Preparation of Fe and N co-doped activated carbon mixed matrix membranes for water treatment
The traditional membrane separation process suffers from the contradiction between membrane selectivity and permeability,which is hard to remove pollutants smaller than membrane pores.Fe and N co-doped activated carbons(FeNCs)were filled into poly(vinylidene fluoride)(PVDF)matrix to obtain mixed matrix membranes(FeNCs@PVDF)with peroxymonosulfate(PMS)activation ability.The physical and chemical properties of membranes were tested by scanning electron microscopy,energy dispersive spectroscopy,X ray diffraction and Raman spectroscopy.Employing phenol as the target pollutant,the water treatment performance of FeNCs@PVDF under PMS activation assistance was evaluated.Results showed the FeNCs@PVDF integrated with PMS activation exhibited effective phenol removal,and its performance was improved with increased filling of FeNCs.The phenol removal by FeNCs@PVDF with 50％FeNCs was 4.8 and 3.6 times higher than that of PMS oxidation alone and membrane filtration alone,respectively.The FeNCs@PVDF can maintain high performance in a wide pH range of 3-12.
Fe and N co-doped activated carbonmixed matrix membraneperoxymonosulfate activation
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