Abstract
The adsorption of crystal violet on red mud modified by sodium dodecylbenzene sulfonate (SDBS) was studied. The effect of the dosage of modified red mud on crystal violet adsorption was investigated. The results of kinetics and thermodynamics experiments showed that the adsorption of crystal violet by adsorbent fitted with the pseudo-second-order adsorption kinetic model better. The adsorption of crystal violet on modified red mud could be described by Langmuir and Freundlich models, and the adsorption was better in accordance with Freundlich isothermal adsorption model. According to the Langmuir adsorption model, the maximum adsorption capacity of adsorbent was 38.16mg/g at 303K.
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