热活化过硫酸钠氧化降解水中2,4-二氯苯酚的研究

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英文篇名：Degradation of 2,4-dichlorophenol in aqueous solution by thermal activated sodium persulfate 作者：姜思佳 ; 张碧涵 ; 单潇清 ; 刘钰琪 ; 高畅 ; 肖鹏飞 英文作者：JIANG Si-jia;ZHANG Bi-han;SHAN Xiao-qing;LIU Yu-qi;GAO Chang;XIAO Peng-fei;School of Forestry,Northeast Forestry University; 关键词：2 ; 4-二氯苯酚 ; 热活化 ; 过硫酸盐 ; 氧化降解 ; 影响因素 英文关键词：2,4-dichlorophenol;;thermal activation;;persulfate;;oxidative degradation;;influence factors 中文刊名：现代化工 英文刊名：Modern Chemical Industry 机构：东北林业大学林学院; 出版日期：2019-02-25 10:15 出版单位：现代化工 年：2019 期：04 基金：国家自然科学基金项目(41201307);; 中央高校基本科研业务费专项资金项目(2572017CA08);; 黑龙江省大学生创新创业训练计划项目(201710225027) 语种：中文; 页：100-104 页数：5 CN：11-2172/TQ ISSN：0253-4320 分类号：X703

摘要

以水中2,4-二氯苯酚为目标污染物,比较了不同活化方式下过硫酸钠对2,4-二氯苯酚的降解去除效果以及热活化过硫酸钠降解2,4-二氯苯酚的影响因素。结果表明,过硫酸钠的活化效果依次为:热活化>碱活化>超声波活化>过氧化氢活化>无活化。升温有利于提升过硫酸钠的活化效率,60℃时活化过硫酸钠的降解效果可达到最佳。热活化过硫酸钠降解的适宜条件为:2,4-二氯苯酚与过硫酸钠摩尔比为1∶30、过硫酸钠分3次等量添加、pH为11～12、反应时间200 min,该条件下水中初始质量浓度为50 mg/L及以下的2,4-二氯苯酚几乎完全降解去除。研究结果表明,热活化过硫酸盐氧化法能高效去除水中的氯苯酚类污染物。
        The degradation efficiencies of 2,4-dichlorophenol in aqueous solution by sodium persulfate(Na_2S_2O_8)with different activation methods are compared,and the influences of activation temperature,Na_2S_2O_8 dosage,initial pH,reaction time and initial concentration of 2,4-dichlorophenol are investigated systematically.The results show that the activation effect on Na_2S_2O_8 is in the order of thermal activation > alkaline activation > ultrasonic activation > H_2O_2 activation>no activation.Heating up is beneficial to increasing the activation efficiency of Na_2S_2O_8,The best degradation efficiency can be gained by using Na_2S_2O_8 that is activated under 60℃.Almost all of 2,4-dichlorophenol in aqueous solution can be degraded over thermal activated Na_2S_2O_8 in the optimal treatment conditions that the mole ratio of 2,4-dichlorophenol and Na_2S_2O_8 is 1 ∶30,Na_2S_2O_8 is added by three times,pH is in the range of 11-12,reaction time is 40 min and the initial concentration of 2,4-dichlorophenol is less than 50 mg·L~(-1) in aqueous solution.The results confirm that the oxidation technology using thermal activated Na_2S_2O_8 can apply to treating with 2,4-dichlorophenol-contaminated wastewater.

引文

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