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dc.contributor.authorSujitra Tandornen_US
dc.contributor.authorOrn anong Arqueropanyoen_US
dc.contributor.authorWimol Naksataen_US
dc.contributor.authorPonlayuth Sooksamitien_US
dc.contributor.authorIngon Chaisrien_US
dc.description.abstract© 2019, Springer-Verlag GmbH Germany, part of Springer Nature. The characteristic of adsorption of As(V) onto ferric oxide-impregnated anion resin Dowex marathon MSA (FO-Dowex) was investigated. Batch adsorption experiment was studied as a function of pH, contact time, initial As(V) concentration, and temperature. The results revealed that the adsorption of As(V) onto FO-Dowex was highly pH-dependent and that the equilibrium time was attained within 360 min. Two-parameter equations (Langmuir, Freundlich, and Temkin) and three-parameter equations (Redlich–Peterson and Sips) isotherm models were used for modeling the experimental data for As(V) adsorption onto FO-Dowex at different temperatures through the non-linear regression method. The goodness of fit of the isotherm model to the experimental data was evaluated by comparing the statistical values of the coefficient of determination (R 2 ), Chi-square (χ 2 ) and the root mean square error (RMSE). From the isotherm analysis, the equilibrium data of As(V) adsorption onto FO-Dowex were found to be in good agreement with the Redlich–Peterson, Sips, and Langmuir isotherm model, based on the higher R 2 value and the lower values of χ 2 and RMSE as compared to other isotherm models. Furthermore, the calculation of thermodynamic parameters such as Gibbs free energy change (ΔG°), enthalpy change (ΔH°), and entropy change (ΔS°) revealed that the adsorption process was feasible, spontaneous, and endothermic in nature. All the results suggested that FO-Dowex could be used an effective and potential adsorbent for the removal of As(V) from aqueous solutions.en_US
dc.subjectAgricultural and Biological Sciencesen_US
dc.subjectEarth and Planetary Sciencesen_US
dc.subjectEnvironmental Scienceen_US
dc.titleAdsorption of arsenate from aqueous solution by ferric oxide-impregnated Dowex Marathon MSA anion exchange resin: application of non-linear isotherm modeling and thermodynamic studiesen_US
article.title.sourcetitleEnvironmental Earth Sciencesen_US
article.volume78en_US Mai Universityen_US Office of Primary Industries and Mines Region 3en_US
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