title: Catalytic ozonation of dimethyl phthalate using Fe3O4/multi-wall carbon nanotubes.
abstract: In this paper, Fe3O4/multi-wall carbon nanotubes composites were prepared, characterized and used as a catalyst for enhancing the ozonation of dimethyl phthalate (DMP) in aqueous solution. The experimental results showed that DMP degradation and mineralization increased by 26% and 20%, respectively, in catalytic ozonation compared with single ozonation, and more H2O2and organic acids were produced during catalytic ozonation process than single ozonation. The effect of pH, ozone concentration and catalyst dosage on DMP degradation was determined. The addition of tert-butanol and phosphates showed a negative effect on DMP degradation, suggesting that the acidic sites on the catalyst is favorable to ozone decomposition to produce hydroxyl radicals. The possible mechanism for catalytic ozonation of DMP was tentatively proposed. The adsorption of ozone and organics onto the surface of catalyst could improve the DMP degradation.
authors.affiliation: a School of Water Resources and Environment , China University of Geosciences , Beijing , People's Republic of China.|b Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET , Tsinghua University , Beijing , People's Republic of China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Bai
authors.affiliation: a School of Water Resources and Environment , China University of Geosciences , Beijing , People's Republic of China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.affiliation: b Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET , Tsinghua University , Beijing , People's Republic of China.|c Beijing Key Laboratory of Radioactive Waste Treatment, INET , Tsinghua University , Beijing , People's Republic of China.
authors.forename: Jianlong
authors.initials: J
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D006861:Hydrogen Peroxide; D037742:Nanotubes, Carbon; D010126:Ozone; D014874:Water Pollutants, Chemical
chemical_list: D037742:Nanotubes, Carbon; D014874:Water Pollutants, Chemical; D010126:Ozone; D006861:Hydrogen Peroxide
keywords: Dimethyl phthalate; catalytic ozonation; degradation; magnetic carbon nanotubes; plasticizer