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頁籤選單縮合
題名 | 臭氧處理甲醛廢液之研究=The Study of Treating the Formaldehyde Aqueous Waste by Ozone |
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作者 | 汪玉銘; Uang, Yuh-ming; |
期刊 | 吳鳳學報 |
出版日期 | 19960500 |
卷期 | 4 1996.05[民85.05] |
頁次 | 頁156-162 |
分類號 | 445.463 |
語文 | chi |
關鍵詞 | 生物毒性; 需氧量; COD值; 自由基鍊鎖反應; Biological toxicity; Oxygen demand; COD; Radical chain reaction; |
中文摘要 | 臭氧以批式法處理甲醛廢液能成功的氧化及分解廢液中之甲醛污染物,如此:降 低了廢液之生物毒性及需氧量, 經實驗後發現系統之 pH 值及 COD 值皆隨處理時間之增加 而有遞減之趨勢,此現象說明了甲醛之分解反應包含了兩個步驟:即甲醛先被氧化成甲酸; 緊接著就是甲酸再被氧化成二氧化碳及水,又由實驗得知:提高系統之 pH 值可加速甲醛之 氧化及分解反應,此乃由於氫氧離子於溶液中可迅速的與臭氧反應生成 OH 及 OH �祕菪扆� ,進而與甲醛進行自由基鍊鎖反應,最後;本文提出臭氧與甲醛於水相中之可能反應機構。 |
英文摘要 | Applying ozone to treat the fromaldehyde aqueous waste by batch method can successfully oxide and decompose the formaldehyde contaminant in aqueous waste, thus; decreasing the biological toxicity and oxygen demand. After investigating found that the value of pH and COD in system decreased with the increase of processing time. This phenomena explains that the decomposition of formaldehyde including two steps: the oxidation of formaldehyde to formic acid followed by the oxidation of formic acid to carbon dioxide and water. Datas show that increasing the pH of system can accelerate the oxidation of formaldehyde, the reason was due to that the hydrogen oxide ion can rapidly react with ozone in aqueous solution to produce OH ��. and OH. radicls, then; reacting with formaldehyde by radical chain reaction. At last, this paper proposed the possible mechanism of ozone reacting with formaldehyde in the presence of water. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。