Competitive Adsorption of As (III), As (V), and PO 4 by an Iron Oxide Impregnated Activated Carbon: Surface Complex Modeling

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dc.contributor.authorNgantcha-Kwimi, T. Angele
dc.contributor.authorReed, Brian E.
dc.date.accessioned2020-10-07T16:58:04Z
dc.date.available2020-10-07T16:58:04Z
dc.date.issued2020-09-02
dc.description.abstractThe 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.en_US
dc.description.urihttps://link.springer.com/article/10.1007/s11270-020-04853-y#citeasen_US
dc.format.extent11 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2dbiu-gxln
dc.identifier.citationNgantcha-Kwimi, T.A., Reed, B.E. Competitive Adsorption of As(III), As(V), and PO4 by an Iron Oxide Impregnated Activated Carbon: Surface Complex Modeling. Water Air Soil Pollut 231, 478 (2020). https://doi.org/10.1007/s11270-020-04853-yen_US
dc.identifier.urihttps://doi.org/10.1007/s11270-020-04853-y
dc.identifier.urihttp://hdl.handle.net/11603/19749
dc.language.isoen_USen_US
dc.publisherSpringer Natureen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Chemical, Biochemical & Environmental Engineering Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.titleCompetitive Adsorption of As (III), As (V), and PO 4 by an Iron Oxide Impregnated Activated Carbon: Surface Complex Modelingen_US
dc.typeTexten_US

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