以鹼活化過硫酸鹽氧化法降解地下水中有機污染物之研究

Degradation of organic contaminants in groundwater using alkaline-activated persulfate

劉冠余(Kuan-Yu Liu)

指導教授 ： 陳谷汎

國立暨南國際大學/科技學院/土木工程學系/碩士(2013年)

摘要

甲基第三丁基醚(methyl tert-butyl ether, MTBE) 及1,2- 二氯乙烷
(1,2-dichloroethane, 1,2-DCA)為地下水常見之污染物，前者廣泛利用於汽油添加劑，
後者為氯乙烯(vinyl chloride, VC)之製備原料，兩者皆具有不易整治及疑似人體致癌
性之特性。本研究以鹼活化過硫酸鹽程序處理受MTBE 及1,2-DCA 污染之地下水，
針對不同pH 及不同污染物之實驗因子進行探討，以瞭解鹼活化過硫酸鹽程序所需
之pH 值以及其對不同污染物處理之效果。此外，以工業廢棄物活化過硫酸鹽之可
行性，亦於本研究中進行探討。本研究之主要目的包括：(1)探討鹼活化過硫酸鹽程
序所需之pH 值；(2)探討鹼活化過硫酸鹽程序對不同污染物之處理成效；及(3)評估
工業廢棄物鹼活化過硫酸鹽之可行性。
實驗結果顯示，鹼活化過硫酸鹽程序能有效加速1,2-DCA 之降解。鹼活化過硫
酸鹽程序會降低MTBE 降解速率，但能有效抑制反應過程中副產物TBA (tert-butyl
alcohol)、TBF (tert-butyl formate)的生成。工業廢棄物-轉爐石(basic oxygen furnace
slag, BOF slag)能驅動過硫酸鹽鹼活化，有效加速1,2-DCA 之降解，且沒有重金屬溶
出的現象。本研究之成果將可提供相關受污染場址進行整治之參考，但鹼活化過硫
酸鹽氧化法去除污染物之機制複雜，因此未來應用於不同污染物處理前，仍有必要
針對各種污染物逐一謹慎評估其適用性，以避免降解延遲之情形發生。

關鍵字

MTBE ； 1,2-DCA ； 過硫酸鹽 ； 鹼活化 ； 工業廢棄物 ； 轉爐石

並列摘要

Methyl tert-butyl ether (MTBE) and 1,2-dichloroethane (1,2-DCA) are common
groundwater pollutants. MTBE is widely used as a gasoline additive while 1,2-DCA is
used for the production of vinyl chloride (VC). Both pollutants are difficult to be
remediated and may cause cancer. In this study, alkaline-activated persulfate was used to
treat MTBE- and 1,2-DCA-contaminated groundwater. Batch experiments were
conducted under different pH to determine the required pH for alkaline-activated
persulfate reaction. Furthermore, the potential of alkaline-activated persulfate by
industrial waste was also evaluated. The main objectives were to: (1) investigate the
required pH for alkaline-activated persulfate; (2) evaluate the degradation efficiency of
MTBE and 1,2-DCA by alkaline-activated persulfate; and (3) evaluate the potential of
industrial waste to drive alkaline-activated persulfate process. Results show that
alkaline-activated persulfate can effectively accelerate the degradation of 1,2-DCA.
Alkaline-activated persulfate reduced the degradation rate of MTBE and inhibited the
production of MTBE-degrading byproducts, tert-butyl alcohol (TBA) and tert-butyl
formate (TBF). Persulfate activated by industrial waste basic oxygen furnace slag (BOF
Slag) enhanced the degradation of 1,2-DCA. No heavy metals were released from BOF
slag during the experiments. Results of this study would be helpful to design a practical
system for the treatment of contaminated sites. Since the mechanisms of contaminant
removal by alkaline-activated persulfate are complicated, feasibility study is necessary
III
before alkaline-activated persulfate is applied to other target compounds to avoid the
retardation of contaminant degradation.

並列關鍵字

MTBE ； 1,2-DCA ； persulfate ； alkaline activation ； industrial waste ； basic oxygen furnace (BOF) slag

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