Studying adsorption of methylene blue onto chitosan – mangetite composite

Quy Bui Minh, Oanh Do Thi, Vinh Nguyen Dinh, Linh Nguyen Thi Ngoc, Hoa Nguyen Thi Hong, Tung Vu Quang

Abstract


The chitosan/mangetite composite in the mass ratio chitosan:mangetite of 9:1 (CM91) was synthesised by co-precipitation method. The characteristics of the chitosan/mangetite composite was estimated by X-ray diffraction method (XRD) and scanning electron microscopy techniques (SEM). The methylene blue adsorption ability onto CM91 composite was well at value pH 9, equilibrium contact time of 20 minutes. The experimental adsorption data fitted into pseudo–Langmuir adsorption isotherm models. The adsorption followed pseudo-second order kinetic model very well. The maximum adsorption capacity of that composite which caculated by Langmuir equation was 94,18 mg/g.

Keywords


Methylene blue; Composite; Isotherm; kinetic; Adsorption

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DOI: https://doi.org/10.51316/jca.2022.009

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