In the paper we studied nano -iron/hydrogen peroxide system with the degradation of 2, 4, 6 -trichlorophenol. With FeSO4 · 7H2O and KBH4 as the precursor, using liquid - phase chemical reduction method we obtained nano - iron, and the obtained particles were characterized by scanning electron microscope ( SEM) . By choosing 2, 4, 6 - trichlorophenol as the target pollutant, the influences of pH, the concentration of H2O2 , temperature, ionic strength and the amount of nano - iron on the degradation of 2, 4 , 6- trichlorophenol were investigated. The result showed that in the optimal experimental conditions, within 60 min more than 95％ of 2, 4, 6 - trichlorophenol can be degraded. Initial pH was proven to have significant effect on the degradation and lower pH brought faster degradation rate. When initial pH was 3 , the effect was the best. From this experiment, we provided an effective method to degrade 2, 4 , 6 - trichlorophenol.%研究了纳米铁/H2O2体系对三氯酚的降解作用,以FeSO4·7H2O与KBH4为前驱物,采用液相化学还原法制得纳米铁,并采用扫面电子显微镜(SEM)对合成的纳米铁进行表征.以三氯酚作为目标污染物,考察了纳米铁浓度,pH,H2O2浓度,温度,离子强度等对三氯酚降解率的影响.结果表明,在优化的实验条件下,纳米铁在20 min内可以降解超过95%的三氯酚;反应体系的初始pH对三氯酚降解率的影响较大,酸性条件下降解效果较好,pH值为3时效果最佳,为环境中三氯酚的降解提供了一种有效的方法.
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