碩士 / 國立臺灣海洋大學 / 海洋環境資訊系 / 107 / The trace metal (Al, Co, Cr, Cu, Fe, Mn, Ni, Pb, Zn) contents, grain size (GS) and total organic carbon(TOC) in sediments of the Mai Liao coast, central Taiwan, were seasonally investigated during 2017. The species of trace metal in sediments were analyzed by the sequential extraction method which divides the metal species into five fractions: exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter and residual. The enrichment factor (EF), geo-accumulation index (Igeo) and sediment quality guidelines(SQGs) of Taiwan and USA were employed to evaluate the trace metals contamination status of the study area. With the exception of Ni, the analysed data show that the total metal concentrations were generally lower than the SQGs value. While, Ni concentration generally exceeded the SQGs value (20.9 mg/kg). The EF and Igeo results indicate that Co and Pb were mildly contaminated and the othe trace metals were not contaminated. The concentrations of Al, Co, Cr, Fe, Ni and Zn were dominated in the residual fraction, averagely exceeding 70% of the total pool. Copper and Pb in the residual fraction nearly equalized to the organic fraction and both fractions accounted for ca.70% of the total pool. The concentration of Mn was dominated by the carbonates, Fe-Mn oxides and residual fractions, and each fraction occupied ca.30% of the total pool. Finally, it found that the metals concentrations generally positively correlated with TOC and negatively correlated with GS, suggesting that GS and TOC strongly influenced the distribution of trace metals concentrations in the Mai Liao coastal sediment.
| Identifer | oai:union.ndltd.org:TW/107NTOU5276008 |
| Date | January 2019 |
| Creators | Chang, Jie-Ren, 張傑仁 |
| 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 | 69 |
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