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Kinetic analysis of phenol adsorption from aqueous systems
Author(s) -
Mijangos Federico,
Navarro Ana,
Jodra Yolanda
Publication year - 2001
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450790506
Subject(s) - adsorption , diffusion , aqueous solution , chemistry , phenol , kinetics , kinetic energy , thermodynamics , aqueous two phase system , diffusion process , surface diffusion , chromatography , organic chemistry , knowledge management , physics , innovation diffusion , quantum mechanics , computer science
The kinetic adsorption of mixtures of phenolic compounds onto a polymeric adsorbent from aqueous solutions was studied. Experimental data for single‐component solutions were obtained and fitted to a parallel diffusion model. Effective diffusion coefficients were related to liquid‐phase diffusion and surface diffusion. The effect of solute concentration and salinity on these parameters was also analysed. Van Laar's equation is proposed to evaluate the influence of concentration on diffusion. The adsorption kinetics for phenol and pcresol mixtures at different initial concentration ratios were determined and correctly adjusted to the mentioned kinetic model. Results confirm that adsorption from multicomponent aqueous solutions is a surface diffusion‐controlled process.