Elimination of carbamazepine by repeated treatment with laccase in the presence of 1-hydroxybenzotriazole.

Degradation of some benzodiazepines by a laccase-mediated system in aqueous solution.

Purified laccase from the soil ascomycete, Paraconiothyrium variabile was employed in the degradation of 7 benzodiazepine substances in the absence and presence of the enzyme mediators, 1-hydroxybenzotriazole (HBT), 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS), 2,6-dimethoxyphenol (DMP), and vanillic acid (VA). In the absence of a laccase mediator, the original concentrations of 10...

Biodegradation Removal of estrogenic activity of iso-butylparaben and n-butylparaben by laccase in the presence of 1-hydroxybenzotriazole

Elimination and detoxification of triclosan by manganese peroxidase from white rot fungus.

The antimicrobial and preservative agent triclosan (TCS) is an emerging and persistent pollutant with a ubiquitous presence in the aquatic environment. Thus, TCS was treated with manganese peroxidase (MnP), laccase and the laccase-mediator system with 1-hydroxybenzotriazole. MnP was most effective in eliminating TCS among the three enzymatic treatments, with TCS concentration being reduced by a...

Removal of trace organic contaminants by nitrifying activated sludge and whole-cell and crude enzyme extract of Trametes versicolor.

The resistance of certain anthropogenic trace organic contaminants (TrOCs) to conventional wastewater treatment and their potential adverse effects on human and ecological health raise significant concerns and have prompted research on their bioremediation by white-rot fungi. This study compared the removal efficiencies of four widespread TrOCs: carbamazepine (CBZ), sulfamethoxazole (SMX), bisp...

Degradation of nonphenolic lignin by the laccase/1-hydroxybenzotriazole system.

Phenolic and nonphenolic (permethylated) synthetic [14C]lignins were depolymerized by Trametes villosa laccase in the presence of a radical mediator, 1-hydroxybenzotriazole (HOBT). Gel permeation chromatography of the treated lignins showed that approximately 10% of their substructures were cleaved. The system also cleaved a beta-O-4-linked model compound, 1-(4-ethoxy-3-methoxy-ring-[14C]phenyl...