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Phosphate removal using zeolite in treatment wetlands under different oxidation-reduction potentials
dc.contributor.author | Andrés, E. | |
dc.contributor.author | Araya, F. | |
dc.contributor.author | Vera-Puerto, Ismael L. | |
dc.contributor.author | Pozo, G. | |
dc.contributor.author | Vidal, G. | |
dc.date.accessioned | 2018-07-11T14:50:46Z | |
dc.date.available | 2018-07-11T14:50:46Z | |
dc.date.issued | 2018 | |
dc.identifier.uri | http://repositorio.ucm.cl/handle/ucm/1854 | |
dc.description.abstract | The 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.iso | en | es_CL |
dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | * |
dc.source | Ecological Engineering, 117, 18-27 | es_CL |
dc.subject | Langmuir adsorption kinetic | es_CL |
dc.subject | Oxidation-reduction potential | es_CL |
dc.subject | Phosphate | es_CL |
dc.subject | Sewage | es_CL |
dc.subject | Subsurface flow treatment wetland | es_CL |
dc.subject | Zeolite | es_CL |
dc.title | Phosphate removal using zeolite in treatment wetlands under different oxidation-reduction potentials | es_CL |
dc.type | Article | es_CL |
dc.ucm.facultad | Facultad de Ciencias de la Ingeniería | es_CL |
dc.ucm.indexacion | Scopus | es_CL |
dc.ucm.indexacion | Isi | es_CL |
dc.ucm.uri | sibib2.ucm.cl:2048/login?url=https://www.sciencedirect.com/science/article/pii/S0925857418300855 | es_CL |
dc.ucm.doi | doi.org/10.1016/j.ecoleng.2018.03.008 | es_CL |
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