benzimidazole;
preconcentration of heavy metals;
adsorption isotherms;
silica gel functionalized;
D O I:
10.1016/0039-9140(95)01621-X
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
The adsorption isotherms of MCl(2) (M = Mn, Ni, Cu, Zn and Cd) and FeCl3 by silica gel chemically modified with benzimidazole molecules (= SI(CH2)(3)-NC7H5N) were studied in ethanol solution at 298 K. A column made of modified silica was used to adsorb and preconcentrate the above metal ions from ethanol solution. Elution was done with 0.1 M hydrochloric acid in an ethanol/water mixture having a mole fraction of water of 0.8. The material was applied in the preconcentration of metal ions from commercial ethanol normally used as engine fuel.