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題名 | 光化學氧化方法處理二氯乙烷廢水之探討 |
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作者 | 李元陞; | 書刊名 | 宜蘭農工學報 |
卷期 | 8 1994.06[民83.06] |
頁次 | 頁75-87 |
分類號 | 445.2593 |
關鍵詞 | 光化學氧化; 臭氧; 雙氧水; 紫外線幅射; Photolytic oxidation; Ozone; Hydrogen peroxide; Uv radiation; |
語文 | 中文(Chinese) |
中文摘要 | 近幾年來,愈來愈多的高濃度有機化學物質從工廠中排放出來,針對這些很難用 傳統廢水處理方法處理的高濃度有機污染物,用紫外線幅射中加入臭氧或雙氧水當作催化劑 的光化學氧化方法,經證實是一種良好的方法,能在短時間內分解這些有機物。將一定濃度 的二氯乙烷( 1,2-dichloroethane )廢水溶液放入容積約 100 公升的光化學化應器中, 再以七種不同的條件來處理,以得知其分解效率。這七種方法分別為:氮氣脫附,紫外線加 氮氣脫附,紫外線加氧氣,臭氧處理,紫外線加臭氧,雙氧水及雙氧水加紫外線幅射。由實 驗得知,以雙氧水加紫外線幅射具有最高的分解效率, 能在 12 分鐘中內分解 80% 的二氯 乙烷。這歸因於經由高壓汞孤燈所產生的紫外線幅射能有效迅速的分解雙氧水成氫氧自由基 以分解二氯乙烷。在以連續性雙氧水加紫外線幅射方式處理 75.75ppm 的二氯乙烷廢液時, 反應於 15 分鐘後達到穩定狀態,流出濃度為 29ppm。這也證實此種方法可被實際的應用於 一般的工業廢水處理程序中。 |
英文摘要 | In recent years more and more high concentration of toxic organic chemicals are drained from industrial processes. The photolytic ozonation or the photolytic hydrogen peroxide oxidation method has been demonstrated that it's a good method to decompose those high concentration toxic chemicals which hard to treat them by the conventional treatment method in a short time. A certain concentration of 1,2-dichloroethane waste water was conducted in a photoreactor with 100 liter capacity. In order to get the decomposition efficiency, seven different treatment conditions had been done, nitrogen stripping, uv radiation with nitrogen stripping, uv radiation with oxygen, ozone alone, uv radiation with oxygen, ozone alone, uv radiation with ozone, hydrogen peroxide alone and uv radiation with hydrogen peroxide. Hydrogen peroxide can be decomposed to hydroxyl radicals immediately under uv radiation and oxidize 1,2-dichloroethane. It is show that the uv radiation with hydrogen peroxide has the highest decomposition efficiency which 80% of 1,2-dichloroethane is decomposed within 12 minutes. It reaches steady state in 15 minutes with 29 ppm outlet concentration of 1,2-dichloroethane by using a continuous uv radiation with hydrogen peroxide treatment process to treat 75.7 ppm conentration of 1.2-dichloroethane. This also proves that the photolytic oxidation methods can be used in industrials practically. |
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