title: [Degradation of Organic Sunscreens 2-hydroxy-4-methoxybenzophenone by UV/ H2O2 Process: Kinetics and Factors].
abstract: Organic sunscreens continue to enter the environment through people's daily consumption, and become a kind of emerging contaminants. The photochemical degradation of benzophenone-3 (BP-3) in water by UV/H2O2 process was investigated. Several factors, including the initial BP-3 concentration, H2O2 concentration, UV light intensity, coexisting cations and anions, humic acid and tert-butyl alcohol, were also discussed. The results showed that BP-3 degradation rate constant decreased with increasing initial BP-3 concentration, while increased with increasing H2O2 dosage and UV intensity. Coexisting anions could reduce the degradation rate, while coexisting ferric ions could stimulate the production of OH through Fenton-like reaction, further significantly accelerated BP-3 degradation process. The BP-3 degradation would be inhibited by humic acid or tert-butyl alcohol. The electrical energy per order (E(Eo)) values were also calculated to evaluate the cost of BP-3 degradation by UV/H2O2 process. The addition of ferric ions significantly reduced the value of E(Eo). The investigation of processing parameter could provide a reference for the practical engineering applications of benzophenone compounds removal by UV/H2O2 process.
authors.forename: Xin-xin
authors.initials: XX
authors.lastname: Feng
authors.forename: Er-deng
authors.initials: ED
authors.lastname: Du
authors.forename: Ying-qing
authors.initials: YQ
authors.lastname: Guo
authors.forename: Hua-jie
authors.initials: HJ
authors.lastname: Li
authors.forename: Xiang
authors.initials: X
authors.lastname: Liu
authors.forename: Fang
authors.initials: F
authors.lastname: Zhou
mesh_terms: D001577:Benzophenones / Q000737:chemistry*; D006812:Humic Substances; D006861:Hydrogen Peroxide; D007501:Iron; D007700:Kinetics; D008027:Light; D013473:Sunscreening Agents / Q000737:chemistry*; D014466:Ultraviolet Rays; D014867:Water; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D001577:Benzophenones; D006812:Humic Substances; D013473:Sunscreening Agents; D014874:Water Pollutants, Chemical; D014867:Water; C047723:benzophenone; C005290:oxybenzone; D006861:Hydrogen Peroxide; D007501:Iron