Adsorption of Cd(II) ions from aqueous solutions using activated carbon prepared from olive stone by ZnCl2 activation

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dc.contributor.authorKula I.
dc.contributor.authorUǧurlu M.
dc.contributor.authorKaraoǧlu H.
dc.contributor.authorÇelik A.
dc.date.accessioned2024-07-22T08:22:31Z
dc.date.available2024-07-22T08:22:31Z
dc.date.issued2008
dc.description.abstractThis study is aimed to remove Cd(II) ions from aqueous solutions by adsorption. As adsorbent, activated carbon prepared from olive stone, an agricultural solid by-product was used. Different activating agent (ZnCl2) amounts and adsorbent particle size were studied to optimize adsorbent surface area. The adsorption experiments were conducted at different parameters such as, adsorbent dose, temperature, equilibrium time and pH. According to the experiments results, the equilibrium time, optimum pH, adsorbent dosage were found 60 min, pH > 6 and 1.0 g/50 ml respectively. The kinetic data supports pseudo-second order model and intra-particle model but shows very poor fit for pseudo-first order model. Adsorption isotherms were obtained from three different temperatures. These adsorption data were fitted with the Langmuir and Freundlich isotherms. In addition, the thermodynamic parameters, standard free energy (ΔG0), standard enthalpy (ΔH0), standard entropy (ΔS0) of the adsorption process were calculated. To reveal the adsorptive characteristics of the produced active carbon, BET surface area measurements were made. Structural analysis was performed using SEM-EDS. The resulting activated carbons with 20% ZnCl2 solution was the best sample of the produced activated carbons from olive stone with the specific surface area of 790.25 m2 g-1. The results show that the produced activated carbon from olive stone is an alternative low-cost adsorbent for removing Cd(II). © 2007 Elsevier Ltd. All rights reserved.
dc.identifier.DOI-ID10.1016/j.biortech.2007.01.015
dc.identifier.issn09608524
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/19117
dc.language.isoEnglish
dc.subjectAdsorption
dc.subjectBiodegradation, Environmental
dc.subjectCadmium
dc.subjectCharcoal
dc.subjectChlorides
dc.subjectHydrogen-Ion Concentration
dc.subjectIndustrial Waste
dc.subjectKinetics
dc.subjectMicroscopy, Electron, Scanning
dc.subjectOlea
dc.subjectSolutions
dc.subjectTemperature
dc.subjectThermodynamics
dc.subjectTime Factors
dc.subjectZinc Compounds
dc.subjectAdsorption
dc.subjectCadmium
dc.subjectpH effects
dc.subjectSolutions
dc.subjectZinc compounds
dc.subjectAdsorption
dc.subjectpH effects
dc.subjectSolutions
dc.subjectZinc compounds
dc.subjectactivated carbon
dc.subjectcadmium
dc.subjectolive oil
dc.subjectolive stone
dc.subjectunclassified drug
dc.subjectzinc chloride
dc.subjectCadmium(II) ions
dc.subjectChemically prepared activated carbons
dc.subjectKinetic equations
dc.subjectOlive stone
dc.subjectactivated carbon
dc.subjectadsorption
dc.subjectaqueous solution
dc.subjectcadmium
dc.subjectchloride
dc.subjectenthalpy
dc.subjectentropy
dc.subjectexperimental study
dc.subjectisotherm
dc.subjectmodel validation
dc.subjectparticle size
dc.subjectpH
dc.subjectreaction kinetics
dc.subjecttemperature profile
dc.subjectzinc
dc.subjectadsorption
dc.subjectaqueous solution
dc.subjectarticle
dc.subjectdosimetry
dc.subjectenergy
dc.subjectenthalpy
dc.subjectentropy
dc.subjectfreundlich isotherm
dc.subjectheavy metal removal
dc.subjectisotherm
dc.subjectkinetics
dc.subjectlangmuir isotherm
dc.subjectparticle size
dc.subjectpH
dc.subjectpriority journal
dc.subjectstructure analysis
dc.subjecttemperature
dc.subjectthermodynamics
dc.subjecttime
dc.subjectCadmium
dc.titleAdsorption of Cd(II) ions from aqueous solutions using activated carbon prepared from olive stone by ZnCl2 activation
dc.typeArticle

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