title: Effect of halide ions on the photodegradation of ibuprofen in aqueous environments.
abstract: Typically contained within ambient surface waters and certain industrial wastewaters, are plentiful halide ions, which possess varying degrees of photosensitivity. The effects of halide ions on the photodegradation of ibuprofen (IBP) were investigated under UV irradiation using a 500 W mercury lamp as a light source. Studies of the mechanism of halide ions were inclusive of both their light shielding effects and quenching experiments. The results indicated that chloride ion has a slight inhibition against IBP photodegradation under neutral condition, and significant inhibition is observed with bromide ions and iodide ions. In addition to the observed increased rate of IBP photodegradation in conjunction with elevated pH in solution, the inhibitory effect of halide ions was different. When the pH value of the IBP solution was 5, chloride ions were seen to facilitate the photodegradation of IBP. Halide ions can inhibit IBP photodegradation by means of a light attenuation effect. All of the halide ions significantly facilitated the generation of1O2.
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China. Electronic address: fuhualee@163.com.
authors.forename: Fuhua
authors.initials: F
authors.lastname: Li
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China.
authors.forename: Qingqing
authors.initials: Q
authors.lastname: Kong
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China.
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China. Electronic address: liugg615@163.com.
authors.forename: Guoguang
authors.initials: G
authors.lastname: Liu
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China.
authors.forename: Wenying
authors.initials: W
authors.lastname: Lv
authors.affiliation: School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China.
authors.forename: Kun
authors.initials: K
authors.lastname: Yao
mesh_terms: D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000378:metabolism* / Q000528:radiation effects*; D002712:Chlorides / Q000494:pharmacology*; D007052:Ibuprofen / Q000378:metabolism* / Q000528:radiation effects*; D055668:Photochemical Processes; D010782:Photolysis; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D002712:Chlorides; D014874:Water Pollutants, Chemical; D014867:Water; D007052:Ibuprofen
keywords: Halide ions; Ibuprofen; Light shielding effects; Photodegradation; Singlet oxygen