AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN

The copper causes important health problems risk when it exists at high concentrations in drinking waters and daily feeds. Therefore, in this study, copper adsorption from solutions onto illite clay was investigated in batch mode as a function of the initial solution pH (3-6), temperature (30-60 °C)...

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Autores principales:	ALI FIL,BAYBARS, KORKMAZ,MUSTAFA, ÖZMETIN,GENGIZ
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2014
Materias:	Copper illite S-shaped isotherm thermodynamics empirical model
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000400012
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spelling	oai:scielo:S0717-970720140004000122015-01-09AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGNALI FIL,BAYBARSKORKMAZ,MUSTAFAÖZMETIN,GENGIZ Copper illite S-shaped isotherm thermodynamics empirical model The copper causes important health problems risk when it exists at high concentrations in drinking waters and daily feeds. Therefore, in this study, copper adsorption from solutions onto illite clay was investigated in batch mode as a function of the initial solution pH (3-6), temperature (30-60 °C) and ionic strength (0-0.1 mol/L-1 NaCl). The equilibrium was attained within 24 hours. Optimum conditions were determined as pH 6, temperature 60 °C and 0 mol/L-1 NaCl concentration. The isotherm data followed the S-class isotherm. The reason of this S-class isotherm was either solute-solute attractive forces at the surface causing cooperative adsorption or a competing reaction such as complexation with a ligand. Mathematically, the isotherm data were explained with the sum of several single Freundlich models. Also, the thermodynamic parameters of the process were calculated. Positive values of Gibbs free energy change (ΔGº) indicated that the adsorption process was unspontaneous. As the enthalpy change (ΔH°) had positive value for all the parameter intervals, copper adsorption was concluded to be physical and endothermic process. The positive entropy values indicated that the randomness at solid-liquid interface increased with concentration decrease. Maximum copper adsorption capacity of illite clay was calculated at 60 ºC as 1.823×10-5 mol/g. Furthermore, an empirical model was developed to determine the thermodynamic parameters of the process and operation conditions of the batch reactor as follows.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.59 n.4 20142014-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000400012en10.4067/S0717-97072014000400012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Copper illite S-shaped isotherm thermodynamics empirical model
spellingShingle	Copper illite S-shaped isotherm thermodynamics empirical model ALI FIL,BAYBARS KORKMAZ,MUSTAFA ÖZMETIN,GENGIZ AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN
description	The copper causes important health problems risk when it exists at high concentrations in drinking waters and daily feeds. Therefore, in this study, copper adsorption from solutions onto illite clay was investigated in batch mode as a function of the initial solution pH (3-6), temperature (30-60 °C) and ionic strength (0-0.1 mol/L-1 NaCl). The equilibrium was attained within 24 hours. Optimum conditions were determined as pH 6, temperature 60 °C and 0 mol/L-1 NaCl concentration. The isotherm data followed the S-class isotherm. The reason of this S-class isotherm was either solute-solute attractive forces at the surface causing cooperative adsorption or a competing reaction such as complexation with a ligand. Mathematically, the isotherm data were explained with the sum of several single Freundlich models. Also, the thermodynamic parameters of the process were calculated. Positive values of Gibbs free energy change (ΔGº) indicated that the adsorption process was unspontaneous. As the enthalpy change (ΔH°) had positive value for all the parameter intervals, copper adsorption was concluded to be physical and endothermic process. The positive entropy values indicated that the randomness at solid-liquid interface increased with concentration decrease. Maximum copper adsorption capacity of illite clay was calculated at 60 ºC as 1.823×10-5 mol/g. Furthermore, an empirical model was developed to determine the thermodynamic parameters of the process and operation conditions of the batch reactor as follows.
author	ALI FIL,BAYBARS KORKMAZ,MUSTAFA ÖZMETIN,GENGIZ
author_facet	ALI FIL,BAYBARS KORKMAZ,MUSTAFA ÖZMETIN,GENGIZ
author_sort	ALI FIL,BAYBARS
title	AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN
title_short	AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN
title_full	AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN
title_fullStr	AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN
title_full_unstemmed	AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN
title_sort	empirical model for adsorption thermodynamics of copper (ii) from solutions onto illite clay-batch process design
publisher	Sociedad Chilena de Química
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000400012
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AN EMPIRICAL MODEL FOR ADSORPTION THERMODYNAMICS OF COPPER (II) FROM SOLUTIONS ONTO ILLITE CLAY-BATCH PROCESS DESIGN

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