結論及建議 - 大仁科技大學環境管理研究所

三鹵甲烷為淨水廠清水中消毒常見的消毒副產物種，此水質參數影響三鹵甲烷形成相當重要；研究中先選定五個重要因子，依實驗設計規劃出 I=ABCDE 及 I=-ABCDE 各 16 組試程，透過 STATISTICA 分析軟體進行 Chrorine dosage、Bromide、Humic Conc.、Reaction Time、Temp.

因子對反應因變數包括三鹵甲烷物種、有機物光譜特性(含螢光及紫外光吸收)，及變數間之交互作用對目標值之影響；三鹵甲烷副產物與光譜特性之相關性分析，與含氯及溴消毒副產物形成模式推估之重要發現如下：

1. 無論高或低加氯量，當溴離子、腐質酸、反應時間及溫度均屬高水準，

可形成較高 TTHM 濃度，主要含溴消毒副產物為最高，部分試程之 TTHM 濃度均高於現法令規範值。

2. 對 TTHM 分別 Cl-THMs 及 Br-THMs 物種形成之主要因素，在 Cl-THMs 物種形成影響最大因素為溴離子及腐質酸，前者屬負相關，

後者屬正相關；而 Br-THMs 物種形成最大因素則以溴離子及腐質酸，

均屬正相關；但溴離子與腐質酸交互作用方面，對 Cl-THMs 及 Br-THMs 物種具有很大的效應，前者屬負相關，後者屬正相關。

3. 關於螢光光譜特性分析，黃酸(EX240-260/EM430-450 nm)及腐植酸 (EX310/EM430-440 nm)之成份變動，兩者均受溴離子及腐質酸濃度影響，均屬負效應；此均顯示次氯酸與水中溴離子作用形成之 HOBr 競爭有機物之速率高於 HOCl 與有機物之反應速率。

4. 三鹵甲烷物種與主要有機物參數之相關性分析，CHCl2Br 與黃酸、色胺酸、腐質酸、Total AFI 有高度相關，含氯消毒副產物方面，與黃酸、

腐植酸、Total AFI、V 及 III+V 有高度相關性。

5. 含氯消毒副產物形成模式為

27.05 - 0.04  X

- 9.21  X

+ 11.19  X

+

7.12  X + 8.42 X - 2.64  X  X - 8.96  X  X - 5.15  X  X + 2.05

17.18  X

 X

+ 10.49  X

 X

+ 7.18  X

 X

+ 6.68  X

 X

，因素與

因素間交互作用之變異共可解釋約 96 %及 92 %的含氯及含溴消毒副產物之變異。

5-2 建議

1. 利用反應曲面法，深入探討因素間交互作用影響，經由反應曲面分析所得的統計資料和迴歸方程式來瞭解各因數間的交互作用，可真正達到深入探討多因素對其系統的貢獻程度，同時根據數學理論求得最適的實驗情況，同時利用配適反應方程式繪出模式三度空間曲面圖與等高圖，觀察並分析出最適的影響條件。

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