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Fungal treatment for the removal of endocrine disrupting compounds from reverse osmosis concentrate: Identification and monitoring of transformation products of benzotriazoles

The removal of 27 endocrine-disrupting compounds and related compounds (suspect effect) from a reverse osmosis concentrate using an alternative decontamination method based on a fungal treatment involving Trametes versicolor was assessed. In addition to chemical analysis, the toxicity of the treated water during the treatment was monitored using a bioluminescence inhibition test and estrogenic and anti-estrogenic tests. The compounds 1H-benzotriazole (BTZ) and two tolyltriazoles (TTZs), 4-methyl-1H-benzotriazole (4-MBTZ) and 5-methyl-1H-benzotriazole (5-MBTZ), were present in the reverse osmosis concentrate at the highest concentrations (7.4 and 12.8 μg L −1 , respectively) and were partially removed by the fungal treatment under sterile conditions (58% for BTZ and 92% for TTZs) and non-sterile conditions, although to lesser extents (32% for BTZ and 50% for TTZs). Individual biotransformation studies of BTZ and the TTZs by T. versicolor in a synthetic medium and further analysis via on-line turbulent flow chromatography coupled to an HRMS-Orbitrap allowed the tentative identification of the transformation products (TPs). Six TPs were postulated for BTZ, two TPs were postulated for 4-MBTZ, and four TPs were postulated for 5-MBTZ. Most of these TPs are suggested to have been generated by conjugation with some sugars and via the methylation of the triazole group. Only TP 148 A, postulated to be derived from the biotransformation of BTZ, was observed in the effluent of the bioreactor treating the reverse osmosis concentrate

This work has been supported by the Spanish Ministry of Economy, Industry and Competitiveness (project CTQ2010-21776-C02 and CTM2013-48545-C2), co-financed by the European Union through the European Regional Development Fund (ERDF) and supported by the Generalitat de Catalunya (Consolidated Research Groups: Catalan Institute for water Research 2014 SGR 291 and 2014 SGR 476)

© Chemosphere, 2017, vol. 184, p. 1054-1070

Elsevier

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Llorca, Marta
Badia-Fabregat, Marina
Rodríguez Mozaz, Sara
Caminal, Gloria
Vicent, Teresa
Barceló i Cullerés, Damià
Date: 2017 October 1
Abstract: The removal of 27 endocrine-disrupting compounds and related compounds (suspect effect) from a reverse osmosis concentrate using an alternative decontamination method based on a fungal treatment involving Trametes versicolor was assessed. In addition to chemical analysis, the toxicity of the treated water during the treatment was monitored using a bioluminescence inhibition test and estrogenic and anti-estrogenic tests. The compounds 1H-benzotriazole (BTZ) and two tolyltriazoles (TTZs), 4-methyl-1H-benzotriazole (4-MBTZ) and 5-methyl-1H-benzotriazole (5-MBTZ), were present in the reverse osmosis concentrate at the highest concentrations (7.4 and 12.8 μg L −1 , respectively) and were partially removed by the fungal treatment under sterile conditions (58% for BTZ and 92% for TTZs) and non-sterile conditions, although to lesser extents (32% for BTZ and 50% for TTZs). Individual biotransformation studies of BTZ and the TTZs by T. versicolor in a synthetic medium and further analysis via on-line turbulent flow chromatography coupled to an HRMS-Orbitrap allowed the tentative identification of the transformation products (TPs). Six TPs were postulated for BTZ, two TPs were postulated for 4-MBTZ, and four TPs were postulated for 5-MBTZ. Most of these TPs are suggested to have been generated by conjugation with some sugars and via the methylation of the triazole group. Only TP 148 A, postulated to be derived from the biotransformation of BTZ, was observed in the effluent of the bioreactor treating the reverse osmosis concentrate
This work has been supported by the Spanish Ministry of Economy, Industry and Competitiveness (project CTQ2010-21776-C02 and CTM2013-48545-C2), co-financed by the European Union through the European Regional Development Fund (ERDF) and supported by the Generalitat de Catalunya (Consolidated Research Groups: Catalan Institute for water Research 2014 SGR 291 and 2014 SGR 476)
Format: application/pdf
Citation: https://doi.org/10.1016/j.chemosphere.2017.06.053
ISSN: 0045-6535
Document access: http://hdl.handle.net/10256/14356
Language: eng
Publisher: Elsevier
Collection: MINECO/PN 2010-2013/CTQ2010-21776
MINECO/PN 2013-2016/CTM 2013-48545-C2
Versió postprint del document publicat a: https://doi.org/10.1016/j.chemosphere.2017.06.053
Articles publicats (ICRA)
Is part of: © Chemosphere, 2017, vol. 184, p. 1054-1070
Rights: Tots els drets reservats
Subject: Osmosi inversa
Reverse osmosis
Bioremediació
Bioremediation
Title: Fungal treatment for the removal of endocrine disrupting compounds from reverse osmosis concentrate: Identification and monitoring of transformation products of benzotriazoles
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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