Photochemical decomposition of perfluorodecanoic acid in aqueous solution with VUV light irradiation

被引：43
作者：
Wang, B. B. [1 ]
Cao, M. H. [1 ]
Tan, Z. J. [1 ]
Wang, L. L. [1 ]
Yuan, S. H. [1 ]
Chen, J. [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Coll Environm Sci & Engn, Environm Sci Res Inst, Wuhan 430074, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 181卷 / 1-3期
关键词：
Photochemical decomposition; Perfluorodecanoic acid; VUV light; Defluorination; PERSISTENT PERFLUOROOCTANOIC ACID; PERFLUOROCARBOXYLIC ACIDS; EFFICIENT DECOMPOSITION; PHOTOCATALYTIC TRANSFORMATIONS; ALKYL SURFACTANTS; 254; NM; WATER; DEGRADATION; ELECTRON; PHOTODEGRADATION;
D O I：
10.1016/j.jhazmat.2010.04.115
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The photochemical decomposition of perfluorodecanoic acid (PFDeA) in water in the presence of persulfate ion (S2O82-) and sulfur ion (S2-) was investigated under vacuum ultraviolet (VUV) light irradiation. PFDeA was decomposed under VUV light irradiation. With the addition of S2O82- or S2-, the photodecomposition and defluorination of PFDeA were enhanced significantly. Sulfate radical anion (SO4 center dot-) generated from photolysis of S2O82- initiated PFDeA oxidation. While the S2- ion, acting as a (OH)-O-center dot scavenger, enhanced the role of reduction pathway induced by aqueous electrons (e -). The shorter-chain perfluorocarboxylic acids (PFCAs), formed in a stepwise manner from longer-chain PFCAs, were identified as products by HPLC/MS. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：187 / 192
页数：6
相关论文
共 29 条
[1]   Photocatalytic transformations of chlorinated methanes in the presence of electron and hole scavengers [J].
Calza, P ;
Minero, C ;
Pelizzetti, E .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1997, 93 (21) :3765-3771
[2]   Photocatalytic transformations of CCl3Br, CBr3FCHCl2Br and CH2BrCl in aerobic and anaerobic conditions [J].
Calza, P ;
Minero, C ;
Hiskia, A ;
Papaconstantinou, E ;
Pelizzetti, E .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 29 (01) :23-34
[3]   Photodegradation of perfluorooctanoic acid in water under irradiation of 254 nm and 185 nm light by use of persulfate [J].
Chen, J. ;
Zhang, P. .
WATER SCIENCE AND TECHNOLOGY, 2006, 54 (11-12) :317-325
[4]   Photocatalytic decomposition of environmentally persistent perfluorooctanoic acid [J].
Chen, J ;
Zhang, PY ;
Zhang, L .
CHEMISTRY LETTERS, 2006, 35 (02) :230-231
[5]   Photodegradation of perfluorooctanoic acid by 185 nm vacuum ultraviolet light [J].
Chen Jing ;
Zhang Peng-yi ;
Liu Jian .
JOURNAL OF ENVIRONMENTAL SCIENCES, 2007, 19 (04) :387-390
[6]   PHOTOREDUCTIVE MECHANISM OF CCL4 DEGRADATION ON TIO2 PARTICLES AND EFFECTS OF ELECTRON-DONORS [J].
CHOI, WY ;
HOFFMANN, MR .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1995, 29 (06) :1646-1654
[7]   Light-induced degradation of perfluorocarboxylic acids in the presence of titanium dioxide [J].
Dillert, Ralf ;
Bahnemann, Detlef ;
Hidaka, Hisao .
CHEMOSPHERE, 2007, 67 (04) :785-792
[8]  
HALERAIA VO, 2008, ENVIRON SCI TECHNOL, V42, P3260
[9]   Efficient decomposition of environmentally persistent perfluorooctanesulfonate and related fluorochemicals using zerovalent iron in subcritical water [J].
Hori, H ;
Nagaoka, Y ;
Yamamoto, A ;
Sano, T ;
Yamashita, N ;
Taniyasu, S ;
Kutsuna, S ;
Osaka, I ;
Arakawa, R .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (03) :1049-1054
[10]   Efficient decomposition of environmentally persistent perfluorocarboxylic acids by use of persulfate as a photochemical oxidant [J].
Hori, H ;
Yamamoto, A ;
Hayakawa, E ;
Taniyasu, S ;
Yamashita, N ;
Kutsuna, S .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (07) :2383-2388
123