transport and Behavior of Trace Metals in the Tsengwen River and Estuary/ Jia-Jang Hung
On the Mixing of Waters at a Northern Offshore Area of Taiwan/ Ching-Sheng ChernJoe Wang
 
   
 
   

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