Print Email Facebook Twitter Elucidating the removal of organic micropollutants on biological ion exchange resins Title Elucidating the removal of organic micropollutants on biological ion exchange resins Author Liu, Zhen (Université de Montréal; Polytechnique Montreal) Solliec, Morgan (Polytechnique Montreal) Papineau, Isabelle (Polytechnique Montreal) Lompe, K.M. (TU Delft Sanitary Engineering) Mohseni, Madjid (University of British Columbia) Bérubé, Pierre R. (University of British Columbia) Sauvé, Sébastien (Université de Montréal) Barbeau, Benoit (Polytechnique Montreal) Date 2022 Abstract Biological ion exchange (BIEX) refers to operating ion exchange (IX) filters with infrequent regeneration to favor the microbial growth on resin surface and thereby contribute to the removal of organic matter through biodegradation. However, the extent of biodegradation on BIEX resins is still debatable due to the difficulty in discriminating between biodegradation and IX. The objective of the present study was to evaluate the performance of BIEX resins for the removal of organic micropollutants and thereby validate the occurrence of biodegradation. The removals of biodegradable micropollutants (neutral: caffeine and estradiol; negative: ibuprofen and naproxen) and nonbiodegradable micropollutants with different charges (neutral: atrazine and thiamethoxam; negative: PFOA and PFOS) were respectively monitored during batch tests with biotic and abiotic BIEX resins. Results demonstrated that biodegradation contributed to the removal of caffeine, estradiol, and ibuprofen, confirming that biodegradation occurred on the BIEX resins. Furthermore, biodegradation contributed to a lower extent to the removal of naproxen probably due to the absence of an adapted bacterial community (Biotic: 49% vs Abiotic: 38% after 24 h batch test). The removal of naproxen, PFOS, and PFOA were attributable to ion exchange with previously retained natural organic matter on BIEX resins. Nonbiodegradable and neutral micropollutants (atrazine and thiamethoxam) were minimally (6%–10%) removed during the batch tests. Overall, the present study corroborates that biomass found on BIEX resins contribute to the removal of micropollutants through biodegradation and ion exchange resins can be used as biomass support for biofiltration. Subject BiodegradationBiological ion exchange (BIEX)Ion exchange resinsMicropollutantsNatural organic matter (NOM)PFAS To reference this document use: http://resolver.tudelft.nl/uuid:eb2f1271-bc84-478d-b79c-31cbb28a9398 DOI https://doi.org/10.1016/j.scitotenv.2021.152137 Embargo date 2023-07-01 ISSN 0048-9697 Source Science of the Total Environment, 808, 1-8 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 Zhen Liu, Morgan Solliec, Isabelle Papineau, K.M. Lompe, Madjid Mohseni, Pierre R. Bérubé, Sébastien Sauvé, Benoit Barbeau Files PDF 1_s2.0_S0048969721072132_main.pdf 1.06 MB Close viewer /islandora/object/uuid:eb2f1271-bc84-478d-b79c-31cbb28a9398/datastream/OBJ/view