碩士 / 國立中山大學 / 海洋資源學系研究所 / 90 / Abstract
Studies of phase speciation of trace metals were conducted in Kaohsiung harbor and coastal areas in April and May 2002. Water samples were collected from three different sampling stations to study the spatial distribution of metal species. Colloidal and truly dissolved subsamples were observed by cross-flow filtration treatment.
The results show that TOC of seawater samples ranged from 4.17 mg/L to 7.17 mg/L. For trace metals, zinc had the highest concentration(7.21 μg/L ∼14.14 μg/L), followed by manganese(3.31 μg/L ∼ 11.73 μg/L), copper(0.28 μg/L ∼ 7.57 μg/L), lead(2.41 μg/L ∼ 4.41 μg/L), nickel(1.78 μg/L ∼ 2.97 μg/L). Highest concentrations of TOC and metals were observed in Kaohsiung harbor(S1), and the values decreased in the order of S1 ＞ S2 ＞ S3.
Distribution of phase speciation of trace metals varied with location. Nickel existed in truly dissolved phase predominately(66 ﹪at S1, 79.7 ﹪at S2 and 84.6 ﹪at S3). For the other metals, either particle or truly dissolved phase was the major species at each sampling station. For zinc, 56.1 ﹪at S1 was in truly dissolved phase, 68.1 ﹪at S2 and 59.6 ﹪ at S3 were in particulate phase. For copper, 67.5 ﹪at S1 was in particulate phase, 56.7 ﹪at S2 and 89.9 ﹪at S3 were in truly dissolved phase. For manganese, 56.3 ﹪at S1 was in truly dissolved phase, 79.8 ﹪at S2 and 72.1 ﹪at S3 were in particulate phase. For lead, 51.7 ﹪at S1 and 66.0 ﹪at S3 were in truly dissolved phase, 63.5 ﹪at S2 was in particulate phase.
The percentages of TOC and metals in colloidal phase of the filter-passing pool were low at all sampling stations and decreased in the order of S1 ＞ S2 ＞ S3. They were found predominately in truly dissolved fraction. The results also show that Kaohsiung harbor (S1) had the highest percentage of colloidal fraction, followed by coastal water (S2), open sea (S3).
Values of partition coefficient between colloids and true solution(Kc ) in the Kaohsiung harbor and nearby coastal areas were lower than the Kc values observed in Galveston Bay during July 1995.
| Identifer | oai:union.ndltd.org:TW/090NSYS5277024 |
| Date | January 2002 |
| Creators | He-Jung Wu, 吳和融 |
| Contributors | Wei-Hsien Wang, 王維賢 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 85 |
Page generated in 0.0017 seconds