应用化学 ›› 1994, Vol. 0 ›› Issue (1): 80-83.

• 研究论文 • 上一篇    下一篇

云南凤庆绿茶自溶液中对Ag+的吸附

杨中民, 杨春芬, 木冠南   

  1. 云南大学化学系 昆明 650091
  • 收稿日期:1992-11-16 修回日期:1993-07-17 出版日期:1994-02-10 发布日期:1994-02-10

The Adsorption of Ag+ in Aqueous Solution by Chinese Green Tea“Fengqin”

Yang Zhongmin, Yang Chunfen, Mu Guannan   

  1. Department of Chemistry, Yunnan University, Kunming 650091
  • Received:1992-11-16 Revised:1993-07-17 Published:1994-02-10 Online:1994-02-10

摘要: 研究了凤庆绿茶自溶液中对Ag+的吸附特性。绘制了吸附速度曲线,并求出了Langmuir和Freundlich方程中的有关参数。考察了温度、pH值对吸附的影响以及酸、碱和不同配合剂对Ag+的解吸附作用。结果表明,吸附具有以化学吸附为主的Langmuir单分子层吸附特征,0.1mol/L Na2S2O3溶液可定量地解吸Ag+

关键词: 茶叶, 银离子, 吸附

Abstract: The adsorption and desorption on“Fengqin”green tea from aqueous solution containing Ag+ were studied; The adsorption equilibrium constant(b) and maximum adsorption capacity(qm)in Langmuir equation and the experimental constants K and 1/n in Freundlich equation were determined. The effects of temperature and pH on the adsorption of Ag+ were also examined.A 0. 1mol/L Na2S2O3 solution could quantatively desorb Ag+.

Key words: chinese tea leaves, silver ion, adsorption