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Adsorption Properties of Reactive Brilliant Red X-3B, Reactive Light Yellow K-6G and Reactive Brilliant Blue X-BR on Ethylenediamine-Modified Magnetic Chitosan Microspheres

Ethylenediamine-modified magnetic chitosan microspheres (EMCS) were prepared and used for the adsorption of Reactive Brilliant Red X-3B (RBR), Reactive Light Yellow K-6G (RLY) and Reactive Brilliant Blue X-BR (RBB). The EMCS has good adsorption performance for RBR and RLY. When the pH was 5.3 and 5.8 at 298K, initial concentration was 200mg/L, the adsorption capacity for RBR and RLY reached 98% and the maximum adsorption quantity achieve 198.99 and 122.2mg/g respective. The adsorption capacity of RBB on EMCS was unideal (<10%). The adsorption isotherm of RBR was fitted by both Langmuir and Freundlich equation, and the adsorption isotherm of RLY turned out to be more agree with Langmuir equation. The adsorption process follows a pseudo-second-order kinetic model for both RBR and RLY.