학술논문
Electrochemical method to study the environmental behavior of Glyphosate on volcanic soils: Proposal of adsorption-desorption and transport mechanisms.
Document Type
Academic Journal
Author
Caceres-Jensen L; Laboratorio de Fisicoquímica & Analítica, Departamento de Química, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Avenida José Pedro Alessandri 774, Santiago, Chile. Electronic address: lyzethly.caceres@umce.cl.; Rodríguez-Becerra J; Laboratorio de Fisicoquímica & Analítica, Departamento de Química, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Avenida José Pedro Alessandri 774, Santiago, Chile.; Sierra-Rosales P; Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, P.O Box 8940577, San Joaquín, Santiago, Chile.; Escudey M; Facultad de Química y Biología, Universidad de Santiago de Chile, Avenida Alameda Libertador Bernardo O'Higgins 3363, Santiago, Chile; Center for the Development of Nanoscience and Nanotechnology, CEDENNA, 9170124, Santiago, Chile.; Valdebenito J; Laboratorio de Fisicoquímica & Analítica, Departamento de Química, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Avenida José Pedro Alessandri 774, Santiago, Chile.; Neira-Albornoz A; Laboratorio de Fisicoquímica & Analítica, Departamento de Química, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Avenida José Pedro Alessandri 774, Santiago, Chile; Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Independencia, Chile.; Dominguez-Vera V; Laboratorio de Fisicoquímica & Analítica, Departamento de Química, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Avenida José Pedro Alessandri 774, Santiago, Chile.; Villagra CA; Instituto de Entomología, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Avenida José Pedro Alessandri 774, Santiago, Chile.
Source
Publisher: Elsevier Country of Publication: Netherlands NLM ID: 9422688 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-3336 (Electronic) Linking ISSN: 03043894 NLM ISO Abbreviation: J Hazard Mater Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
Glyphosate is used extensively worldwide, but current evidence suggests detrimental effects on the environment, pollinators, and human health. Glyphosate adsorption kinetics and adsorption/desorption were studied through batch sorption experiments in ten typical volcanic ash-derived soils from Andisol and Ultisol orders. Two kinetic models were used to fit the experimental data: i. Models that allowed establishment of principally kinetic parameters and modeling of the adsorption process, and ii. Models described solute transport mechanisms commonly used for remediation purposes. Adsorption kinetic data were best fitted by the pseudo-second-order kinetic model and Two-Site Nonequilibrium model. These models suggest that mechanisms are complex due to rapid surface adsorption in ultisols with mass transfer controlling adsorption kinetics across the boundary layer, as indicated by the highhand lowt 1/2 values. High intraparticle diffusion into macropores and micropores was observed for Andisols. The Freundlich model accurately represented adsorption equilibrium data in all cases (R 2 > 0.9580) with comparatively higher adsorption capacity on Andisols. K f values (2.50-52.28 μg 1-1/n mL 1/n g -1 ) and hysteresis were significant in all studied soils. Taken together, these data suggest that Glyphosate may be adsorbed more on Andisol soils in comparison to Ultisols.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
(Copyright © 2019 Elsevier B.V. All rights reserved.)