碩士 / 東海大學 / 環境科學與工程學系 / 103 / As the development of the global industry rapid, the effluent wastewater release to environment without treatment, and lead to the heavy metal contamination of farmland and soil. The contaminants also may transfer to the groundwater by eluviation. There are many pollution sources distributed across the central river basin and Changhua costal areas. The discharge of wastewater may release heavy metals to the associated water bodies, thereby deteriorate the water quality and accumulation in the sediment, which is the matter that deposited on the bottom of the river, and transmitted via the water flow. When the surrounding environment changes, it may make the heavy metals in sediment re-released into the water.
It is plenty of ecological resources from Wu river north bank to the Zhuoshui river south bank, including Da-Du and Da-Cheng wetland. Heavy metal residues in contaminated habitats may accumulate in aquatic flora and fauna, which may enter into human food chain and result in health problems. USEPA set the maximum contaminant level for drinking water, which long-term exposure to the concentration may cause liver or kidney damage, allergic dermatitis and high blood pressure. The objective of this study is to survey the distribution of heavy metals in the sediment around central river basin and Changhua costal areas, and to discuss the relationship between soil characteristics and heavy metals concentration.
The result of heavy metal distribution shows that Fazih River contained higher amounts of Cu, Zn and Ni. The levels of such metals exceeded the top limits of sediment quality criteria. Due to the relatively higher flow rate in the Wu River, the heavy metal contents were generally lower than the top limits of sediment quality criteria. At Chang-hua costal area, the heavy metal contents were generally lower than the top limits of sediment quality criteria. The result of correlation analysis, at Wu river exhibited a significantly correlation between TOC and Cu, Zn, Ni, Pb, and Cr. Amorphous Fe and Al also have correlation with Cu, Zn, Ni, Pb, and Cr. At Chang-hua costal area, Neither Eh value and rainfall have correlation with Cu, Zn, Cd, Ni, Pb and Cr. TOC have correlation with that of Cu, Zn, Cd, Ni, Pb, and Cr. Temperature have correlation with Cd, Ni, and Pb. Cu, Ni,Cr, Cd and Pb exhibited the strong correlation with amorphous Fe and Al. pH value exhibited the positive correlation with Cd, Ni,and Pb, but negative correlation with Cr, Cu, and Zn.
| Identifer | oai:union.ndltd.org:TW/103THU00518015 |
| Date | January 2015 |
| Creators | Huang, Ching-Yi, 黃瀞儀 |
| Contributors | Liu, Yu-Ting, 劉雨庭 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 74 |
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