title: Heterogeneous catalytic ozonation of dibutyl phthalate in aqueous solution in the presence of iron-loaded activated carbon.
abstract: Iron-loaded activated carbon was prepared and used as catalyst in heterogeneous catalytic ozonation of dibutyl phthalate (DBP). The catalytic activity of iron-loaded activated carbon was investigated under various conditions and the mechanisms of DBP removal were deduced. Characterization of catalyst indicated that the iron loaded on activated carbon was mainly in the form of goethite, which reduced its surface area, pore volume and pore diameter. The presence of metals on activated carbon positively contributed to its catalytic activity in ozonation of DBP. Iron loading content of 15% and initial water pH of 8 achieved highest DBP removal among all the tried conditions. Catalyst dosage of 10 mg L(-1) led to approximately 25% of increase in DBP (initial concentration 2 mg L(-1)) removal in 60 min as compared with ozone alone, and when catalyst dosage increased to 100 mg L(-1), the DBP removal was further improved by 46%. Based on a comparison of reaction rates for direct and indirect transformation of DBP, the increased removal of DBP in this study likely occurred via transformation of ozone into hydroxyl radicals on the catalyst surface.
authors.affiliation: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Yuanxing
authors.initials: Y
authors.lastname: Huang
authors.affiliation: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Chenchen
authors.initials: C
authors.lastname: Cui
authors.affiliation: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Daofang
authors.initials: D
authors.lastname: Zhang
authors.affiliation: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address: liliang@usst.edu.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Ding
authors.initials: D
authors.lastname: Pan
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D003993:Dibutyl Phthalate / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry*; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification
chemical_list: D012996:Solutions; D014874:Water Pollutants, Chemical; D003993:Dibutyl Phthalate; D010126:Ozone; D002244:Carbon; D007501:Iron
keywords: Degradation mechanism; Dibutyl phthalate; Heterogeneous catalytic ozonation; Iron-loaded activated carbon