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Removal of ammonium ion from aqueous solution using natural Turkish clinoptilolite.
J Hazard Mater. 2006 Aug 25; 136(3):604-9.JH

Abstract

A study on ion exchange kinetics and equilibrium isotherms of ammonium ion on natural Turkish clinoptilolite (zeolite) was conducted using a batch experiment technique. The effects of relevant parameters, such as temperature, contact time and initial ammonium (NH(4)(+)) concentration were examined, respectively. The pseudo first-order, pseudo second-order kinetic models and intraparticle diffusion model were used to describe the kinetic data. The pseudo second-order kinetic model provided excellent kinetic data fitting (R(2)>0.990) and intraparticle diffusion effects ammonium uptake. The Langmuir and Freundlich models were applied to describe the equilibrium isotherms for ammonium uptake and the Langmuir model agrees very well with experimental data. Thermodynamic parameters such as change in free energy (DeltaG(0)), enthalpy (DeltaH(0)) and entropy (DeltaS(0)) were also determined. An examination of the thermodynamic parameters shows that the exchange of ammonium ion by clinoptilolite is a process occurring spontaneously and physical in nature at ambient conditions (25 degrees C). The process is also found to be exothermic. The results indicate that there is a significant potential for the natural Turkish clinoptilolite as an adsorbent material for ammonium removal from aqueous solutions.

Authors+Show Affiliations

Karadag D
Yildiz Technical University, Civil Engineering Faculty, Environmental Engineering Department, 34349 Besiktas, Istanbul, Turkey. dkaradag@yildiz.edu.tr
Koc Y
No affiliation info available
Turan M
No affiliation info available
Armagan B
No affiliation info available

MeSH

KineticsQuaternary Ammonium CompoundsSolutionsTemperatureThermodynamicsTurkeyWaterZeolites

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16442711

Citation

Karadag, Doğan, et al. "Removal of Ammonium Ion From Aqueous Solution Using Natural Turkish Clinoptilolite." Journal of Hazardous Materials, vol. 136, no. 3, 2006, pp. 604-9.
Karadag D, Koc Y, Turan M, et al. Removal of ammonium ion from aqueous solution using natural Turkish clinoptilolite. J Hazard Mater. 2006;136(3):604-9.
Karadag, D., Koc, Y., Turan, M., & Armagan, B. (2006). Removal of ammonium ion from aqueous solution using natural Turkish clinoptilolite. Journal of Hazardous Materials, 136(3), 604-9.
Karadag D, et al. Removal of Ammonium Ion From Aqueous Solution Using Natural Turkish Clinoptilolite. J Hazard Mater. 2006 Aug 25;136(3):604-9. PubMed PMID: 16442711.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of ammonium ion from aqueous solution using natural Turkish clinoptilolite. AU - Karadag,Doğan, AU - Koc,Yunus, AU - Turan,Mustafa, AU - Armagan,Bulent, Y1 - 2006/01/25/ PY - 2005/10/24/received PY - 2005/12/20/revised PY - 2005/12/21/accepted PY - 2006/1/31/pubmed PY - 2006/12/19/medline PY - 2006/1/31/entrez SP - 604 EP - 9 JF - Journal of hazardous materials JO - J Hazard Mater VL - 136 IS - 3 N2 - A study on ion exchange kinetics and equilibrium isotherms of ammonium ion on natural Turkish clinoptilolite (zeolite) was conducted using a batch experiment technique. The effects of relevant parameters, such as temperature, contact time and initial ammonium (NH(4)(+)) concentration were examined, respectively. The pseudo first-order, pseudo second-order kinetic models and intraparticle diffusion model were used to describe the kinetic data. The pseudo second-order kinetic model provided excellent kinetic data fitting (R(2)>0.990) and intraparticle diffusion effects ammonium uptake. The Langmuir and Freundlich models were applied to describe the equilibrium isotherms for ammonium uptake and the Langmuir model agrees very well with experimental data. Thermodynamic parameters such as change in free energy (DeltaG(0)), enthalpy (DeltaH(0)) and entropy (DeltaS(0)) were also determined. An examination of the thermodynamic parameters shows that the exchange of ammonium ion by clinoptilolite is a process occurring spontaneously and physical in nature at ambient conditions (25 degrees C). The process is also found to be exothermic. The results indicate that there is a significant potential for the natural Turkish clinoptilolite as an adsorbent material for ammonium removal from aqueous solutions. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/16442711/Removal_of_ammonium_ion_from_aqueous_solution_using_natural_Turkish_clinoptilolite_ DB - PRIME DP - Unbound Medicine ER -