碩士 / 國立高雄科技大學 / 海洋環境工程系 / 107 / Salt River which is an artificial river running through the Linhai Industrial Park is the largest industrial park in southern Taiwan, and eventually out of the Kaohsiung Harbor. Salt River is mainly used to as a drainage channel to receive the wastewater effluent from Linhai Industrial Park and sewage water from local residents. This study aimed to investigate the existence of organic pollutant, namely polycyclic aromatic hydrocarbons (PAHs) in estuary of Salt River. A total of 16 representative sampling sites in estuary of Salt River was selected. The concentration of 16 PAHs in water and sediment are measured to assessthe distribution, levels, and orginal sources of PAHs. Potentially ecological toxicity of PAHs in Salt River was also evaluated.
Results indicate that the total PAHs concentrations in water, suspended particulate matter(SPM) and sediments were in the range of 1852±3858 ng/L, 63±74 mg/kg dw and 3.9±10.6 mg/kg dw, respectively. The highest concentration in sediment was found at the estuary, and the level of PAHs in the SPM decreased from the upper stream and to the sea. The results indicate that PAHs discharged into Salt River stabilized in sediments of the estuary. The possible source of PAHs in sediments was mainly originated from coal combustion except for Site 5, which was the mixture of oil and coal combustion. Based on TEQ and m-ERM-q, the PAHs level in sediment at the upstream and middle stream posed low potential ecotoxicity; while the downstream, estuary, and sea region had the moderate potential ecotoxicity of PAHs. The partitioning coefficient (log Koc) of the PAHs between water-sediment and water-SPM were2.7–4.3 and 4.7–6.1, respectively, which increased with the ring number of PAHs. The positive relationship was significant for log Koc and log Kow (water-sediment: r = 0.63, p < 0.05; water-SPM: r = 0.53, p < 0.05). The net flux of PAHs ran from SPM to seawater for LPAHs and MPAHs (ff=0.69–0.98), and from water to sediment for all 16 PAHs (ff=0.01–0.48).
PAHs pollution in Salt River mainly were contributed from industrial activity. PAHs posed a relatively high potential ecological risk to local benthic organisms.
| Identifer | oai:union.ndltd.org:TW/107NKUS0282006 |
| Date | January 2019 |
| Creators | SU, YU-CI, 蘇昱齊 |
| Contributors | DONG, CHENG-DI, 董正釱 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 212 |
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