title: Degradation of organic pollutants by an integrated photo-Fenton-like catalysis/immersed membrane separation system.
abstract: To resolve the continuously reuse problem of fine catalysts, a new reactor was investigated by coupling the heterogeneous photo-Fenton-like oxidation with membrane separation. The reactor consisted of a Xe lamp, a submerged membrane module and FeVO(4) as catalyst with high activity. Results showed that the catalyst was successfully left in the reactor. It was proved by the kinetics study of membrane fouling that the avoidless membrane fouling was brought mainly by surface cake, at catalyst concentration of 4 g/L, it accounted for more than 90% of the total resistance. The kinetics study of catalytic degradation of AO II under sub-critical flux showed the optimal concentration of catalyst was 0.5 g/L and under this concentration the membrane fouling was negligible. For a residence time of 60 min, the degradation efficiency of AO II reached more than 99% and the chemical oxygen demand (COD) removal efficiency was as high as 91%. The model of continuous stirred tank reactor could predict well for the degradation which was consistent with hydrodynamics study. Moreover, the PFM reactor shows a long-term behavior with both membrane and catalyst in it and merits consideration for scaled-up trials.
authors.affiliation: School of Environment, Guang Xi University, Nanning 530004, PR China. jiedeng05@sina.com
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ya
authors.initials: Y
authors.lastname: Xiong
authors.forename: Yankui
authors.initials: Y
authors.lastname: Tang
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Wang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D006861:Hydrogen Peroxide / Q000737:chemistry*; D058085:Iron Compounds / Q000737:chemistry*; D008027:Light; D008567:Membranes, Artificial; D009281:Naphthalenes / Q000737:chemistry* / Q000528:radiation effects; D016877:Oxidants / Q000737:chemistry*; D010782:Photolysis; D059027:Recycling; D014638:Vanadates / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects; D018508:Water Purification
chemical_list: C456587:Acid Orange II; D001391:Azo Compounds; D004396:Coloring Agents; D058085:Iron Compounds; D008567:Membranes, Artificial; D009281:Naphthalenes; D016877:Oxidants; D014874:Water Pollutants, Chemical; D014638:Vanadates; D006861:Hydrogen Peroxide