an efficient removal of methyl green dye by adsorption onto new modified chitosan schiff base

new modified chitosan schiff base (ep-cs-sb) composite was prepared from the reaction of chitosan, epichlorohydrin and trans-cinnamaldehyde (molar ratio 1:1:1) and characterized by fourier-transform infrared spectroscopy (ft-ir), ultraviolet–visible spectroscopy (uv-vis), thermogravimetry and differential thermal analysis (tg-dta), differential scanning calorimetry (dsc), x-ray diffraction (xrd) and scanning electron microscope (sem) analysis. it was applied as a new adsorbent for removal of methyl green (mg) dye. the effects of different significant parameters, such as ph solution (2-10), adsorbent dosage (0.005, 0.01 and 0.02 g) and contact time (0 – 120 min) were explored. results show that the adsorption process was depended on ph solution. the highest adsorption capacity of ep-cs-sb was obtained 98.47% at ph =8, 120 min, and 0.02 g of ep-cs-sb. ep-cs-sb was found to be a suitable candidate for removal of cationic dye.