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Removal of phenol from aqueous solutions by adsorption onto organomodified Tirebolu bentonite: equilibrium, kinetic and thermodynamic study.
J Hazard Mater. 2009 Dec 15; 172(1):353-62.JH

Abstract

A natural bentonite modified with a cationic surfactant, cetyl trimethylammonium bromide (CTAB), was used as an adsorbent for removal of phenol from aqueous solutions. The natural and modified bentonites (organobentonite) were characterized with some instrumental techniques (FTIR, XRD and SEM). Adsorption studies were performed in a batch system, and the effects of various experimental parameters such as solution pH, contact time, initial phenol concentration, organobentonite concentration, and temperature, etc. were evaluated upon the phenol adsorption onto organobentonite. Maximum phenol removal was observed at pH 9.0. Equilibrium was attained after contact of 1h only. The adsorption isotherms were described by Langmuir and Freundlich isotherm models, and both model fitted well. The monolayer adsorption capacity of organobentonite was found to be 333 mg g(-1). Desorption of phenol from the loaded adsorbent was achieved by using 20% acetone solution. The kinetic studies indicated that the adsorption process was best described by the pseudo-second-order kinetics (R(2) > 0.99). Thermodynamic parameters including the Gibbs free energy (DeltaG degrees), enthalpy (DeltaH degrees), and entropy (DeltaS degrees) were also calculated. These parameters indicated that adsorption of phenol onto organobentonite was feasible, spontaneous and exothermic in the temperature range of 0-40 degrees C.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Senturk HB
Department of Chemistry, Karadeniz Technical University, Faculty of Arts & Sciences, 61080 Trabzon, Turkey.
Ozdes D
No affiliation info available
Gundogdu A
No affiliation info available
Duran C
No affiliation info available
Soylak M
No affiliation info available

MeSH

AdsorptionBentoniteCetrimoniumCetrimonium CompoundsHydrogen-Ion ConcentrationKineticsMicroscopy, Electron, ScanningPhenolSpectrophotometrySpectroscopy, Fourier Transform InfraredTemperatureThermodynamicsTime FactorsWater Pollutants, ChemicalWater PurificationX-Ray Diffraction

Pub Type(s)

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

Language

eng

PubMed ID

19656623

Citation

Senturk, Hasan Basri, et al. "Removal of Phenol From Aqueous Solutions By Adsorption Onto Organomodified Tirebolu Bentonite: Equilibrium, Kinetic and Thermodynamic Study." Journal of Hazardous Materials, vol. 172, no. 1, 2009, pp. 353-62.
Senturk HB, Ozdes D, Gundogdu A, et al. Removal of phenol from aqueous solutions by adsorption onto organomodified Tirebolu bentonite: equilibrium, kinetic and thermodynamic study. J Hazard Mater. 2009;172(1):353-62.
Senturk, H. B., Ozdes, D., Gundogdu, A., Duran, C., & Soylak, M. (2009). Removal of phenol from aqueous solutions by adsorption onto organomodified Tirebolu bentonite: equilibrium, kinetic and thermodynamic study. Journal of Hazardous Materials, 172(1), 353-62. https://doi.org/10.1016/j.jhazmat.2009.07.019
Senturk HB, et al. Removal of Phenol From Aqueous Solutions By Adsorption Onto Organomodified Tirebolu Bentonite: Equilibrium, Kinetic and Thermodynamic Study. J Hazard Mater. 2009 Dec 15;172(1):353-62. PubMed PMID: 19656623.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of phenol from aqueous solutions by adsorption onto organomodified Tirebolu bentonite: equilibrium, kinetic and thermodynamic study. AU - Senturk,Hasan Basri, AU - Ozdes,Duygu, AU - Gundogdu,Ali, AU - Duran,Celal, AU - Soylak,Mustafa, Y1 - 2009/07/14/ PY - 2009/04/23/received PY - 2009/06/26/revised PY - 2009/07/03/accepted PY - 2009/8/7/entrez PY - 2009/8/7/pubmed PY - 2010/1/13/medline SP - 353 EP - 62 JF - Journal of hazardous materials JO - J Hazard Mater VL - 172 IS - 1 N2 - A natural bentonite modified with a cationic surfactant, cetyl trimethylammonium bromide (CTAB), was used as an adsorbent for removal of phenol from aqueous solutions. The natural and modified bentonites (organobentonite) were characterized with some instrumental techniques (FTIR, XRD and SEM). Adsorption studies were performed in a batch system, and the effects of various experimental parameters such as solution pH, contact time, initial phenol concentration, organobentonite concentration, and temperature, etc. were evaluated upon the phenol adsorption onto organobentonite. Maximum phenol removal was observed at pH 9.0. Equilibrium was attained after contact of 1h only. The adsorption isotherms were described by Langmuir and Freundlich isotherm models, and both model fitted well. The monolayer adsorption capacity of organobentonite was found to be 333 mg g(-1). Desorption of phenol from the loaded adsorbent was achieved by using 20% acetone solution. The kinetic studies indicated that the adsorption process was best described by the pseudo-second-order kinetics (R(2) > 0.99). Thermodynamic parameters including the Gibbs free energy (DeltaG degrees), enthalpy (DeltaH degrees), and entropy (DeltaS degrees) were also calculated. These parameters indicated that adsorption of phenol onto organobentonite was feasible, spontaneous and exothermic in the temperature range of 0-40 degrees C. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19656623/Removal_of_phenol_from_aqueous_solutions_by_adsorption_onto_organomodified_Tirebolu_bentonite:_equilibrium_kinetic_and_thermodynamic_study_ DB - PRIME DP - Unbound Medicine ER -