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研究生(外文):Rong-Shan Liang
論文名稱(外文):Using Geochemistry to Study of the Treatment Efficiency of Hebao Island Constructed Wetlands in Chiayi County
指導教授(外文):Hsueh-Yu Lu
口試委員(外文):Wen-Fu ChenSheng-Wei Wang
外文關鍵詞:Constructed wetlandaqueous geochemical modelingremoval efficiencystatistical analysis
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  Constructed wetland (CW) is a cost-effective natural system and can remove considerable amount of various pollutants, such as suspended solid, ammonia, organic carbon and heavy metals. It has been extensively applied in wastewater treatment. CW is a complicated system which involves physical, chemical, and biological process. To increase the pollutant removal efficiency, a detailed study on an individual CW is necessary. The Studied CW, named as Hebao Island free water surface CW, is located in Chiayi County, Taiwan. It is composed of 3 units. In this study, the water samples were sequentially collected along the flow path to determine the geochemical evolution with hydrochemical analyses, statistical analyses and aqueous geochemical modeling.
  The results of hydrochemical analysis demonstrate considerable increase of dissolved oxygen along the flow path. It is believed that aquatic plants bring in both of oxygen and organic matter. However, high removals (50%-100%) of COD, ammonia, phosphate, manganese and iron can be observed in this study. On the other hand, the aqueous geochemical modeling shows considerable cation exchange of Na+K and Ca+Mg between water and sediment. In addition, iron and manganese in Hebao Island are removed by the precipitation of hematite (or iron hydroxide) and pyrolusite (or manganese hydroxide); therefore, most of heavy metals could be removed by being absorbed by hematite and pyrolusite. However, arsenic and uranium demonstrate opposite trend with negative removals. According to the thermodynamic simulation, arsenic and uranium are positive-charged compounds in a neutral to alkaline water and would not be removed by positive-charged hydroxides. The results of statistical analysis demonstrate that the removals of pollutants are dependent on pH value of water which could result from photosynthesis process.
致謝 I
中文摘要 II
Abstract III
目錄 IV
圖目錄 VI
表目錄 VII
第一章 緒論 1
1.1 研究動機 1
1.2 研究目的 2
第二章 人工濕地簡介 3
1.3 人工濕地構造與污染物之前人研究 7
1.3.1 人工濕地構造 7
1.3.2 移除目標 11
第三章 研究方法 17
2.1 研究區域概況與樣本採集 17
2.1.1 研究區域 17
2.2.2 採樣方法 22
2.2 儀器分析 23
2.2.1 陰離子分析 23
2.2.2 陽離子分析 23
2.2.3 化學需氧量分析 25
2.3 水化學模擬 26
2.4 統計分析 28
第四章 結果與討論 30
3.1 基本水質分析結果 30
3.2 營養鹽分析結果 33
3.3 主要元素分析結果 36
3.4 次要元素分析結果 37
3.5 微量元素分析結果 41
3.6 稀土元素分析結果 47
3.7 水化學模擬結果 49
3.8 統計分析結果 54
第五章 結論與建議 57
4.1 結論 57
4.2 建議 59
參考文獻 60
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