Thermodynamics of adsorption of acetone on active carbon supported metal adsorbents

Sulphuric acid-modified bagasse has been used as low-cost adsorbent for the removal of methylene blue (MB) dye from aqueous solution. In order to remove organic compounds that contribute to chemical oxygen demand (COD), pretreatment with thorough washing of adsorbent using boiling distilled water was performed instead of conventional washing using distilled water at room temperature only. This has resulted in the highest efficiency of color removal of 99.45% and COD reduction of 99.36% for MB dye solution at pH 9. Effects of initial pH, dye concentration, adsorbent dosage, temperature, and contact time have been studied. The adsorption of MB dye was pH dependent. Langmuir and Freundlich isotherm models were tested on the adsorption data. The kinetic experimental data were analyzed using pseudo-first order, pseudo-second order, and the intraparticle diffusion model in order to examine the adsorption mechanisms. The adsorption process followed the Langmuir isotherm as well as the Freundlich isotherm and pseudosecond-order kinetic model. The process was found to be endothermic in nature.

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“…In order to fully understand the nature of adsorption, the thermodynamic studies play an important role. This paper also presents the thermodynamics parameters related to the adsorption of dyes such as free energy change ( G), enthalpy change ( H) and entropy change ( S), which have been calculated using following equations [24][25][26][27]:…”

Section: Introductionmentioning

confidence: 99%

Adsorption of dyes from aqueous solutions on activated charcoal

Iqbal

Ashiq

2007

Journal of Hazardous Materials

470

178

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Thermodynamics of adsorption of acetone on active carbon supported metal adsorbents

Cited by 12 publications

References 32 publications

Equilibrium, thermodynamics and process design to minimize adsorbent amount for the adsorption of acid dyes onto cationic polymer-loaded bentonite

Equilibrium, thermodynamics and process design to minimize adsorbent amount for the adsorption of acid dyes onto cationic polymer-loaded bentonite

A Novel Pretreatment Method of Lignocellulosic Material as Adsorbent and Kinetic Study of Dye Waste Adsorption

Adsorption of dyes from aqueous solutions on activated charcoal

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