纳米铁催化过氧化氢降解2,4,6-三氯酚的研究

The study on hydrogen peroxide catalyzed by nano-iron with the degradation of 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.

In the pap trichlorophenol. With er we stu FeSO4 ~ method we obtained nano - iro scope （SEM）. By choosing 2, died nano -iron/hydrogen peroxide system with the degradation of 2, 4, 6 - 7H2O and KBH4 as the precursor, using liquid -phase chemical reduction n, and the obtained particles were characterized by scanning electron micro- 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.