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The kinetics of sorption of basic dyes from aqueous solution by sphagnum moss peat

Authors

  • Y. S. Ho,

    1. The Department of Chemical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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  • G. Mckay

    Corresponding author
    1. The Department of Chemical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
    • The Department of Chemical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Abstract

The kinetics of sorption of three basic dyes, namely, Chrysoidine (BO2), Astrazon Blue (BB3) and Astrazone Blue (BB69) onto sphagnum moss peat have been investigated. The study focuses on the application of three sorption kinetic models for predicting the uptake of basic dyes. The sorption behaviour is found to be second order, based on the assumption of a pseudo-second order mechanism. The rate constant of sorption, the equilibrium capacity and initial sorption rate with the effect of various peat doses and initial dye concentrations have also been predicted.

Abstract

On a étudié les cinétiques de sorption de trois teintures de base, à savoir Chrysoidine (BO2), Astrazon Blue (BB3) et Astrazone Blue (BB69) sur une mousse de sphaigne. L'étude porte sur l'application de trois modèles cinétiques de sorption pour la prédiction de la consomation des teintures de base. On a trouvé que le comportement de sorption était du second ordre, en s'appuyant sur l'hypothèse d'un mécanisme de pseudo-second ordre. On a également prédit la constante de vitesse de sorption, la capacité d'équilibre et la vitesse de sorption initiale avec l'effet des diverses doses de tourbe et des concentrations de teintures initiales.

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