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The preparation and adsorption of thiourea modified glutaraldehyde-crosslinked chitosan resin (Thio-chitosan) using cyanuric chloride as activator was studied. The adsorptive capacity of thio-chitosan with 15% apparent degree of crosslinking (DC, mass ration of glutaraldehyde to chitosan) to Cu(II) was 160mg/g (dry weight). The adsorption of Cu(II) was correlated with Freundlich and Langmuir isotherm equation. Cu(II) adsorbed on thio-chitosan column (1cm×10cm) was eluted with 0.5mol/L H2SO4, 6mol/L HCl and 3% thiourea solution with the recovery of 88.3%, 86.1% and 95.3%, respectively. The thio-chitosan resin can be applied to the separation and recovery of metal ions.
The preparation and adsorption of thiourea modified glutaraldehyde-crosslinked chitosan resin (Thio-chitosan) using cyanuric chloride as activator was studied. The adsorption capacity of thio-chitosan with 15% apparent degree of crosslinking (DC, mass ration of glutaraldehyde to chitosan) to Cu (II) was 160 mg / g (dry weight). The adsorption of Cu (II) was correlated with Freundlich and Langmuir isotherm equation. L H2SO4, 6 mol / L HCl and 3% thiourea solution with the recovery of 88.3%, 86.1% and 95.3%, respectively. The thio-chitosan resin can be applied to the separation and recovery of metal ions.