Study of Sorption Kinetics and Sorption-Desorption Models to Assess the Transport Mechanisms of 2,4-Dichlorophenoxyacetic Acid on Volcanic Soils

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dc.contributor.authorCaceres-Jensen, Lizethly
dc.contributor.authorRodriguez-Becerra, Jorge
dc.contributor.authorGarrido, Carlos
dc.contributor.authorEscudey, Mauricio
dc.contributor.authorBarrientos, Lorena
dc.contributor.authorParra-Rivero, Jocelyn
dc.contributor.authorDominguez-Vera, Valentina
dc.contributor.authorLoch-Arellano, Bruno
dc.date.accessioned2025-01-20T22:17:34Z
dc.date.available2025-01-20T22:17:34Z
dc.date.issued2021
dc.description.abstractThe sorption behavior of 2,4-dichlorophenoxyacetic acid (2,4-D) in the abundant agricultural volcanic ash-derived soils (VADS) is not well understood despite being widely used throughout the world, causing effects to the environment and human health. The environmental behavior and risk assessment of groundwater pollution by pesticides can be evaluated through kinetic models. This study evaluated the sorption kinetics and 2,4-D sorption-desorption in ten VADS through batch sorption experiments. Differences in the sorption extent for the fast and slow phases was observed through the IPD model where 2,4-D sorption kinetics was controlled by external mass transfer and intra organic matter diffusion in Andisols (C1 not equal 0). We confirmed from the spectroscopic analysis that the carboxylate group directly drives the interaction of 2,4-D on Andisol soil. The MLR model showed that IEP, FeDCB, and pHxSilt are important soil descriptors in the 2,4-D sorption in VADS. The Freundlich model accurately represented sorption equilibrium data in all cases (Kf values between 1.1 and 24.1 mu g(1-1/n) mL(1/n)g(-1)) with comparatively higher sorption capacity on Andisols, where the highest hysteresis was observed in soils that presented the highest and lowest OC content (H close to 0).
dc.fuente.origenWOS
dc.identifier.doi10.3390/ijerph18126264
dc.identifier.eissn1660-4601
dc.identifier.urihttps://doi.org/10.3390/ijerph18126264
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94552
dc.identifier.wosidWOS:000666325300001
dc.issue.numero12
dc.language.isoen
dc.revistaInternational journal of environmental research and public health
dc.rightsacceso restringido
dc.subjectherbicides
dc.subjectvariable-charge-soils
dc.subjectsorption mechanism
dc.subjectsorption kinetics models
dc.subjectspectroscopic analysis
dc.subject.ods02 Zero Hunger
dc.subject.odspa02 Hambre cero
dc.titleStudy of Sorption Kinetics and Sorption-Desorption Models to Assess the Transport Mechanisms of 2,4-Dichlorophenoxyacetic Acid on Volcanic Soils
dc.typeartículo
dc.volumen18
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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