碩士 / 國立臺灣海洋大學 / 海洋環境資訊系 / 107 / The total dissolved (TDHg), total particulate (TPHg), and sedimentary Hg in the the Danshuei Estuary, northern Taiwan, were determined in the present study. The sedimentary Hg were analyzed by the sequential extraction method (Bloom et al., 2003) which chemically divided the speciation into five fractions: water soluble (F1); human stomach acid soluble (F2); organo-chelated (F3); elemental Hg (F4); and mercuric sulfide (F5). The Hg concentration in the analyzed solutions were determined by the cold vapor atomic fluorescence spectrometry (CVAFS) combined with the amalgamation system.
The concentrations of TDHg and TPHg obtained within the Danshuei Estuary, northern Taiwan, ranged within 28-303 ng L-1 and 0.12-1.69 mg kg-1, respectively. The estuarine distributions of TDHg and TPHg exhibited no specific trend with the salinity. The values of distribution coefficient, log (KD), between the particulate and dissolved phases ranged within 3.76-4.57 and were independent upon the salinity in the estuary.
Total Hg concentrations in the estuarine sediment ranged within 15.65-475.21 μg kg-1 and were dominated by the element Hg fraction which contributed 39.26-82.33% (average 65.72%) of the total Hg pool. The mercury sulfide and organo chelating were the second and third important fractions which account for 1.90-31.84%(average 14.67%) and 0.22-25.69%(average 10.80%), respectively. The total concentrations of dissolved and sedimentary Hg found in the Danshuei estuary were significantly higher than those reported in literature, suggesting that Danshuei estuary was markedly contaminated by Hg element.
| Identifer | oai:union.ndltd.org:TW/107NTOU5276009 |
| Date | January 2019 |
| Creators | Liu, Ruei-Wen, 劉芮彣 |
| 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 |
Page generated in 0.0011 seconds