Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution

Adsorption of methylphosphonic acid (MPA) onto goethite (α-FeOOH) was studied as a function of pH and the concentration of MPA in solution. In situ attenuated total reflectance-FTIR (ATR-FTIR) techniques were used to identify the type of surface complexes formed under each of the solution conditions...

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Detalles Bibliográficos
Autor principal: Barja, Beatriz Carmen
Publicado: 1999
Materias:
Adsorption
Complexation
Composition effects
Electrophoresis
Fourier transform infrared spectroscopy
Organic acids
pH effects
Surface phenomena
Surface structure
Attenuated total reflection (ATR)
Goethite
Methylphosphonic acid
Iron compounds
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v15_n7_p2316_Barja
http://hdl.handle.net/20.500.12110/paper_07437463_v15_n7_p2316_Barja
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_07437463_v15_n7_p2316_Barja
record_format dspace
spelling paper:paper_07437463_v15_n7_p2316_Barja2023-06-08T15:44:49Z Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution Barja, Beatriz Carmen Adsorption Complexation Composition effects Electrophoresis Fourier transform infrared spectroscopy Organic acids pH effects Surface phenomena Surface structure Attenuated total reflection (ATR) Goethite Methylphosphonic acid Iron compounds Adsorption of methylphosphonic acid (MPA) onto goethite (α-FeOOH) was studied as a function of pH and the concentration of MPA in solution. In situ attenuated total reflectance-FTIR (ATR-FTIR) techniques were used to identify the type of surface complexes formed under each of the solution conditions used in the adsorption studies. Additionally, electrophoretic mobility measurements were performed in each of these systems. At low pH and high Γ, MPA was bound to the surface of goethite predominantly as a monodentate protonated species, while at high pH and low Γ the prevailing structure was that of a bridging bidentate complex. The change in denticity of the surface MPA under different solution conditions may explain the charge reversals shown in the electrophoretic mobility curves. Fil:Barja, B.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v15_n7_p2316_Barja http://hdl.handle.net/20.500.12110/paper_07437463_v15_n7_p2316_Barja
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Adsorption
Complexation
Composition effects
Electrophoresis
Fourier transform infrared spectroscopy
Organic acids
pH effects
Surface phenomena
Surface structure
Attenuated total reflection (ATR)
Goethite
Methylphosphonic acid
Iron compounds
spellingShingle Adsorption
Complexation
Composition effects
Electrophoresis
Fourier transform infrared spectroscopy
Organic acids
pH effects
Surface phenomena
Surface structure
Attenuated total reflection (ATR)
Goethite
Methylphosphonic acid
Iron compounds
Barja, Beatriz Carmen
Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution
topic_facet Adsorption
Complexation
Composition effects
Electrophoresis
Fourier transform infrared spectroscopy
Organic acids
pH effects
Surface phenomena
Surface structure
Attenuated total reflection (ATR)
Goethite
Methylphosphonic acid
Iron compounds
description Adsorption of methylphosphonic acid (MPA) onto goethite (α-FeOOH) was studied as a function of pH and the concentration of MPA in solution. In situ attenuated total reflectance-FTIR (ATR-FTIR) techniques were used to identify the type of surface complexes formed under each of the solution conditions used in the adsorption studies. Additionally, electrophoretic mobility measurements were performed in each of these systems. At low pH and high Γ, MPA was bound to the surface of goethite predominantly as a monodentate protonated species, while at high pH and low Γ the prevailing structure was that of a bridging bidentate complex. The change in denticity of the surface MPA under different solution conditions may explain the charge reversals shown in the electrophoretic mobility curves.
author Barja, Beatriz Carmen
author_facet Barja, Beatriz Carmen
author_sort Barja, Beatriz Carmen
title Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution
title_short Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution
title_full Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution
title_fullStr Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution
title_full_unstemmed Complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution
title_sort complexation of methylphosphonic acid with the surface of goethite particles in aqueous solution
publishDate 1999
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v15_n7_p2316_Barja
http://hdl.handle.net/20.500.12110/paper_07437463_v15_n7_p2316_Barja
work_keys_str_mv AT barjabeatrizcarmen complexationofmethylphosphonicacidwiththesurfaceofgoethiteparticlesinaqueoussolution
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