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使用合成的树脂纳米零价铁(NZVI-resin)作为铁源,采用活化过硫酸钠(PDS)的方式产生具有强氧化性的硫酸根自由基,以偶氮染料刚果红(CR)为目标污染物,考察了硫酸根自由基对甲基橙的氧化降解行为.系统研究了温度、pH值、NZVI-resin加入量及过硫酸钠的浓度等因素对过硫酸钠氧化降解刚果红效率的影响,探讨了其降解动力学.结果表明:在pH=3.0、纳米零价铁用量为0.067 g·L-1、Na2S2O8的投加量为0.67 g·L-1的条件下,初始浓度为20 mg·L-1的刚果红溶液的降解率为84.59%;该降解反应符合准一级反应动力学方程.“,”Oxidative degradation of congo red(CR)in aqueous solution by resin of zero valent iron nanoparticles(NZVI,nanoscale zero-valentiron)and activated sodium peroxydisulfate(PDS)was investigated. The degradation process was based on generation of sulfate radicalsas powerful oxidizing species. The effects of temperature,pH value,the dosages of NZVI-resin,the concentration of sodium persulfate on congo red were examined in batch experiments. In addition,its degradation kinetics was discussed. The results showed that under the condition of pH = 3,Fe0 dosage 0.067 g·L-1,Na2S2O8 dosage 0.67 g·L-1,the degradation efficiency of a initial CR concentration 20 mg·L-1 could reach 84.59%,and the degradation of congo red followed the first order kinetics.