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Phosphate removal using zeolite in treatment wetlands under different oxidation-reduction potentials

dc.contributor.authorAndrés, E.
dc.contributor.authorAraya, F.
dc.contributor.authorVera-Puerto, Ismael L.
dc.contributor.authorPozo, G.
dc.contributor.authorVidal, G.
dc.date.accessioned2018-07-11T14:50:46Z
dc.date.available2018-07-11T14:50:46Z
dc.date.issued2018
dc.identifier.urihttp://repositorio.ucm.cl/handle/ucm/1854
dc.description.abstractThe aim of this study was a comparison between PO4−3-P removal from sewage using zeolite as support medium in subsurface flow treatment wetlands (SSF TWs) operated with different oxidation-reduction potentials (ORPs). In addition, the zeolite’s phosphate adsorption characteristics were evaluated. For this, Two mesocosm SSF TWs were installed and operated during 504 d for the PO4−3-P adsorption from sewage: a) mesocosm SSF TW with natural zeolite (MTW-Z1) and b) mesocosm SSF TW with gravel (MTW-G1). Two ORPs was used in MTW-Z1 and MTW-G1: a) ORP-A, ORP >+50 mV, b) ORP-B, ORP <−50 mV. Furthermore, the adsorption characteristics were evaluated in batch assays (zeolite amount and particle size were studied) with different PO4−3-P initial concentrations. Regarding the mesocosm SSF TWs evaluation, the PO4−3-P removed from sewage by MTW-Z1 is between 20% and 50% significantly (p < 0.05) higher than the MTW-G1. At the same time, ORP-A, above +50 mV, significantly improves (p < 0.05), by 10% more, the PO4−3-P removal capacity from sewage. Regarding adsorption characteristics, maximum adsorption capacity determined by Langmuir kinetic was 0.03 mg PO4−3-P g−1 for initial concentrations of 10–15 mg PO4−3-P L−1. In the case of MTW-Z1 with ORPs A (>+50 mV) and B (<−50 mV), the zeolite maximum adsorption capacity was 0.3 mg PO4−3-P g−1. Therefore, the potential maximum adsorption capacity of natural zeolite used as a medium in SSF TWs with ORP conditions below −50 mV and above +50 mV can be increased until 10-fold regarding Langmuir adsorption kinetic.es_CL
dc.language.isoenes_CL
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
dc.sourceEcological Engineering, 117, 18-27es_CL
dc.subjectLangmuir adsorption kinetices_CL
dc.subjectOxidation-reduction potentiales_CL
dc.subjectPhosphatees_CL
dc.subjectSewagees_CL
dc.subjectSubsurface flow treatment wetlandes_CL
dc.subjectZeolitees_CL
dc.titlePhosphate removal using zeolite in treatment wetlands under different oxidation-reduction potentialses_CL
dc.typeArticlees_CL
dc.ucm.facultadFacultad de Ciencias de la Ingenieríaes_CL
dc.ucm.indexacionScopuses_CL
dc.ucm.indexacionIsies_CL
dc.ucm.urisibib2.ucm.cl:2048/login?url=https://www.sciencedirect.com/science/article/pii/S0925857418300855es_CL
dc.ucm.doidoi.org/10.1016/j.ecoleng.2018.03.008es_CL


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