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   TWO-PARAMETER ISOTHERMS OF METHYL ORANGE SORPTION BY PINECONE DERIVED ACTIVATED CARBON  
   
نویسنده Samarghandi M.R ,Hadi M. ,Moayedi S. ,Barjasteh Askari F.
منبع journal of environmental health science and engineering - 2009 - دوره : 6 - شماره : 4 - صفحه:285 -294
چکیده    The adsorption of a mono azo dye methyl-orange (meo) onto granular pinecone derived activated carbon (gpac), from aqueous solutions, was studied in a batch system. seven two-parameter isotherm models of langmuir, freundlich, dubinin-radushkevic, temkin, halsey, jovanovic and hurkins-jura were used to fit the experimental data. the results revealed that the adsorption isotherm models fitted the data in the order of jovanovic (x2=1.374) > langmuir > dubinin-radushkevic > temkin > freundlich > halsey > hurkins-jura isotherms. adsorption isotherms modeling showed that the interaction of dye with activated carbon surface is localized monolayer adsorption. a comparison of kinetic models was evaluated for the pseudo-second order, elovich and lagergren kinetic models. lagergren first order model was found to agree well with the experimental data (x2=9.231). in order to determine the best-fit isotherm and kinetic models, two error analysis methods of residual mean square error and chi-square statistic (x2) were used to evaluate the data.
کلیدواژه Adsorption isotherms ,Methyl orange ,Kinetic models ,Activated carbon
آدرس hamadan university of medical sciences, School of Public Health and Center for Health Research, Department of Environmental Health Engineering, ایران, hamadan university of medical sciences, School of Public Health and Center for Health Research, Department of Environmental Health Engineering, ایران, hamadan university of medical sciences, School of Public Health and Center for Health Research, Department of Environmental Health Engineering, ایران
پست الکترونیکی hadi_mfr@yahoo.com
 
     
   
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