Removal of arsenic(III) ions from aqueous solutions by modified hazelnut shell

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dc.contributor.authorSert S.
dc.contributor.authorÇelik A.
dc.contributor.authorTirtom V.N.
dc.date.accessioned2024-07-22T08:10:52Z
dc.date.available2024-07-22T08:10:52Z
dc.date.issued2017
dc.description.abstractIn this study, modified hazelnut shells (HS) were used to remove As(III) ions from aqueous solu­tions. For this purpose, FeCl3 and FeCl3 + NaOH were used as modifying agents. Several important parameters influencing the adsorption of As(III) ions such as contact time, pH, temperature and initial metal concentration were investigated following batch experiments. From the results, it is indicated that temperature 20°C and solution pH = 9.0 are the optimum conditions for adsorption. Maximum adsorption experimental capacities of HS that was treated with FeCl3 and FeCl3 + NaOH were 4.37 and 11.84 mg g-1 for arsenic, respectively. The adsorption data at optimum conditions were analyzed by Freundlich, Langmuir, Dubinin-Radushkevich and Temkin isotherm models, and it was found that Freundlich isotherm model gives better fit. Thermodynamic parameters such as enthalpy change (ΔH°), entropy change (ΔS°) and free energy change (ΔG°) were also calculated. These results were indicated that the adsorption of arsenic on HS is exothermic and proceeds spontaneously. Additionally, it can be said that these adsorptions are physical because the Gibbs free energy change (ΔG°) for both adsorbents were found lower than 20 kJ mol-1. © 2017 Desalination Publications. All rights reserved.
dc.identifier.DOI-ID10.5004/dwt.2017.20725
dc.identifier.issn19443994
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/15418
dc.language.isoEnglish
dc.publisherDesalination Publications
dc.subjectCorylus
dc.subjectadsorption
dc.subjectaqueous solution
dc.subjectarsenic
dc.subjection
dc.subjectnut
dc.subjectpollutant removal
dc.subjectshell
dc.titleRemoval of arsenic(III) ions from aqueous solutions by modified hazelnut shell
dc.typeArticle

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