Adsorption of Glyphosate on Goethite (α-FeOOH): Surface Complexation Modeling Combining Spectroscopic and Adsorption Data

2008 ◽  
Vol 42 (7) ◽  
pp. 2464-2469 ◽  
Author(s):  
Caroline M. Jonsson ◽  
Per Persson ◽  
Staffan Sjöberg ◽  
John S. Loring
Keyword(s):  
Surface Complexation ◽  
Surface Complexation Modeling ◽  
Adsorption Data

scholarly journals Competitive Adsorption of As(III), As(V), and PO4 by an Iron Oxide Impregnated Activated Carbon: Surface Complex Modeling

2020 ◽  
Vol 231 (9) ◽  
Author(s):  
T. Angele Ngantcha-Kwimi ◽  
Brian E. Reed
Keyword(s):  
Iron Oxide ◽  
Competitive Adsorption ◽  
Surface Complexation ◽  
Carbon Surface ◽  
Hydrous Ferric Oxide ◽  
Layer Model ◽  
Surface Complexation Modeling ◽  
Adsorption Data ◽  
Double Layer Model ◽  
Binuclear Species

Abstract The objective of this study was to predict the competitive adsorption of As(III), As(V), and PO4 by an iron oxide impregnated carbon (L-Act, 9% Fe(III) amorphous iron oxide) over a range of environmental conditions using the surface complexation modeling (SCM) approach. L-Act surface complexation constants determined from a single pH-adsorption edge were used to predict pH-dependent competitive removal in singular, binary, and tertiary adsorbate systems. As(III), As(V), and PO4 complexes were modeled as bidentate binuclear species at low pH and monodentate species at high pH using the two monoprotic surface site/diffuse electric double layer model (2MDLM). F values determined based on 2MDLM predictions were close to those calculated by FITEQL (a statistical optimization program) demonstrating the effectiveness of the 2MDLM in describing adsorption behavior. F values were generally in the recommended range of 0.1–20 indicating a good fit between the data and the model. The 2MDLM also successfully predicted As(III)/As(V)/PO4 adsorption data of hydrous ferric oxide and goethite adsorbents from the literature.

Surface Complexation Modeling of Eu(III) and U(VI) Interactions with Graphene Oxide

2016 ◽  
Vol 50 (4) ◽  
pp. 1821-1827 ◽  
Author(s):  
Yu Xie ◽  
Edward M. Helvenston ◽  
Lindsay C. Shuller-Nickles ◽  
Brian A. Powell
Keyword(s):  
Graphene Oxide ◽  
Surface Complexation ◽  
Surface Complexation Modeling

Surface complexation modeling of Pb(II) adsorption on mixtures of hydrous ferric oxide, quartz and kaolinite

2010 ◽  
Vol 275 (3-4) ◽  
pp. 262-271 ◽  
Author(s):  
Thomas J. Reich ◽  
Soumya Das ◽  
Carla M. Koretsky ◽  
Tracy J. Lund ◽  
Christopher J. Landry
Keyword(s):  
Ferric Oxide ◽  
Surface Complexation ◽  
Hydrous Ferric Oxide ◽  
Surface Complexation Modeling
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