Fe2＋活化过硫酸钾降解2，4，6－三氯苯酚的研究

摘要

To investigate the degradation of 2,4,6-trichlorophenol in water , the activating agent of Fe 2+and the oxidant of K2S2O8 were used.The effects of the concentrations of K2S2O8 and FeSO4 on the degradation of 2,4,6-trichlorophenol were studied .The optimal operating conditions were obtained as follows: 3.75 mmol/L of K2 S2 O8 and 1.25 mmol/L of FeSO4, namely, the optimal molar ratio of oxidant K2S2O8 to activating agent Fe2+was 75:25.Under these conditions, the degradation rate of 2,4,6-trichlorophenol was 91%.The degradation kinetics of 2,4,6-trichloro-phenol showed that the reaction included an initial fast stage and a final slow stage .The reaction was very fast at the first stage , and became slow at the second stage which followed a first-order kinetic.%以Fe2＋为活化剂， K2 S2 O8为氧化剂，对水中2，4，6－三氯苯酚进行降解处理。首先研究K2 S2 O8浓度和FeSO4浓度等因素对2，4，6－三氯苯酚降解的影响，发现在K2 S2 O8浓度为3．75 mmol／L和FeSO4浓度为1．25 mmol／L，即K2 S2 O8／Fe2＋＝75砄25的条件下，2，4，6－三氯苯酚的降解率达到最大值，为91％。动力学研究表明， Fe2＋活化K2 S2 O8降解2，4，6－三氯苯酚的过程可分为两个阶段，其中第一阶段反应速度较快，第二阶段为慢速反应，并且第二阶段符合一级反应动力学规律。