物理化学学报 >> 1989, Vol. 5 >> Issue (05): 600-603.doi: 10.3866/PKU.WHXB19890519

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氨基葡聚糖对水溶液中铜离子的吸附与脱附

庄公惠; Wightman James P.   

  1. 天津大学化学系; Chemistry; Department; Virginia; Tech.; U.S.A.
  • 收稿日期:1988-04-21 修回日期:1988-11-12 发布日期:1989-10-15
  • 通讯作者: 庄公惠

THE UPTAKE OF Cu(Ⅱ) ON CHITOSAIN FROM AQUEOUS SOLUTION AND ITS DESORPTION

Zhuang Gonghui*; Wightman; James P.   

  1. Chemistry Department; Tianjin University; Chemistry Department; Virginia Tech.; U. S. A.
  • Received:1988-04-21 Revised:1988-11-12 Published:1989-10-15
  • Contact: Zhuang Gonghui

Abstract: The uptake of Cu(Ⅱ) on chitosan is corresponding to the monolayer adsorption model at 30.0℃ and the equilibrium concentration of Cu(Ⅱ) is less than 61.1 mg dm~(-3). When the pH values are 6.00 and 4.88 respectively, the saturated specific adsorption amounts are kept constant, 26.5 mg·g~(-1), but the adsorption constants are dropped down from 0.202 to 0.0491 dm~3·mg~(-1). It means that an acidized solution may cause the desorption of Cu(Ⅱ) from chitosan uptaken the ions before. Chitosan is very stable at pH~2 by using a 2.5 mol·dm~(-3) acidized NaCl solution because the ionic strength of solution is high enough to prevent the swelling of chitosan. The effect of pH of 0.2 mol·dm~(-3) acidized NaCl solutions on the desorption percentage of Cu(II) from samples used is determined, and the desorption percentage is found to be 81.5% when pH is 3.87.