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 (Na₂S₂O₈) with different activation methods are compared,and the influences of activation temperature,Na₂S₂O₈ dosage,initial pH,reaction time and initial concentration of 2,4-dichlorophenol are investigated systematically.The results show that the activation effect on Na₂S₂O₈ is in the order of thermal activation > alkaline activation > ultrasonic activation > H₂O₂ activation > no activation.Heating up is beneficial to increasing the activation efficiency of Na₂S₂O₈,The best degradation efficiency can be gained by using Na₂S₂O₈ that is activated under 60℃.Almost all of 2,4-dichlorophenol in aqueous solution can be degraded over thermal activated Na₂S₂O₈ in the optimal treatment conditions that the mole ratio of 2,4-dichlorophenol and Na₂S₂O₈ is 1:30,Na₂S₂O₈ 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 Na₂S₂O₈ can apply to treating with 2,4-dichlorophenol-contaminated wastewater.

姜思佳(1997-),女,本科,研究方向为过硫酸盐氧化技术,16512988@qq.com