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題 名 | 過氧化氫在UV光照射下之裂解行為研究:氯離子及硝酸根離子之影響效應=UV-Decomposition of Hydrogen Peroxide in the Presence of Chloride and Nitrate Ions |
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作 者 | 廖志祥; 盧明俊; 曾明加; | 書刊名 | 嘉南學報 |
卷 期 | 24 1998.11[民87.11] |
頁 次 | 頁75-85 |
分類號 | 445.6 |
關鍵詞 | 過氧化氫; 紫外線; 氯離子; 硝酸根離子; Hydrogen peroxide; Ultraviolet light; Chloride ion; Nitrate ion; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究之目的,係在探討過氧化氫/ 紫外線 (H�烙��/UV) 氧化程序於處理含氯離 子或硝酸根離子之廢水時,過氧化氫在紫外光照射下之裂解反應行為。實驗之進行,採用批 次式光反應槽,於實驗室中配製不同濃度之氯離子及硝酸根離子之反應溶液,經調整至所設 定之 pH 值後,注入反應槽中進行反應,並採樣測定不同反應時間之過氧化氫濃度。從實驗 結果顯示得知,當氯離子濃子固定在 282mM 狀態下,過氧化氫之裂解速率在 pH=2 與 pH=3 之間有急遽下降之趨勢,而當 pH ≦ 2 或 pH ≧ 3 時,裂解速率則分別保持不變:而改變 氯離子濃度在 28.2 ∼ 282mM 之間,並分別在中性及酸性條件下, 過氧化氫裂解並無顯著 的變化。 另外,將硝酸根濃度固定在 1mM 狀態下,觀察過氧化氫之裂解速率在 pH=3-4 有 顯著的下降,這和固定氯離子濃度在改變 pH 之實驗, 有類似的現象; 另外,當硝酸根在 0.16 ∼ 1.6mM 之濃度變化時,過氧化氫之裂解速率有隨著濃度增加而稍微減緩之趨勢。 |
英文摘要 | This study describes the decomposition of hydrogen peroxide irradiated by ultraviolet (UV) light in the presence of inorganic ions such as chloride and nitrate. Experiments were conducted under different concentrations of chloride and nitrate ions as well as different pH values by using a batch photoreactor. The reacted samples were taken at different time intervals for the analysis of hyrogen peroxide, As a result, a significant drop of photolysis rate of hydrogen peroxide occurred in the range of pH 2-3 in the presence of chloride ions of 282 mM. Beyond this range, the photolysis rate remained rather unchanged. By changing chloride ion concentration from 28.2 to 282 mM, the decomposition of hydrogen peroxide was observed to be insignificant under neutral and acidic conditions. Similarly, in the presence of nitrate ions of 1 mM, the decomposition of hydrgen peroxide was found most significant within the range of pH 3-4. Additionally, the decomposition rate of hydrogen peroxide decreased slightly with increasing concentation nitrate ion from 0.16 to 1.6 mM. |
本系統中英文摘要資訊取自各篇刊載內容。