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2288622 
Journal Article 
Fe2+ enhancing sulfamethazine degradation in aqueous solution by gamma irradiation 
Liu, Y; Hu, Jun; Wang, J 
2014 
1 
Radiation Physics and Chemistry
ISSN: 0969-806X 
96 
81-87 
WOS:000330157400013 
The radiation-induced degradation of sulfamethazine (SMT) was carried out by gamma irradiation. SMT with initial concentration of 20 mg/L was irradiated in the presence of 0, 0.1, 0.2, 0.4 and 0.6 mM extra Fe2+. The results showed that ferrous ion (Fe2+) could enhance the degradation of SMT by gamma irradiation in aqueous solution. SMT could be almost completely removed at 1 kGy without extra Fe2+, however, TOC removal efficiency was less than 10%. Several intermediate products, such as 4,6-dimethylpyrimidin-2-amine, 4-aminobenzenesulfonic acid, 4-nitrophenol 4-nitrobenzenesulfonic acid, 2-amino-6-methylpyrimidine-4-carboxylic acid, and 4-amino-N-carbamimidoyl-benzenesulfonamide and formic acid, acetic acid, and sulfate were identified. Possible pathway of SMT degradation in aqueous solution was tentatively proposed. (C) 2013 Elsevier Ltd. All rights reserved. 
Sulfamethazine (SMT); Antibiotics; Ferrous ion (Fe2+); Catalytic degradation; Advanced oxidation process (A0Ps)