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Removal of Emerging Pollutants by a 3-Step System: Hybrid Digester, Vertical Flow Constructed Wetland and Photodegradation Post-treatments
dc.contributor.author | Sánchez Núñez, Marta | |
dc.contributor.author | Ramos, Daniel R. | |
dc.contributor.author | Fernández-Pérez, María-Isabel | |
dc.contributor.author | Aguilar, Silvio D. | |
dc.contributor.author | Ruiz, Isabel | |
dc.contributor.author | Canle, Moisés | |
dc.contributor.author | Soto, Manuel | |
dc.date.accessioned | 2022-09-27T09:46:32Z | |
dc.date.available | 2022-09-27T09:46:32Z | |
dc.date.issued | 2022-06-22 | |
dc.identifier.citation | Sánchez, M., Ramos, D.R., Fernández, M.I., Aguilar, S., Ruiz, I., Canle, M., Soto, M., 2022. Removal of emerging pollutants by a 3-step system: Hybrid digester, vertical flow constructed wetland and photodegradation post-treatments. Science of The Total Environment 842, 156750. https://doi.org/10.1016/j.scitotenv.2022.156750 | es_ES |
dc.identifier.issn | 0048-9697 | |
dc.identifier.uri | http://hdl.handle.net/2183/31738 | |
dc.description | Financiado para publicación en acceso aberto: Universidade da Coruña/CISUG | es_ES |
dc.description.abstract | [Abstract] The removal of emerging pollutants from municipal wastewater was studied for the first time using a three-step pilot-scale system: 1) hybrid digester (HD) as first step, 2) subsurface vertical flow constructed wetland (VF) as second step, and 3) photodegradation (PD) unit as third step or post-treatment. The HD and VF units were built and operated in series with effluent recirculation at pilot scale. For the PD post-treatment, three alternatives were studied at lab-scale, i) UVC irradiation at 254 nm (0.5 h exposure time), ii) UVA irradiation at 365 nm using a TiO2-based photocatalyst and iii) sunlight irradiation using a TiO2-based photocatalyst, the last two for 1 and 2 h. Alternative iii) was also tested at pilot-scale. Degradation of nine compounds was evaluated: acetaminophen (ACE), caffeine (CAF), carbamazepine (CBZ), ketoprofen (KET), ibuprofen (IBU), diclofenac (DCL), clofibric acid (ACB), bisphenol A (BPA), and sotalol (SOT). Overall, the HD-VF-UVC system completely removed (>99.5 %) ACE, CAF, KET, IBU, DCL and ACB, and to a lesser extent SOT (98 %), BPA (83 %) and CBZ (51 %). On the other hand, the HD-VF-UVA/TiO2 system (at 2 h) achieved >99.5 % removal of ACE, CAF, KET, IBU and DCL while ACB, BPA, CBZ and SOT were degraded by 83 %, 81 %, 78 % and 68 %, respectively. Working also at 2 h of exposure time, in summer conditions, the HD-VF-Sol/TiO2 system achieved >99.5 % removal of ACE, CAF, KET, IBU, DCL and ACB, and to a minor extent BPA (80 %), SOT (74 %) and CBZ (69 %). Similar results, although slightly lower for SOT (60 %) and CBZ (59 %), were obtained in the pilot sunlight plus TiO2 catalyst unit. However, the use of sunlight irradiation with a TiO2-based photocatalyst clearly showed lower removal efficiency in autumn conditions (i.e., 47 % SOT, 31 % CBZ). | es_ES |
dc.description.sponsorship | This research was funded by the Spanish Ministerio de Economía y Competitividad through project CTQ2015-71238-R (MINECO/FEDER), and the Xunta de Galicia (project GPC ED431B 2020/52 and project GPC ED431B 2019/44), respectively. Funding for open access charge: Universidade da Coruña/CISUG | es_ES |
dc.description.sponsorship | Xunta de Galicia; GPC ED431B 2020/52 | es_ES |
dc.description.sponsorship | Xunta de Galicia; GPC ED431B 2019/44 | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTQ2015-71238-R/ES/SOSTENIBILIDAD DE RECURSOS HIDRICOS: REDUCCION DE CONTAMINANTES ORGANICOS PERSISTENTES MEDIANTE UN SISTEMA COMBINADO DE HUMEDALES Y FOTOCATALISIS HETEROGENEA/ | |
dc.relation.uri | https://doi.org/10.1016/j.scitotenv.2022.156750 | es_ES |
dc.rights | Atribución-NoComercial 4.0 Internacional | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/ | * |
dc.subject | Emerging pollutant | es_ES |
dc.subject | Hybrid digester | es_ES |
dc.subject | Constructed wetland | es_ES |
dc.subject | Advanced oxidation process | es_ES |
dc.subject | Municipal wastewater | es_ES |
dc.title | Removal of Emerging Pollutants by a 3-Step System: Hybrid Digester, Vertical Flow Constructed Wetland and Photodegradation Post-treatments | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.access | info:eu-repo/semantics/openAccess | es_ES |
UDC.journalTitle | Science of The Total Environment | es_ES |
UDC.volume | 842 | es_ES |
UDC.startPage | 156750 | es_ES |
dc.identifier.doi | 10.1016/j.scitotenv.2022.156750 |
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