title: Photochemical decomposition of perfluorodecanoic acid in aqueous solution with VUV light irradiation.
abstract: The photochemical decomposition of perfluorodecanoic acid (PFDeA) in water in the presence of persulfate ion (S(2)O(8)(2-)) and sulfur ion (S(2-)) was investigated under vacuum ultraviolet (VUV) light irradiation. PFDeA was decomposed under VUV light irradiation. With the addition of S(2)O(8)(2-) or S(2-), the photo-decomposition and defluorination of PFDeA were enhanced significantly. Sulfate radical anion (SO(4)(*-)) generated from photolysis of S(2)O(8)(2-) initiated PFDeA oxidation. While the S(2-) ion, acting as a *OH scavenger, enhanced the role of reduction pathway induced by aqueous electrons (e(aq)(-)). The shorter-chain perfluorocarboxylic acids (PFCAs), formed in a stepwise manner from longer-chain PFCAs, were identified as products by HPLC/MS.
authors.affiliation: Environmental Science Research Institution, College of Environment Science and Engineering, Huazhong University of Science and Technology, Wuhan, PR China.
authors.forename: B B
authors.initials: BB
authors.lastname: Wang
authors.forename: M H
authors.initials: MH
authors.lastname: Cao
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Tan
authors.forename: L L
authors.initials: LL
authors.lastname: Wang
authors.forename: S H
authors.initials: SH
authors.lastname: Yuan
authors.forename: J
authors.initials: J
authors.lastname: Chen
mesh_terms: D002264:Carboxylic Acids; D003652:Decanoic Acids / Q000737:chemistry / Q000528:radiation effects*; D005466:Fluorocarbons / Q000737:chemistry / Q000528:radiation effects*; D055668:Photochemical Processes; D010782:Photolysis; D012996:Solutions; D013431:Sulfates / Q000737:chemistry; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects
chemical_list: D002264:Carboxylic Acids; D003652:Decanoic Acids; D005466:Fluorocarbons; D012996:Solutions; D013431:Sulfates; D014874:Water Pollutants, Chemical; C036567:perfluorodecanoic acid