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	臭氧氧化水中2,4,6-三氯酚的反应机理研究
	皮运正 ; 王建龙 ; PI Yunzheng ; WANG Jianglong
	2010-06-04 ; 2010-06-04
关键词	2,4,6-三氯酚 臭氧 过氧化氢 羟基自由基 反应途径 2,4,6-trichlorophenol ozone hydrogen peroxide hydroxyl radicals reaction pathway X131.2
其他题名	The pathway of the ozonation of 2,4,6-trichlorophenol in aqueous solution
中文摘要	研究了臭氧氧化对2,4,6-三氯酚的去除效果,以及氧化过程中过氧化氢、氯离子、甲酸和乙二酸的变化情况,探讨了臭氧氧化2,4,6-三氯酚的反应机理和反应途径.实验结果表明,如果溶液中没有自由基清除剂,在臭氧投加量为24mg·L~(-1)时,0·1mmol·L~(-1)的2,4,6-三氯酚在6min内,去除率可达99%.臭氧分子氧化2,4,6-三氯酚的过程中产生过氧化氢,检测到的过氧化氢的最大摩尔浓度为初始2,4,6-三氯酚摩尔浓度的22·5%.中间产物过氧化氢随后和臭氧反应生成大量的羟基自由基,此时2,4,6-三氯酚是被臭氧和羟基自由基联合氧化,生成甲酸和乙二酸.当溶液中含有大量的自由基清除剂时,2,4,6-三氯酚首先被臭氧分子氧化成黄色的氯代对苯醌,然后氧化成甲酸和乙二酸.臭氧氧化2,4,6-三氯酚存在臭氧分子氧化以及O3/OH·联合氧化两种反应途径.; The reaction mechanism and pathway of the ozonation of 2,4,6-trichlorophenol (2,4,6-TCP) in aqueous solution were investigated. The removal efficiency and the variation of H_2O_2, Cl~-, formic acid and oxalic acid were studied during the ozonation process. The results showed that when there was no scavenger, the removal efficiency of (0.1?mmol稬~(-1)) 2,4,6-TCP could reach 99% within 6 min by adding (24?mg稬~(-1)) ozone. The reaction of molecular ozone with 2,4,6-TCP resulted in the formation of H_2O_2. The maximal concentration of H_2O_2 detected during the ozonation could reach 22.5% of the original concentration of 2,4,6-TCP. The reaction of ozone with H_2O_2 resulted in generating a lot of OH� radicals. Therefore, 2,4,6-TCP was destroyed to formic acid and oxalic acid by ozone and OH� radicals together. With the inhibition of OH� radicals, ozone molecule firstly destroyed 2,4,6-TCP to form chlorinated quinone, which was subsequently oxidized to formic acid and oxalic acid. Two reaction pathways of the degradation of 2,4,6-TCP by ozone and O_3/OH� are proposed.; 国家自然科学基金(No.50325824); 中国博士后科学基金~~
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/35919]
专题	清华大学
推荐引用方式 GB/T 7714	皮运正,王建龙,PI Yunzheng,等. 臭氧氧化水中2,4,6-三氯酚的反应机理研究[J],2010, 2010.
APA	皮运正,王建龙,PI Yunzheng,&WANG Jianglong.(2010).臭氧氧化水中2,4,6-三氯酚的反应机理研究..
MLA	皮运正,et al."臭氧氧化水中2,4,6-三氯酚的反应机理研究".(2010).

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