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% appar...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 HCI 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.展开更多
基金Project Supported by: The Natural Science Foundation of Anhui Educational Committee (No. 2004kj066)
文摘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 HCI 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.