Template synthesis and adsorption properties of chitosan salicylal Schiff bases

To improve the adsorption properties of chemically modified chitosan, the chelating resin of salicylal chitosan Schiff bases was prepared by the template cross-linking method using Cu(II) as template ion and ethylene glycol bisglycidyl ether as cross-linking agent in microwave, and was characterized by IR. The adsorption capacity and selectivity coefficient of the chemically modified chitosan for Cu(II), Fe(III) and Zn(II) were investigated, respectively. The results show that the adsorption capacity of the resin 2.73 mmol/g for Cu(II) is bigger than that for other two metal ions, 0.22 mmol/g for Fe(III), and 0.42 mmol/g for Zn(II), and the selectivity coefficients are as follows: KCu(II)/Fe(III)=12.4, KCu(II)/Zn(II)=6.5.