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유창규,G. Vijaya Kumar,P. Ramalingam,Min Jung Kim,M. Dharmendira Kumar 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.5
Experimental studies and biosorption kinetics of an intraparticle diffusion model for acid dye removal using a musa spp. waste sorbent were carried out to find the removal effects and dynamics of various operating parameters,such as initial dye concentration, sorbent dosage, pH and temperature. Experimental data were modeled with kinetic models and two biosorption isotherms of intraparticle diffusion models as well as the physiochemical data of sorbents characterized by SEM and FT-IR. Kinetic studies showed that the sorption process follows second-order rate kinetics with an average rate constant of 0.0018675 (g/mg·min). Thermodynamic parameters such as entropy of biosorption (ΔS0), enthalpy of biosorption (ΔH0) and Gibbs free energy of biosorption (ΔG0) were obtained and analyzed. Sorbent,musa spp. waste (banana peel) was characterized by FTIR and SEM. The results showed that musa spp. waste can be considered as potential sorbent for the sorption of acid violet 54 from dilute aqueous solution.
Kim, Jeong Tai,Kim, Heecheul,Kim, Sun-Kuk,Kumar, M. Dharmendira,Prabu, Arun Anand American Chemical Society 2012 Journal of chemical and engineering data Vol.57 No.1
<P>In this work, the effect of two dissolved inorganic salts (cadmium chloride, CdCl<SUB>2</SUB>; ammonium chloride, NH<SUB>4</SUB>Cl) on the enthalpy of mixing (<I>H</I><SUP>E</SUP>) of the pyridine + water binary system measured at 303.15 K using an isothermal displacement calorimeter with vapor space is investigated. Compared with the salt-free system, the addition (0.05 mass fraction) of the salts altered the magnitude of <I>H</I><SUP>E</SUP> values to some extent depending on the mole fraction of <I>x</I><SUB>1</SUB>. The importance of the solute–solvent and solvent–solvent interactions was demonstrated from the increasing exothermic <I>H</I><SUP>E</SUP> values with increasing salt concentration (0.10 mass fraction). The experimental values of <I>H</I><SUP>E</SUP> were fitted into the Redlich–Kister polynomial, and the adjustable parameters obtained by the least-squares method are reported.</P>