By propylene acylation crosslinked chitosan microspheres (AGCS) reacting with ethylenediamine

the ethylenediaminepropionyl crosslinked chitosan microspheres (EAGCS) with an abundant of amine groups were prepared. The structure of EAGCS was characterized by Fourier transform infrared spectroscopy (FT-IR)

X-ray photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD) respectively. The particle size was identified by laser particle size analyzer. The effects of the pH

temperature

concentration and EAGCS dosage of methyl orange(MO) solution on adsorption performance were also investigated systematically. The results show that the structure of EAGCS with spherical morphology consistents with expected design structure

the volume average particle size of EAGCS is 57.4 μm and the particle size distribution coefficient is 1.53. It's also found that the highest adsorption capacity and highest removal rate are up to 545.40 mg·g-1 and 99.6% respectively under the optimal conditions. Furthermore

the adsorption thermodynamics studies indicate that the adsorption is a spontaneous as well as exothermic process

also the kinetic and isothermal adsorption model studies suggest that this adsorption kinetics is pseudo-second-order

which is fit to Langmuir and Freundlich isothermal adsorption model.