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Type: Artigo de evento
Title: Thermodynamic Data For Divalent Cations Onto New Modified Glycidoxy Silica Surface At Solid/liquid Interface
Author: Sales J.A.A.
Prado A.G.S.
Airoldi C.
Abstract: Ethylenediamine molecule was chemically bonded on a silica gel surface previously anchored with 3-glycidoxypropyltrimethoxysilane. This new surface was employed to adsorb divalent cation from aqueous solutions at 2987±1 K. The series of adsorption isotherms were adjusted to a modified Langmuir equation from data obtained by suspending the solid with MCl2 (M = Cu, NJ, Zn and Co) solutions, which gave the maximum number of moles adsorbed as 1.54, 0.56, 0.45 and 0.36 mmol g-1 for Cu, Ni, Co and Zn, respectively. Suspended aliquots of the chemically modified surface were calorimetrically titrated and the thermodynamic data showed the system is favored enthalpically and by free Gibbs energy.
Rights: fechado
Identifier DOI: 10.1023/A:1020657717833
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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