碩士 / 國立臺灣海洋大學 / 海洋環境資訊系 / 106 / In order to understand the present contamination status of the Danshuei River Estuary, the surface sediments, plants and organisms were collected from the Danshuei River Estuary to analyze the concentrations of trace metals (cadmium, cobalt, chromium, copper, iron, manganese, nickel, lead and zinc) in these samples. The sediment and biological samples were digested with aqua regia/HF and strong acid, respectively, and the trace metal concentrations in the digested solutions were analyzed by the atomic absorption spectrometry.
The concentrations of trace metals in sediments and organisms were as follows: Cd, DL-0.08 mg/kg; Co, 6.33-17.4 mg/kg; Cr, 24.2-57.0 mg/kg; Cu, 16.3-27.2 mg/kg; Fe, 3.06-3.38%; Mn, 126.3-209.5 mg/kg; Ni, 14.2-31.4 mg/kg; Pb, 5.35-7.39 mg/kg; and Zn, 62.8-122.8 mg/kg. The concentrations of the estuarine organisms were as follows: Cd, DL-0.017 mg/kg; Co,0.77-6.59 mg/kg; Cr,1.32-89.94 mg/kg; Cu,1.14-86.80 mg/kg; Ni, DL-5.61 mg/kg; Pb, DL-6.09mg/kg; and Zn, 22.68-166.15 mg/kg. The concentrations of trace metal, except Ni, in sediments of the Danshuei River Estuary were generally lower than the lower value of the sediment quality standards of EPA, Taiwan. However, the concentrations of Ni in some sediment samples were slightly higher than the regulation value (< 24 mg/kg), suggesting that the studied area was contaminated by Ni. The concentrations of trace metals in the biological sample significantly varied with the different samples. The health risk assessment of trace metal concentrations in fishes collected from the Tamsui River estuary was calculated and the results of the calculated value were generally less than 1 except for Cr of which value could exceed 2.
| Identifer | oai:union.ndltd.org:TW/106NTOU5276020 |
| Date | January 2018 |
| Creators | Chou, Huei-Yi, 周慧怡 |
| Contributors | Fang, Tien-Hsi, 方天熹 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 38 |
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