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Citation: DING Chun-Mei, CHEN Ning-Sheng, LI Qian, ZHANG Zhi-Guo, QIAO Yong-Bo. Chelation Reaction of Chitosan to Ag(Ⅰ) and Chitosan Membrane with Ag(Ⅰ) as Template to Ag(Ⅰ)[J]. Chinese Journal of Applied Chemistry, ;2005, 22(3): 312-315. shu

Chelation Reaction of Chitosan to Ag(Ⅰ) and Chitosan Membrane with Ag(Ⅰ) as Template to Ag(Ⅰ)

1.
Department of Biochemistry, Anhui University of Science and Technology, Wuhu 241000

Corresponding author: DING Chun-Mei,
Received Date: 16 June 2004
Available Online: 22 October 2004
Fund Project: 安徽省教育厅自然科学基金重点项目(2003kj008zd) (2003kj008zd)

The chelation reactions of chitosan to Ag(Ⅰ) ions and chitosan membrane to Ag(Ⅰ) ions as template (CMAT) to Ag(Ⅰ) ions were studied comparatively.Their adsorption isothermal kinetic equations,lnc=k't were obtained via dc/dt=-kcⁿ linear correlation at 30~70℃.The apparent activati on energy of chitosan chelating to Ag(Ⅰ) ions and CMAT coordinating to Ag(Ⅰ) ions are 88.4 kJ/mol and 47.1 kJ/mol respectively.The chelating properties of CMAT to mixed ions (Pb(Ⅱ),Cu(Ⅱ),Ag(Ⅱ)) were also studied,and the experiment results show that CMAT has better selectivity and "memory" for Ag(Ⅰ).The chelation mechanism was studied by means of infrared spectrometry (IR) and X-ray photoelectron spectroscopy (XPS),the results indicate that the coordinating atom is not the O atom of the -OH but the N atom of the -NH₂ of chitosan.
- chitosan membrane,
- template coordination,
- Ag(I) ion,
- kinetic,
- chelation mechanism
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