Microplastics Influence Phosphate Adsorption in Volcanic Ash Soil

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datacite.alternateIdentifier.citationJournal of Soil Science and Plant Nutrition, 2025
datacite.alternateIdentifier.doi10.1007/s42729-025-02472-2
datacite.alternateIdentifier.issn0718-9508
datacite.creatorSuazo-Hernández, Jonathan
datacite.creatorCáceres-Jensen, Lizethly
datacite.creatorPesenti, Héctor
datacite.creatorCorradini, Fabio
datacite.creatorde la Luz Mora, María
datacite.creatorBolan, Nanthi Sirangie
datacite.creatorCornejo, Pablo E.
datacite.creatorSarkar, Binoy
datacite.date2025
datacite.rightsAcceso abierto
datacite.subjectEmerging Contaminants
datacite.subjectEutrophication
datacite.subjectPlant Nutrients
datacite.subjectPlastic Pollution
datacite.subjectSoil Phosphorus
datacite.titleMicroplastics Influence Phosphate Adsorption in Volcanic Ash Soil
dc.contributor.authorPESENTI PEREZ, HECTOR GONZALO
dc.date.accessioned2025-10-06T14:21:59Z
dc.date.available2025-10-06T14:21:59Z
dc.description.abstractPurpose: There is a debate whether microplastic particles released into soils can modify phosphorus bioavailability by altering the soil surface properties. Here, we aim to explore the impact of polyethylene microplastics (PE MPs) on the adsorption–desorption of inorganic phosphate anions (P) on a volcanic ash soil (VAS). Methods: Batch P adsorption–desorption experiments were conducted in a Chilean VAS with and without 1% (w/w) PE-MPs addition, taking P concentrations (KH₂PO₄ dissolved in 0.01 mol L⁻¹ NaCl background solution) ranging from 0.02 to 6.47 mmol L⁻¹, with a solid (g):liquid (mL) ratio of 1:40, and at a pH range of 4.5 to 10.5 at 20 ± 1 °C. The VAS and VAS/PE-MPs systems were characterized, and kinetic and isotherm adsorption data were modeled to predict mechanisms. Results: The Elovich model described the kinetic P adsorption data on VAS with and without 1% PE-MPs (r² ≈ 0.985 and χ² ≈ 12). Adsorption isotherms fitted well to the Freundlich model (r² ≈ 0.994 and χ² ≈ 6.39), indicating a highly heterogeneous surface for both systems. The Freundlich model indicated an increase in P adsorption capacity from 49.55 (mmol kg⁻¹)(L mmol⁻¹)¹/ⁿ for VAS to 54.66 (mmol kg⁻¹)(L mmol⁻¹)¹/ⁿ for VAS + 1% PE-MPs. Desorption of P was higher in the VAS + 1% PE-MPs system compared to VAS alone. For both systems, solution pH showed no significant changes in P adsorption on VAS. Scanning electron microscopy–energy dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy results showed that P was bound to PE-MPs through weak van der Waals forces and/or a pore-filling mechanism. Conclusion: This study demonstrated that PE-MPs in VAS could modify surfaces available for P adsorption and act as a carrier to enhance P mobility. © 2025 Elsevier B.V. All rights reserved.
dc.description.ia_keywordadsorption, mmol, soil, desorption, were, systems, model
dc.formatPDF
dc.identifier.issn0718-9516
dc.identifier.urihttps://repositoriodigital.uct.cl/handle/10925/6892
dc.language.isoen
dc.publisherSpringer
dc.relationinstname: ANID
dc.relationreponame: Repositorio Digital RI2.0
dc.rights.driverinfo:eu-repo/semantics/openAccess
dc.sourceJournal of Soil Science and Plant Nutrition
dc.subject.ia_odsODS 7: Energía asequible y no contaminante
dc.subject.ia_oecd1nCiencias Naturales
dc.subject.ia_oecd2nCiencias Físicas
dc.subject.ia_oecd3nQuímica
dc.type.driverinfo:eu-repo/semantics/article
dc.type.driverhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.type.openaireinfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
oaire.citationEdition2025
oaire.citationTitleJournal of Soil Science and Plant Nutrition
oaire.fundingReferenceUFRO Dirección de Investigación
oaire.fundingReferenceANID FONDECYT 3230179 (Postdoctorado)
oaire.fundingReferenceCAUL Open Access (fondo publicación)
oaire.licenseConditionObra bajo licencia Creative Commons Atribución 4.0 Internacional
oaire.licenseCondition.urihttps://creativecommons.org/licenses/by/4.0/
oaire.resourceTypeArtículo
oaire.resourceType.enArticle
relation.isAuthorOfPublication06eb1649-f51e-4f5e-ade8-49a1aca6c98e
relation.isAuthorOfPublication.latestForDiscovery06eb1649-f51e-4f5e-ade8-49a1aca6c98e
uct.catalogadorjvu
uct.comunidadIngenieríaen_US
uct.departamentoDepartamento Procesos Industriales
uct.facultadFacultad de Ingeniería
uct.indizacionScience Citation Index Expanded - SCIE
uct.indizacionScopus
uct.indizacionCAB Abstracts
uct.indizacionAGRICOLA
uct.indizacionEnvironmental Abstracts
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