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Adsorption of basic dye on high-surface-area activated carbon prepared from coconut husk: equilibrium, kinetic and thermodynamic studies.
J Hazard Mater. 2008 Jun 15; 154(1-3):337-46.JH

Abstract

Adsorption isotherm and kinetics of methylene blue on activated carbon prepared from coconut husk were determined from batch tests. The effects of contact time (1-30 h), initial dye concentration (50-500 mg/l) and solution temperature (30-50 degrees C) were investigated. Equilibrium data were fitted to Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. The equilibrium data were best represented by Langmuir isotherm model, showing maximum monolayer adsorption capacity of 434.78 mg/g. The kinetic data were fitted to pseudo-first-order, pseudo-second-order and intraparticle diffusion models, and was found to follow closely the pseudo-second-order kinetic model. Thermodynamic parameters such as standard enthalpy (DeltaH degrees), standard entropy (DeltaS degrees) and standard free energy (DeltaG degrees) were evaluated. The adsorption interaction was found to be exothermic in nature. Coconut husk-based activated carbon was shown to be a promising adsorbent for removal of methylene blue from aqueous solutions.

Authors+Show Affiliations

Tan IA
School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia.
Ahmad AL
No affiliation info available
Hameed BH
No affiliation info available

MeSH

AdsorptionCarbonCocosColoring AgentsDiffusionKineticsMethylene BlueMicroscopy, Electron, ScanningPorositySurface PropertiesThermodynamicsWaste Disposal, FluidWater Pollutants, ChemicalWater Purification

Pub Type(s)

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

Language

eng

PubMed ID

18035483

Citation

Tan, I A W., et al. "Adsorption of Basic Dye On High-surface-area Activated Carbon Prepared From Coconut Husk: Equilibrium, Kinetic and Thermodynamic Studies." Journal of Hazardous Materials, vol. 154, no. 1-3, 2008, pp. 337-46.
Tan IA, Ahmad AL, Hameed BH. Adsorption of basic dye on high-surface-area activated carbon prepared from coconut husk: equilibrium, kinetic and thermodynamic studies. J Hazard Mater. 2008;154(1-3):337-46.
Tan, I. A., Ahmad, A. L., & Hameed, B. H. (2008). Adsorption of basic dye on high-surface-area activated carbon prepared from coconut husk: equilibrium, kinetic and thermodynamic studies. Journal of Hazardous Materials, 154(1-3), 337-46.
Tan IA, Ahmad AL, Hameed BH. Adsorption of Basic Dye On High-surface-area Activated Carbon Prepared From Coconut Husk: Equilibrium, Kinetic and Thermodynamic Studies. J Hazard Mater. 2008 Jun 15;154(1-3):337-46. PubMed PMID: 18035483.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption of basic dye on high-surface-area activated carbon prepared from coconut husk: equilibrium, kinetic and thermodynamic studies. AU - Tan,I A W, AU - Ahmad,A L, AU - Hameed,B H, Y1 - 2007/10/13/ PY - 2007/08/21/received PY - 2007/10/05/revised PY - 2007/10/08/accepted PY - 2007/11/24/pubmed PY - 2008/7/30/medline PY - 2007/11/24/entrez SP - 337 EP - 46 JF - Journal of hazardous materials JO - J Hazard Mater VL - 154 IS - 1-3 N2 - Adsorption isotherm and kinetics of methylene blue on activated carbon prepared from coconut husk were determined from batch tests. The effects of contact time (1-30 h), initial dye concentration (50-500 mg/l) and solution temperature (30-50 degrees C) were investigated. Equilibrium data were fitted to Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm models. The equilibrium data were best represented by Langmuir isotherm model, showing maximum monolayer adsorption capacity of 434.78 mg/g. The kinetic data were fitted to pseudo-first-order, pseudo-second-order and intraparticle diffusion models, and was found to follow closely the pseudo-second-order kinetic model. Thermodynamic parameters such as standard enthalpy (DeltaH degrees), standard entropy (DeltaS degrees) and standard free energy (DeltaG degrees) were evaluated. The adsorption interaction was found to be exothermic in nature. Coconut husk-based activated carbon was shown to be a promising adsorbent for removal of methylene blue from aqueous solutions. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18035483/Adsorption_of_basic_dye_on_high_surface_area_activated_carbon_prepared_from_coconut_husk:_equilibrium_kinetic_and_thermodynamic_studies_ DB - PRIME DP - Unbound Medicine ER -