氯代苯甲醚类致嗅物的生成机理及影响因素

发布时间：2018-10-10 16:20

【摘要】：以苯甲醚作为前体物,探讨氯代苯甲醚的生成途径机理以及在氯消毒过程中pH值、氯投加量(氯的质量浓度)、苯甲醚初始质量浓度、温度和金属离子对生成的影响.结果表明,pH值对反应起决定性的作用,苯甲醚只能在酸性和弱酸性条件下才能发生氯代反应.氯投加量、苯甲醚初始质量浓度、温度的升高不仅加快了苯甲醚的反应速率,也增大了氯代苯甲醚的生成量.金属离子Fe3+,Al 3+对反应有催化作用,Al 3+的促进效果最好,反应速率提高约25%,而Mn2+,Zn2+对反应没有促进作用.氯投加量、苯甲醚初始质量浓度、温度3个因素的影响对反应体系的影响强度不同,分别和生成量呈线性相关.氯代苯甲醚的生成量和3个影响变量之间符合多元线性相关,氯投加量和苯甲醚初始质量浓度对氯代苯甲醚的生成量影响显著,二者的显著性小于0.05,温度对反应的显著性不明显.三者对反应的影响强度由大到小为氯投加量、苯甲醚初始质量浓度、温度.
[Abstract]:The formation pathway mechanism of chlorobenzene methyl ether and the effects of pH value, chlorine dosage (mass concentration of chlorine), initial mass concentration of phenyl methyl ether, temperature and metal ions on the formation of chlorobenzene methyl ether during chlorine disinfection were discussed. The results showed that the pH value played a decisive role in the reaction, and the chlorination reaction of phenylene methyl ether could only take place in acidic and weak acidic conditions. The increase of chlorine dosage, initial mass concentration and temperature not only accelerates the reaction rate, but also increases the amount of chlorobenzene methyl ether. Metal ions Fe3 and Al _ 3 can catalyze the reaction, Al _ 3 is the best, the reaction rate is increased by about 25%, but Mn2 and Zn2 have no effect on the reaction. The effects of chlorine dosage, initial concentration of phenylene ether and temperature on the reaction strength were different, and there was a linear correlation between these factors and the amount of product. There was a linear correlation between the amount of chlorobenzene methyl ether and the three influencing variables, and the amount of chlorine added and the initial mass concentration of phenyl methyl ether had a significant effect on the amount of chlorobenzene methyl ether. The significance of the two was less than 0.05 and the effect of temperature on the reaction was not obvious. The effect of the three factors on the reaction strength is from large to small for the dosage of chlorine, the initial mass concentration of phenylene ether and the temperature.
【作者单位】：浙江大学建筑工程学院;
【基金】：长江水环境教育部重点实验室开放课题(YRWEF201302) 国家自然科学基金(51208456) “十二五”国家科技支撑计划(2012XZ07403-003) 浙江工业大学“重中之重学科”开放基金(20130307)
【分类号】：R123

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