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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2021
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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 |
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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 |
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