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PREPARATION AND ADSORPTION OF THIOUREA MODIFIED GLUTARALDEHYDE-CROSSLINKED CHITOSAN RESINS |
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| Authors: | BAI Linshan WEN Xiangyue FENG Changgen REN Qisheng |
| Affiliation: | 1. School of Chemistry and Chemical Engineering Anhui University of Technology, Maanshan 243002, China 2. Center of Research and Development for New Pharmaceuticals Beijing Institute of Technology, Beijing 100081, China 3. Beijing Jiangzhong Institute of Pharmaceuticals, Beijing 100050, China |
| Abstract: | 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 ( 1 cm×10 cm)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. |
| Keywords: | Chitosan Thiourea Cyanuric chloride Glutaraldehyde Adsorption |
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