title: UV-H2O2 degradation of methyl orange catalysed by H3PW12O40/activated clay.
abstract: A catalyst consisting of phosphotungstic acid (H3PW12O40) combined with activated clay was prepared by the impregnation method, and an experiment was carried out to evaluate the catalytic activity of the H3PW12O40/activated clay for the degradation of methyl orange (MO) in the UV-H2O2 process. The degradation ratio of MO can be affected by H2O2 concentration, reaction time, catalyst dosage, pH and temperature. The reaction temperature should be controlled at less than 70 degrees C, and the catalyst has a wide applicable pH range in the UV-H2O2 process. Hydroxyl radicals were generated in the UV-H2O2 system under the action of H3PW12O40/activated clay, and MO was degraded by hydroxyl radicals. Compared with traditional catalysts used in UV-H2O2 systems, H3PW12O40/activated clay has certain advantages for its practical application.
authors.affiliation: Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guangxi University, Nanning Guangxi 530004, China. gtwei@gxu.edu.cn
authors.forename: Guangtao
authors.initials: G
authors.lastname: Wei
authors.forename: Linye
authors.initials: L
authors.lastname: Zhang
authors.forename: Tengyou
authors.initials: T
authors.lastname: Wei
authors.forename: Qiyu
authors.initials: Q
authors.lastname: Luo
authors.forename: Zhangfa
authors.initials: Z
authors.lastname: Tong
mesh_terms: D000538:Aluminum Silicates; D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D000077215:Clay; D004396:Coloring Agents / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical; D010772:Phosphotungstic Acid; D059027:Recycling; D013696:Temperature; D013997:Time Factors; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000538:Aluminum Silicates; D001391:Azo Compounds; D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D010772:Phosphotungstic Acid; D017665:Hydroxyl Radical; C100258:methyl orange; D006861:Hydrogen Peroxide; D000077215:Clay