作　　者： ; ; ; ; ; ; ; (范斯娜）; (纪夏玲）;

机构地区： 广东工业大学环境科学与工程学院

出　　处： 《环境工程学报》 2015年第6期2767-2770,共4页

摘　　要： 在不同p H值、Fe2+浓度和过硫酸氢钾复合盐(PMS)浓度下,探究降解萘普生(NPX)的最佳条件,并通过分批投加Fe2+和改变投加顺序的方式,提高降解NPX的效率。结果表明,NPX在p H=3的条件下,降解效果最好;Fe2+浓度改变时,PMS/Fe2+/NPX=1/0.75/1条件下,NPX去除率最高;分批投加Fe2+和先投加Fe2+均可大幅提高NPX去除率。缓慢少量的产生硫酸根自由基(SO·-4)更利于处理有机物,Fe2+的浓度则在产生自由基方面起着重要作用。 Experiments were conducted to determine the optimal conditions degrading NPX at different p H,concentrations of Fe2 +and PMS. The sequential addition of Fe2 +and changing the order of Fe2 +and PMS addition resulted in an improvement in NPX removal. Results show that the highest NPX decomposition occurred at p H 3; the degradation of NPX is better at the molar ratio of PMS / Fe2 +/ NPX = 1 /0. 75 /1 when the concentration of Fe2 +is changed; sequential addition of Fe2 +and adding Fe2 +at first result in an efficient NPX removal. It appears that a slow and steady production of sulfate radicals is desirable of degrading organic compounds and the concentration of Fe2 +plays an important role in formation of free radicals.

关 键 词： 萘普生 硫酸根自由基 过硫酸氢钾复合盐 亚铁离子

领　　域： [环境科学与工程]