Modeling of basic green 4 dynamic sorption onto granular organo–inorgano pillared clays (GOICs) in column reactor

In this study, the ability of organo–inorgano pillared clays to remove a dye (Malachite Green) was investigated. The effects of operating conditions, such as flow rate, initial dye concentration, GOICs particle size and bed height have been studied. Breakthrough data for BG4 removal (pH = 6, T = 25 °C) reveal that, the dynamic adsorption is significantly influenced by flow rate, initial dye concentration, GOICs particle size and bed height and a modification of these parameters can greatly influence the process efficiency. Dynamic behavior of the column was predicted with the combination of mass transfer model and Freundlich equation (Clark model). A good evaluation of Clark parameters versus operating parameters (concentration and velocity) is obtained and a generalization of the Clark model (C3BZ model) is proposed. It was found that the C3BZ model under the different conditions appeared able to well represent the adsorption of the BG4 onto GOICs.

► Comments about results and the effects of some parameters are added in the new text.
► Yoon and Nelson model is introduced for comparison with Clark Model.
► More information’s are give about experimental conditions.