title: Modeling the adsorption kinetics of some priority organic pollutants in water from diffusion and activation energy parameters.
abstract: The kinetic aspects of adsorption of some priority organic pollutants, viz., phenol (hydroxybenzene), o-hydroxyphenol (1,2-dihydroxybenzene), m-hydroxyphenol (1,3-dihydroxybenzene), and 4-nitrophenol (1-hydroxy-4-nitrobenzene), on fly ash have been studied. The process is found to be of complex nature consisting of both surface adsorption and pore diffusion, the extent being estimated from the diffusion coefficient value. Activation parameter data for the ultimate adsorption as well as the pore diffusion are also evaluated. The data indicate that in the studied solute concentration range, external transport mainly governs the rate-limiting process.
authors.affiliation: Department of Chemistry, University of Kalyani, Kalyani 741235, West Bengal, India. mitalo@klyuniv.ernet.in
authors.forename: Mitali
authors.initials: M
authors.lastname: Sarkar
authors.forename: Pradip Kumar
authors.initials: PK
authors.lastname: Acharya
authors.forename: Bhaskar
authors.initials: B
authors.lastname: Bhattacharya
mesh_terms: D004058:Diffusion; D007700:Kinetics; D008956:Models, Chemical; D009930:Organic Chemicals / Q000737:chemistry*; D013816:Thermodynamics; D014874:Water Pollutants, Chemical
chemical_list: D009930:Organic Chemicals; D014874:Water Pollutants, Chemical