第五章 結論與建議
5.2 建議
1. 零價鋁於本研究中僅限於去除過氯酸鹽,未來可進一步探討不同陰離 子之污染物,例如NO3-、PO4-等,使零價鋁去除更具實用性。
2. 本研究配製零價鋁僅限於利用酸洗反應,未來可將其改質(例如:添加 界面活性劑、增加表面積與電荷),應用在廢水處理實務上。
3. 針對本研究可進一步套用表面錯合模式(Surface complexation model) 分析,與液相內之陰、陽離子產生錯合反應,而形成表面錯合物,
此模式可以同時探討水溶液中多種離子被吸附的型態。
4. 進行管柱實驗,確認氫氧化鋁之最佳可行性,而深入探討其最佳操作 條件,以達到去除污染物之成效與貢獻度。
第六章 參考文獻
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附錄
口試委員意見回覆 口試委員: 台灣大學環境工程研究所 吳先琪 教授
1. 本研究目的中,有提到兩種去除機制,是否拿到文獻回顧比較好?
回覆: 已修正於論文 p.16 與 p.30。
2. 論文中第三章實驗方法,是否改寫成文章,不要用條列式比較好?
回覆: 已修正於論文 p.43。
3. 確認氯離子被吸附在氫氧化鋁表面之質量平衡
回覆: 實驗部份已補做,並列於論文 p.82 中重新修正。
4. 論文中提到溫度對吸附之影響,過氯酸鹽被氫氧化鋁吸附後,為什麼 會濃度回升?
回覆: 實驗部份已補做,並列於論文 p.75 中重新修正。
5. 論文中氯離子與硫酸根脫附劑的比較,是否標示加入時間?
回覆: 實驗部份已補做,並列於論文中重新修正。
6. 結論中有提到氫氧化鋁是一種良好吸附劑,是否可修改一下,結論下 的太果斷?
回覆: 已做修改論述 p.85~p.86。
7. 對於氫氧化鋁吸附過氯酸鹽,套用 Langmuir Isotherm 與 Freundlich Isotherm,建議可用表面錯合模式(surface complexation model)套用
回覆: 已放在論文 p.86 建議部份回覆。
口試委員: 義守大學土木與生態工學系 翁誌煌 教授
1. 本研究利用零價鋁去除過氯酸鹽,是否存在還原反應機制?
回覆: 經由系統性實驗證實,本研究去除機制主要是藉由吸附作用。
2. 本研究中是否有利用零價金屬去除氯酸鹽與次氯酸鹽?
回覆: 本研究利用零價金屬去除氯酸鹽與次氯酸鹽,此化合物易被 還原。
零價鋁金屬 5g 去除氯酸鹽
Time (hr)
0 1 2 3 4 5
ClO3- (mM)
0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16
ClO3 -Cl
-3. 論文中文獻回顧零價鐵,建議填寫鐵之尺寸.
回覆: 已修正於論文 p.17
4. 本研究零價鋁金屬與氫氧化鋁之粒徑大小?
回覆: 已在論文中論述。
5. 在不同 pH 值條件下,零價鋁還原過氯酸鹽實驗,建議需重覆試驗 回覆: 已在修正於論文 p.63~p.64
6. 本研究添加硫酸鎂當脫附劑,是利用氫氧根還是硫酸根致換過氯酸鹽?
回覆: 主要是藉由硫酸根置換過氯酸鹽,其原因硫酸根親和力強,有足夠 能力取代過氯酸鹽。
7. 論文中再生性實驗,是否需要再重覆試驗?
回覆: 實驗部份已補做,並於論文 p.81~p.83 重新修正。
8. 氯離子與硫酸根濃度建議使用 mol/L 回覆: 已統一使用當量濃度。
9. 論文中零價鋁金屬於不同 pH 值去除 10 mg/L 過氯酸鹽,是否把反應 時間縮短,與求反應速率常數?
回覆: (a) 反應時間已縮短。
(b) 零價鋁在反應過程中會產生自發性放熱,溫度無法定溫,故無 法正確性求出反應速率常數,會放在建議部份。
10. 本研究氫氧化鋁吸附過氯酸鹽,套用 Freundlich Isotherm 等溫吸附模
式,其中n 值代表有利於吸附?可用線性求解?
回覆: 依該模式表示,當 n>1 為有利吸附,n<1 為不利吸附,本研究 n 值大於1,故是有利於吸附的。
口試委員: 高雄大學土木與環境工程學系 袁菁 教授
1.論文第三章建議把研究架構做為 3.1 節討論,並把架構分為兩部份,讓 研究鮮明易懂
回覆: 已修正於論文 p.39。
2.QA/QC 是否有做?
回覆: QA/QC 已放於論文 p.52~53。
3.論文中文獻引用之編排、格式、引用,需再重新確認 回覆: 已修正於論文。
4.論文中第三章實驗材料,建議標示分析級與試藥級 回覆: 已修正標示清楚每藥品等級於 p.40。
5.論文單位表示問題,建議 HR 應改 hr,ppm 改成 mg/L,測氫氣 cc 數改 mL
回覆: 已修正單位表示。
6.零價鋁金屬在放熱過程中會產生氫氣,氫氣如何偵測?是否有質量平衡?
回覆: 本研究使用針筒量測氫氣,該方法在論文 p.39 述說。
7.論文中圖 4-9 與圖 4-10 建議合併放在一起比較 回覆: 已修正於論文中。
8.論文中圖 4-12,零價鋁去除過氯酸鹽於溫度 75~80°C 反應,溫度的準 確性?溫度對過氯酸鹽之影響是否可用熱力學計算?
回覆: (a) 於恆溫培養箱操作,溫度準確性 80±2°C。
(b) 本研究目前沒探討到熱力學部份。
9.可比較本研究氫氧化鋁與活性碳之差異性?
回覆: 本活性碳文獻回顧都是利用管柱實驗來探討吸附量,而本研究為批
回覆: 本活性碳文獻回顧都是利用管柱實驗來探討吸附量,而本研究為批