Logo Kérwá
 

Biodegradation of sulfamethazine by Trametes versicolor: Removal from sewage sludge and identification of intermediate products by UPLC–QqTOF-MS

Loading...
Thumbnail Image

Authors

García Galán, María Jesús
Rodríguez Rodríguez, Carlos E.
Vicent, Teresa
Caminal, Glòria
Díaz Cruz, M. Silvia
Barceló Cullerès, Damià

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Degradation of the sulfonamide sulfamethazine (SMZ) by the white-rot fungus Trametes versicolor was assessed. Elimination was achieved to nearly undetectable levels after 20 h in liquid medium when SMZ was added at 9 mg L−1 . Experiments with purified laccase and laccase-mediators resulted in almost complete removal. On the other hand, inhibition of SMZ degradation was observed when piperonilbutoxide, a cytochrome P450-inhibitor, was added to the fungal cultures. UPLC–QqTOF-MS analysis allowed the identification and confirmation of 4 different SMZ degradation intermediates produced by fungal cultures or purified laccase: desulfo-SMZ, N4 -formyl-SMZ, N4 -hydroxy-SMZ and desamino-SMZ; nonetheless SMZ mineralization was not demonstrated with the isotopically labeled sulfamethazine-phenyl-13C6 after 7 days. Inoculation of T. versicolor to sterilized sewage sludge in solid-phase systems showed complete elimination of SMZ and also of other sulfon amides (sulfapyridine, sulfathiazole) at real environmental concentrations, making this fungus an interesting candidate for further remediation research.

Description

Keywords

Sulfamethazine, Trametes versicolor, Sewage sludge, Degradation metabolites, UPLC–QqTOF-MS analysis

Citation

https://www-sciencedirect-com.ezproxy.sibdi.ucr.ac.cr/science/article/pii/S0048969711008862

Collections

Endorsement

Review

Supplemented By

Referenced By