Removal of Pyrethrin from Aqueous Effluents by Adsorptive Micellar Flocculation
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Date
2015-01-06
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Publisher
Hindawi Publishing Corporation
Abstract
The equilibrium adsorption of pyrethrin onto aggregates formed by the flocculation of micelles of the surfactant sodium dodecyl
sulphate (SDS) with aluminium sulphate is reported.The experimental results were analysed using different adsorption isotherms
(Langmuir, Freundlich, Redlich-Peterson, Sips, Radke-Prausnitz, Temkin, linear equilibrium, and the Dubin-Radushkevich
isotherms). The Freundlich and linear equilibrium isotherms best describe the adsorption of pyrethrin onto SDS micellar
flocs, with the Freundlich adsorption constant, 𝐾
𝐹, and the mass distribution coefficient, 𝐾
𝐷, of 64.266 ((mg/g)(L/mg)1/𝑛) and
119.65 L/g, respectively. Applicability of the Freundlich adsorption model suggests that heterogeneous surface adsorption affects
the adsorption. The mean free energy value estimated using the Dubinin-Radushkevich isotherm was 0.136 kJ/mol indicating that
physisorption may be predominant in the adsorption process.
Description
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords
Adsorptive Micellar Flocculation, Pyrethrin, Aqueous Effluents
Citation
Kuipa, P.K. and Kuipa, O., 2015. Removal of Pyrethrin from Aqueous Effluents by Adsorptive Micellar Flocculation. Journal of Chemistry, pp.1–6.