Cargando…

Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes

[Image: see text] Granular activated carbon (GAC) filters can be used to reduce emissions of organic micropollutants via municipal wastewater, but it is still uncertain to which extent biological degradation contributes to their removal in GAC filters. (14)C-labeled organic micropollutants were ther...

Descripción completa

Detalles Bibliográficos
Autores principales: Betsholtz, Alexander, Karlsson, Stina, Svahn, Ola, Davidsson, Åsa, Cimbritz, Michael, Falås, Per
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8383275/
https://www.ncbi.nlm.nih.gov/pubmed/34311545
http://dx.doi.org/10.1021/acs.est.1c02728
_version_ 1783741705186443264
author Betsholtz, Alexander
Karlsson, Stina
Svahn, Ola
Davidsson, Åsa
Cimbritz, Michael
Falås, Per
author_facet Betsholtz, Alexander
Karlsson, Stina
Svahn, Ola
Davidsson, Åsa
Cimbritz, Michael
Falås, Per
author_sort Betsholtz, Alexander
collection PubMed
description [Image: see text] Granular activated carbon (GAC) filters can be used to reduce emissions of organic micropollutants via municipal wastewater, but it is still uncertain to which extent biological degradation contributes to their removal in GAC filters. (14)C-labeled organic micropollutants were therefore used to distinguish degradation from adsorption in a GAC-filter media with associated biofilm. The rates and extents of biological degradation and adsorption were investigated and compared with other biofilm systems, including a moving bed biofilm reactor (MBBR) and a sand filter, by monitoring (14)C activities in the liquid and gas phases. The microbial cleavage of ibuprofen, naproxen, diclofenac, and mecoprop was confirmed for all biofilms, based on the formation of (14)CO(2), whereas the degradation of (14)C-labeled moieties of sulfamethoxazole and carbamazepine was undetected. Higher degradation rates for diclofenac were observed for the GAC-filter media than for the other biofilms. Degradation of previously adsorbed diclofenac onto GAC could be confirmed by the anaerobic adsorption and subsequent aerobic degradation by the GAC-bound biofilm. This study demonstrates the potential use of (14)C-labeled micropollutants to study interactions and determine the relative contributions of adsorption and degradation in GAC-based treatment systems.
format Online
Article
Text
id pubmed-8383275
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher American Chemical Society
record_format MEDLINE/PubMed
spelling pubmed-83832752021-08-31 Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes Betsholtz, Alexander Karlsson, Stina Svahn, Ola Davidsson, Åsa Cimbritz, Michael Falås, Per Environ Sci Technol [Image: see text] Granular activated carbon (GAC) filters can be used to reduce emissions of organic micropollutants via municipal wastewater, but it is still uncertain to which extent biological degradation contributes to their removal in GAC filters. (14)C-labeled organic micropollutants were therefore used to distinguish degradation from adsorption in a GAC-filter media with associated biofilm. The rates and extents of biological degradation and adsorption were investigated and compared with other biofilm systems, including a moving bed biofilm reactor (MBBR) and a sand filter, by monitoring (14)C activities in the liquid and gas phases. The microbial cleavage of ibuprofen, naproxen, diclofenac, and mecoprop was confirmed for all biofilms, based on the formation of (14)CO(2), whereas the degradation of (14)C-labeled moieties of sulfamethoxazole and carbamazepine was undetected. Higher degradation rates for diclofenac were observed for the GAC-filter media than for the other biofilms. Degradation of previously adsorbed diclofenac onto GAC could be confirmed by the anaerobic adsorption and subsequent aerobic degradation by the GAC-bound biofilm. This study demonstrates the potential use of (14)C-labeled micropollutants to study interactions and determine the relative contributions of adsorption and degradation in GAC-based treatment systems. American Chemical Society 2021-07-27 2021-08-17 /pmc/articles/PMC8383275/ /pubmed/34311545 http://dx.doi.org/10.1021/acs.est.1c02728 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Betsholtz, Alexander
Karlsson, Stina
Svahn, Ola
Davidsson, Åsa
Cimbritz, Michael
Falås, Per
Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes
title Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes
title_full Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes
title_fullStr Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes
title_full_unstemmed Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes
title_short Tracking (14)C-Labeled Organic Micropollutants to Differentiate between Adsorption and Degradation in GAC and Biofilm Processes
title_sort tracking (14)c-labeled organic micropollutants to differentiate between adsorption and degradation in gac and biofilm processes
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8383275/
https://www.ncbi.nlm.nih.gov/pubmed/34311545
http://dx.doi.org/10.1021/acs.est.1c02728
work_keys_str_mv AT betsholtzalexander tracking14clabeledorganicmicropollutantstodifferentiatebetweenadsorptionanddegradationingacandbiofilmprocesses
AT karlssonstina tracking14clabeledorganicmicropollutantstodifferentiatebetweenadsorptionanddegradationingacandbiofilmprocesses
AT svahnola tracking14clabeledorganicmicropollutantstodifferentiatebetweenadsorptionanddegradationingacandbiofilmprocesses
AT davidssonasa tracking14clabeledorganicmicropollutantstodifferentiatebetweenadsorptionanddegradationingacandbiofilmprocesses
AT cimbritzmichael tracking14clabeledorganicmicropollutantstodifferentiatebetweenadsorptionanddegradationingacandbiofilmprocesses
AT falasper tracking14clabeledorganicmicropollutantstodifferentiatebetweenadsorptionanddegradationingacandbiofilmprocesses