纳米四氧化三铁多相催化过硫酸钾降解水中苯胺

Degradation of Aniline in Water by Potassium Disulfate Activated by Magnetite Nanoparticles in Multiphase

高级氧化技术是降解水中有机物极具应用前景的技术,其中过硫酸盐法是该技术近年来研究的热点。采用纳米四氧化三铁催化剂催化过硫酸盐降解水中苯胺,通过试验探讨了pH值、纳米四氧化三铁投加量、过硫酸盐浓度、反应时间、反应温度等因素对降解苯胺的影响,并探讨了苯胺降解的机理。结果表明:在pH值为8、反应温度为30℃、过硫酸盐浓度为8 mmol/L的条件下,用1.50 g/L纳米四氧化三铁催化降解20 mg/L的苯胺模拟废水,苯胺去除率可达86%以上,说明纳米四氧化三铁/过硫酸盐体系能有效地降解苯胺。

Advanced Oxidation Technology is a promising technology for degrading organic matter in water,and the persulfate method is a hot spot in this technology.In this paper,the magnetite nanoparticles catalyst was used to activate persulfate to degrade aniline in water.The effects of pH value,the doses of magnetite nanoparticles,the concentration of potassium persulfate,reaction time,reaction temperature and degree on the degradation of aniline were discussed,and the degradation mechanism of aniline was discussed.The results showes that the simulated wastewater containing aniline(20 mg/L)has a removal rate of over 86%by persulfate(8 mmol/L)activation by magnetite nanoparticles(1.50 g/L)at pH 8 and 30℃.This indicates that the system combined nano-ferric oxide with persulfate can effectively degrade aniline.