Received date: 2005-09-15
Revised date: 2005-09-15
Online published: 2010-10-01
Melamine, which possesses three free amino groups and three aromatic nitrogen atoms in its molecule, has great potential as an adsorbent for silver ions. The adsorptive properties of melamine for silver ions are mainly studied. The effects of adsorptive time, temperature and solution pH on the adsorptive properties of melamine are discussed. The superior adsorptive performance of melamine for silver ions is revealed. The Ag + adsorption capacity of 50 mg melamine can reach 820mg/g for 25 mL silver nitrate solution with the concentration of 0.042 mol/Lat 30 ℃. Furthermore, melamine also shows a fast adsorptive rate. The adsorptive capacity will be above 91% of the saturated adsorptive capacity after the adsorptive time of half an hour. The advantages of excellent properties for silver ion adsorption as well as its cheapness make the prospect of melamine’s application to the treatment and recovery of waste liquid containing silver ions.
Key words： melamine; silver ion; adsorption
Huang Meirong, Li Zhenyu, Xie Yun, Li Xingui . Adsorptive performance of melamine for silver ions[J]. Industrial Water Treatment, 2006 , 26(1) : 36 -39 . DOI: 10.11894/1005-829x.2006年.26（01）.36
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