An appraisal on the degradation of paracetamol by TiO2/UV system in aqueous medium.: Product identification by gas chromatography-mass spectrometry (GC-MS)

被引：0

作者：

Dalmazio, Ilza ^{[1
]}

Alves, Tania M. A. ^{[2
]}

Augusti, Rodinei ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Quim, BR-31270901 Belo Horizonte, MG, Brazil

[2] Fundacao Oswaldo Cruz, Ctr Pesquisas Rene Rachou, BR-31270901 Belo Horizonte, MG, Brazil

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2008年 / 19卷 / 01期

关键词：

paracetamol; advanced oxidation process; GC-MS;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The advanced oxidation of paracetamol (1) promoted by TiO2/UV system in aqueous medium was investigated. Continuous monitoring by several techniques, such as UV-Vis spectroscopy, HPLC (high performance liquid chromatography), TOC (total organic carbon), and ESI-MS (electrospray ionization mass spectrometry), revealed that whereas the removal of paracetamol was highly efficient under these conditions, its mineralization was not likewise accomplished. GC-MS (gas chromatography-mass spectrometry) analysis showed that hydroquinone, aliphatic carboxylic acids, monohydroxy and dihydroxy paracetamol were the main products formed as a result of such degradation process. Based on these results, a reaction route for the degradation of paracetamol induced by the TiO2/UV system was suggested. Fragmentation pathways, as obtained from the mass spectra data, were also proposed for the trimethylsilyl (TMS) derivatives of monohydroxy and dihydroxy paracetamol.

引用

页码：81 / 88

页数：8

共 24 条

[1] H2O2/TiO2 photocatalytic oxidation of metol.: Identification of intermediates and reaction pathways
Aceituno, M
Stalikas, CD
Lunar, L
Rubio, S
Pérez-Bendito, D
[J]. WATER RESEARCH, 2002, 36 (14) : 3582 - 3592
[2] Paracetamol oxidation from aqueous solutions by means of ozonation and H2O2/UV system
Andreozzi, R
Caprio, V
Marotta, R
Vogna, D
[J]. WATER RESEARCH, 2003, 37 (05) : 993 - 1004
[3] Degradation of tetracycline by photo-Fenton process - Solar irradiation and matrix effects
Bautitz, Ivonete Rossi
Nogueira, Raquel F. Pupo
[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2007, 187 (01) : 33 - 39
[4] Mineralization of paracetamol in aqueous medium by anodic oxidation with a boron-doped diamond electrode
Brillas, E
Sirés, I
Arias, C
Cabot, PL
Centellas, F
Rodríguez, RM
Garrido, JA
[J]. CHEMOSPHERE, 2005, 58 (04) : 399 - 406
[5] Advanced oxidation of caffeine in water:: On-line and real-time monitoring by electrospray ionization mass spectrometry
Dalmázio, I
Santos, LS
Lopes, RP
Eberlin, MN
Augusti, R
[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (16) : 5982 - 5988
[6] Pharmaceuticals and personal care products in the environment: Agents of subtle change?
Daughton, CG
Ternes, TA
[J]. ENVIRONMENTAL HEALTH PERSPECTIVES, 1999, 107 : 907 - 938
[7] Kinetic study of photocatalytic degradation of carbamazepine, clofibric acid, iomeprol and iopromide assisted by different TiO2 materials -: determination of intermediates and reaction pathways
Doll, TE
Frimmel, FH
[J]. WATER RESEARCH, 2004, 38 (04) : 955 - 964
[8] Photodegradation of Diquat and Paraquat in aqueous solutions by titanium dioxide:: evolution of degradation reactions and characterisation of intermediates
Florêncio, MH
Pires, E
Castro, AL
Nunes, MR
Borges, C
Costa, FM
[J]. CHEMOSPHERE, 2004, 55 (03) : 345 - 355
[9] Oxidation of pharmaceuticals during ozonation and advanced oxidation processes
Huber, MM
Canonica, S
Park, GY
Von Gunten, U
[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2003, 37 (05) : 1016 - 1024
[10] Pharmaceuticals, hormones, and other organic wastewater contaminants in US streams, 1999-2000: A national reconnaissance
Kolpin, DW
Furlong, ET
Meyer, MT
Thurman, EM
Zaugg, SD
Barber, LB
Buxton, HT
[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (06) : 1202 - 1211

← 1 2 3 →