Overall adsorption rate of metronidazole, dimetridazole and diatrizoate on activated carbons prepared from coffee residues and almond shells.

Abstract:

:This study analyzed the overall adsorption rate of metronidazole, dimetridazole, and diatrizoate on activated carbons prepared from coffee residues and almond shells. It was also elucidated whether the overall adsorption rate was controlled by reaction on the adsorbent surface or by intraparticle diffusion. Experimental data of the pollutant concentration decay curves as a function of contact time were interpreted by kinetics (first- and second-order) and diffusion models, considering external mass transfer, surface and/or pore volume diffusion, and adsorption on an active site. The experimental data were better interpreted by a first-order than second-order kinetic model, and the first-order adsorption rate constant varied linearly with respect to the surface area and total pore volume of the adsorbents. According to the diffusion model, the overall adsorption rate is governed by intraparticle diffusion, and surface diffusion is the main mechanism controlling the intraparticle diffusion, representing >90% of total intraparticle diffusion.

journal_name

J Environ Manage

authors

Flores-Cano JV,Sánchez-Polo M,Messoud J,Velo-Gala I,Ocampo-Pérez R,Rivera-Utrilla J

doi

10.1016/j.jenvman.2015.12.001

subject

Has Abstract

pub_date

2016-03-15 00:00:00

pages

116-25

eissn

0301-4797

issn

1095-8630

pii

S0301-4797(15)30417-5

journal_volume

169

pub_type

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