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Adsorption of Cd(II) ions from aqueous solutions using activated carbon prepared from olive stone by ZnCl2 activation.
Bioresour Technol. 2008 Feb; 99(3):492-501.BT

Abstract

This 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 (ZnCl(2)) 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 (DeltaG(0)), standard enthalpy (DeltaH(0)), standard entropy (DeltaS(0)) 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% ZnCl(2) solution was the best sample of the produced activated carbons from olive stone with the specific surface area of 790.25 m(2)g(-1). The results show that the produced activated carbon from olive stone is an alternative low-cost adsorbent for removing Cd(II).

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Authors+Show Affiliations

Kula I
Department of Chemistry, Faculty of Science and Arts, Middle East Technical University, Ankara 06561, Turkey.
Uğurlu M
No affiliation info available
Karaoğlu H
No affiliation info available
Celik A
No affiliation info available

MeSH

AdsorptionBiodegradation, EnvironmentalCadmiumCharcoalChloridesHydrogen-Ion ConcentrationIndustrial WasteKineticsMicroscopy, Electron, ScanningOleaSolutionsTemperatureThermodynamicsTime FactorsZinc Compounds

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17350829

Citation

Kula, Ibrahim, et al. "Adsorption of Cd(II) Ions From Aqueous Solutions Using Activated Carbon Prepared From Olive Stone By ZnCl2 Activation." Bioresource Technology, vol. 99, no. 3, 2008, pp. 492-501.
Kula I, Uğurlu M, Karaoğlu H, et al. Adsorption of Cd(II) ions from aqueous solutions using activated carbon prepared from olive stone by ZnCl2 activation. Bioresour Technol. 2008;99(3):492-501.
Kula, I., Uğurlu, M., Karaoğlu, H., & Celik, A. (2008). Adsorption of Cd(II) ions from aqueous solutions using activated carbon prepared from olive stone by ZnCl2 activation. Bioresource Technology, 99(3), 492-501.
Kula I, et al. Adsorption of Cd(II) Ions From Aqueous Solutions Using Activated Carbon Prepared From Olive Stone By ZnCl2 Activation. Bioresour Technol. 2008;99(3):492-501. PubMed PMID: 17350829.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption of Cd(II) ions from aqueous solutions using activated carbon prepared from olive stone by ZnCl2 activation. AU - Kula,Ibrahim, AU - Uğurlu,Mehmet, AU - Karaoğlu,Hamdi, AU - Celik,Ali, Y1 - 2007/03/12/ PY - 2006/07/13/received PY - 2007/01/16/revised PY - 2007/01/16/accepted PY - 2007/3/14/pubmed PY - 2008/1/17/medline PY - 2007/3/14/entrez SP - 492 EP - 501 JF - Bioresource technology JO - Bioresour Technol VL - 99 IS - 3 N2 - This 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 (ZnCl(2)) 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 (DeltaG(0)), standard enthalpy (DeltaH(0)), standard entropy (DeltaS(0)) 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% ZnCl(2) solution was the best sample of the produced activated carbons from olive stone with the specific surface area of 790.25 m(2)g(-1). The results show that the produced activated carbon from olive stone is an alternative low-cost adsorbent for removing Cd(II). SN - 0960-8524 UR - https://www.unboundmedicine.com/medline/citation/17350829/Adsorption_of_Cd_II__ions_from_aqueous_solutions_using_activated_carbon_prepared_from_olive_stone_by_ZnCl2_activation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0960-8524(07)00082-X DB - PRIME DP - Unbound Medicine ER -