系統識別號 U0026-2508201415070300
論文名稱(中文) 天然有機物對水中砷之氧化還原特性研究
論文名稱(英文) Influence of Natural Organic Matters on the Redox Reaction of Arsenic in Natural Water
校院名稱 成功大學
系所名稱(中) 環境工程學系
系所名稱(英) Department of Environmental Engineering
學年度 102
學期 2
出版年 103
研究生(中文) 李晨瑜
研究生(英文) Chen-Yu Lee
學號 P56014204
學位類別 碩士
語文別 中文
論文頁數 124頁
口試委員 指導教授-林財富
中文關鍵字   高分子  鐵氧化物  中空纖維  有機物  氧化還原 
英文關鍵字 Adsorbent  Arsenic  Iron oxide  Polymer  Redox reaction 
中文摘要 砷為台灣西南部以及東北部地下水中常見的污染物,對人體具有急性及慢性的危害,我國飲用水水質標準為10 μg/L。由於傳統的淨水程序較無法有效去除砷,故有許多方法,例如吸附法,常被用於處理水中的砷,但是處理砷時,水中有機物常是影響砷型態及去除重要因素,本研究共分成兩部分,包括開發新型吸附材料以去除砷、以及探討天然水中有機物對砷型態之影響。
本研究結合高分子材料聚亞苯基楓以及合成鐵氧化物粉末,製成中空纖維條狀吸附劑,然後測試其對於砷的吸附效能。研究結果顯示,於pH值為7.5的情形下且砷的初始濃度約為10 mg/L時,本吸附劑對於三價砷的吸附效能較五價砷佳,每克吸附劑對於三價砷及五價砷的吸附效能分別為3.8及1.6毫克的砷。
本研究採集三種成功湖、嘉義地下水及鹽水地下水等三個天然水水樣,分別經0.45 μm濾膜以及奈米過濾後,分析水中有機物濃度、分子量大小、及類別等特性,再於水樣中添加1000 μg/L的三價砷或五價砷,進行砷的氧化還原動力實驗,以觀察砷的氧化還原情形。
英文摘要 Arsenic is commonly present in the groundwater of southwest and northeast of Taiwan. In this study, a novel adsorbent is developed to remove arsenic. In addition, as natural organic matter (NOM) may interact with arsenic in water, affecting the removal of arsenic. Therefore, the second part of this study is aimed to understand the impact of NOM on the oxidation-reduction of arsenic in water.
In the first part of the study, iron oxide powder was incorporated with a polymer material, to form a novel hollow fiber adsorbent, and was tested for the adsorption of arsenic. In the case of pH value of 7.5, initial arsenic concentration of 10 μg/L, the adsorption capacity of this adsorbent to As(III) is better than As(V).
To study the impact of NOM on arsenic speciation change, three natural water was collected and filtrated through different sizes of membrane, and studied for the characteristics of NOM in the water. The water was then spiked with arsenic and studied for the change of arsenic species and interaction with NOM.
Experimental results indicated that in the three water, although with different molecular weight and concentrations of NOM, As(III) was oxidized to As(V) within 10 days. However, only in one natural water, As(V) was reduced to As(III). As the most NOM in this natural water was with molecular weight (MW) of larger than 10,000Da, it is suspected that the large MW NOM may be responsible for the reduction of arsenic in the water.
論文目次 中文摘要 I
Abstract III
圖目錄 XIV
第一章 緒論 1
1-1 研究緣起 1
1-2 研究內容及目的 3
第二章 文獻回顧 4
2-1 砷的性質與危害 4
2-1-1砷的來源及對人體的危害 4
2-1-2環境中砷之水化特性 10
2-2水中砷之吸附去除 15
2-2-1 吸附法除砷技術 15
2-2-2鐵氧化物吸附劑 18
2-2-3高分子結合金屬氧化物複合材料的應用 28
2-2-4影響吸附效能之因子 31
2-3自然水體中的天然有機物 33
2-3-1天然有機物之介紹 33
2-3-2天然有機物特性分析 35
第三章 實驗材料與方法 45
3-1 高分子結合鐵氧化物合成中空纖維吸附劑 45
3-1-1 鐵氧化物粉末的製作 45
3-1-2 中空纖維吸附劑的製作 46
3-1-3 中空纖維吸附劑吸附砷之動力吸附測試實驗 48
3-1-4水樣中砷含量測定 49
3-2天然有機物對水中砷之氧化還原特性研究 53
3-2-1實驗程序 53
3-2-2水樣過濾 55
3-2-3三價砷/五價砷的氧化還原情形研究實驗 58
3-2-4有機物特性分析 59
第四章 結果與討論 63
4-1 高分子結合鐵氧化物製成中空纖維吸附劑 63
4-1-1合成鐵氧化物之特性 63
4-1-2 中空纖維吸附劑之特性 65
4-1-3 中空纖維吸附劑對於砷的吸附動力實驗 67
4-2 空白實驗 70
4-3 砷於成功湖水樣中的氧化還原情形 72
4-3-1 成功湖水樣有機物分析 72
4-3-2 砷的氧化還原情形 77
4-4砷於嘉義地下水水樣中的氧化還原情形 86
4-4-1 嘉義地下水水樣有機物分析 86
4-4-2砷在嘉義地下水水樣中的氧化還原情形 89
4-5 砷於鹽水地下水水樣中的氧化還原情形 94
4-5-1 鹽水地下水水樣有機物分析 94
4-5-2 砷的氧化還原情形 97
4-6 砷於自然水體中的氧化還原情形綜合比較 104
4-6-1自然水體中的有機物特性分析比較 104
4-6-2 砷的氧化還原情形綜合比較 109
第五章 結論與建議 114
5-1結論 114
5-2 建議 116
參考文獻 117
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