Metabolites from fungal laccase-catalysed transformation of sulfonamides

Schwarz, Jette; Aust, Marc-Oliver; Thiele‐Bruhn, Sören

doi:10.1016/j.chemosphere.2010.08.053

Cited by 59 publications

(22 citation statements)

References 25 publications

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“…Polyphenol and polyphenol derivatives were used to mimic humic acid reactivity, e.g., for enzyme-catalyzed cross-coupling reaction with sulfonamides in order to study mechanisms of bound residue formation (Bialk et al, 2005(Bialk et al, , 2007Schwarz et al, 2010). Photodegradation of HA was studied with model substances like tannic acid and/or p-hydroxybenzoic acid (Cowen and Al-Abadleh, 2009).…”

Section: Introductionmentioning

confidence: 99%

Molecular modeling of soil organic matter: Squaring the circle?

Schaumann

Thiele‐Bruhn

2011

Geoderma

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Section: Introductionmentioning

confidence: 99%

Molecular modeling of soil organic matter: Squaring the circle?

Schaumann

Thiele‐Bruhn

2011

Geoderma

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“…Laccase enzymes are widespread among plants, fungi and bacteria, and have various biological functions, such as degradation of complex polymers (lignin, humic acid), lignification, detoxification, pathogenicity, morphogenesis, sporulation, polymerization of melanin and spore coat resistance (Strong & Claus 2011). The ability of fungal laccases to catalyze (alone or with the help of mediators) the oxidation of pharmaceuticals and biocides was shown for several substances, such as endocrine compounds (Auriol et al 2008; Cabana et al 2007), analgesic and anti-inflammatory drugs (Lu et al 2009; Marco-Urrea et al 2010; Margot et al 2013b), antibiotics (Schwarz et al 2010; Suda et al 2012), UV filter (Garcia et al 2011), biocides (Margot et al 2013b) and various halogenated pesticides (Torres-Duarte et al 2009). Due to their wide range of substrates and the sole requirement of oxygen as the co-substrate, laccases appear to be a promising biocatalyst to enhance the biodegradation of micropollutants in wastewater in a complementary treatment step.…”

Section: Introductionmentioning

confidence: 99%

Bacterial versus fungal laccase: potential for micropollutant degradation

et al. 2013

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Relatively high concentrations of micropollutants in municipal wastewater treatment plant (WWTP) effluents underscore the necessity to develop additional treatment steps prior to discharge of treated wastewater. Microorganisms that produce unspecific oxidative enzymes such as laccases are a potential means to improve biodegradation of these compounds. Four strains of the bacterial genus Streptomyces (S. cyaneus, S. ipomoea, S. griseus and S. psammoticus) and the white-rot fungus Trametes versicolor were studied for their ability to produce active extracellular laccase in biologically treated wastewater with different carbon sources. Among the Streptomyces strains evaluated, only S. cyaneus produced extracellular laccase with sufficient activity to envisage its potential use in WWTPs. Laccase activity produced by T. versicolor was more than 20 times greater, the highest activity being observed with ash branches as the sole carbon source. The laccase preparation of S. cyaneus (abbreviated LSc) and commercial laccase from T. versicolor (LTv) were further compared in terms of their activity at different pH and temperatures, their stability, their substrate range, and their micropollutant oxidation efficiency. LSc and LTv showed highest activities under acidic conditions (around pH 3 to 5), but LTv was active over wider pH and temperature ranges than LSc, especially at near-neutral pH and between 10 and 25°C (typical conditions found in WWTPs). LTv was also less affected by pH inactivation. Both laccase preparations oxidized the three micropollutants tested, bisphenol A, diclofenac and mefenamic acid, with faster degradation kinetics observed for LTv. Overall, T. versicolor appeared to be the better candidate to remove micropollutants from wastewater in a dedicated post-treatment step.

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“…It does not include the opening of the heterocyclic ring but the degradation is described through the extrusion of the SO 2 group. These studies dealt with enzymatic degradation (Schwarz et al 2010;García-Galán et al 2011), biodegradation (García-Galán et al 2012, and photolysis (Boreen et al 2005;Garcia-Galan et al Garcia-Galan et al 2012;Periša et al 2013;Zessela et al 2014).…”

Section: Degradation Pathwaysmentioning

confidence: 99%

Photolytic and thin TiO2 film assisted photocatalytic degradation of sulfamethazine in aqueous solution

Babić

Zrnčić

Ljubas

et al. 2015

Environ Sci Pollut Res

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This paper deals with the photolytic and the photocatalytic degradation of sulfonamide antibiotic sulfamethazine (SMT) dissolved in Milli-Q water and in synthetic wastewater. Besides the direct photolysis, oxidation processes including UV/H2O2, UV/TiO2, and UV/TiO2/H2O2 using UV-A and UV-C radiation were investigated. Pseudo-first-order kinetics was observed for the degradation of SMT in all investigated processes. Additions of an electron acceptor (H2O2) and a catalyst (TiO2 film) accelerated the photolytic degradation of SMT for both the UV-A- and the UV-C-based processes. The most efficient process was UV-C/TiO2/H2O2 with complete degradation of SMT obtained in 10 min. The UV-A-based processes have been less efficient in terms of irradiation time required to totally degrade SMT than the UV-C-based processes. It was also confirmed that different wastewater components can significantly reduce the degradation rate of SMT. An almost ninefold reduction in the rate constant of SMT was observed for the specific synthetic wastewater. Although UV-A radiation experiments need more time and energy (2.7 times more electrical energy was consumed per gram of demineralized SMT) than UV-C experiments, they have a potential for practical use since natural UV-A solar radiation could be used here, which lowers the overall cost of the treatment. Five degradation products were detected during the degradation processes, and their structural formulae are presented. The structural formulae were elucidated based on mass spectra fragmentation pattern obtained using the tandem mass spectrometry (MS/MS) and NMR analysis.

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Metabolites from fungal laccase-catalysed transformation of sulfonamides

Cited by 59 publications

References 25 publications

Molecular modeling of soil organic matter: Squaring the circle?

Molecular modeling of soil organic matter: Squaring the circle?

Bacterial versus fungal laccase: potential for micropollutant degradation

Photolytic and thin TiO2 film assisted photocatalytic degradation of sulfamethazine in aqueous solution

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