Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 169, Issue 1-3, Pages 912-918Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2009.04.034
Keywords
Adsorption; Atrazine; Carbon nanotubes; Kinetics; Thermodynamics
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Funding
- National Natural Science Foundation of China [20707037]
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The adsorption kinetics, isotherms and thermodynamic of atrazine on multiwalled carbon nanotubes (MWCNTs) containing 0.85%, 2.16%, and 7.07% oxygen was studied. Kinetic analyses were performed using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The regression results showed that the pseudo-second-order law fit the adsorption kinetics. The calculated thermodynamic parameters indicated that adsorption of atrazine on MWCNTs was spontaneous and exothermic. Standard free energy (Delta G(0)) became less negative when the oxygen content of MWCNTs increased from 0.85% to 7.07% which is consistent with the low adsorption affinity of MWCNTs for atrazine. (c) 2009 Elsevier B.V. All rights reserved.
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