Photochemical decomposition of perfluorodecanoic acid in aqueous solution with VUV light irradiation.
J Hazard Mater
; 181(1-3): 187-92, 2010 Sep 15.
Article
em En
| MEDLINE
| ID: mdl-20557997
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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Raios Ultravioleta
/
Ácidos Decanoicos
/
Processos Fotoquímicos
/
Fluorocarbonos
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article