REMOVAL OF RHODAMINE B DYE FROM AQUEOUS SOLUTION  USING CHITOSAN – MAGNETITE COMPOSITE

Vũ Quang Tùng; Bùi Minh Quý

doi:10.34238/tnu-jst.5424

REMOVAL OF RHODAMINE B DYE FROM AQUEOUS SOLUTION USING CHITOSAN – MAGNETITE COMPOSITE

About this article

Received: 05/01/22 Revised: 19/04/22 Published: 21/04/22

Authors

1. Vu Quang Tung, TNU - University of Sciences
2. Bui Minh Quy , TNU - University of Sciences

Abstract

Chitosan-magnetite composite (CS-MNPs) was made by an in-situ combined co-precipitation method. Material characteristics were investigated by X-ray, SEM, BET, and VSM methods. CS-MNPs has a spherical shape with a diameter of around 20 nm and a surface area of 119.43 m²/g. Magnetic characteristic of the CS-MNPs has a good saturation magnetization of 36.5 emu/g. Adsorption of Rhodamine B dye (RhB) was studied through parameters such as solution pH, contact time, initial RhB concentration, and temperature. RhB adsorption kinetics onto CS-MNPs was described using a pseudo-second-order model. Adsorption isotherms were in agreement with Langmuir and Freundlich adsorption models. Maximum adsorption capacity decreased from 271.79 to 148.41 mg/g when temperature raised from 293 to 313K. Adsorption process is spontaneous, random and endothermic.

Keywords

Chitosan – magnetite; Rhodamine B dye; Kinetic; Isotherm; Thermodynamic

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DOI: https://doi.org/10.34238/tnu-jst.5424

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