Specific Adsorption of Aspartic Acid on Iron (III) and Nickel (II) Oxides

被引:2
|
作者
Dmitrieva, I. B. [1 ]
Chukhno, A. S. [1 ]
Rodionova, E. Y. [2 ]
Novichkov, R. V. [1 ]
机构
[1] St Petersburg Univ, Chem Res Inst, 2,Univ Pr,Petrodvorets, St Petersburg 198904, Russia
[2] St Petersburg Acad Chem & Pharmacol, Phys & Colloid Chem Dept, St Petersburg 197376, Russia
关键词
D O I
10.18321/ectj126
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The dependences of zeta-potential and adsorption of aspartic acid on NiO and Fe2O3 oxides were investigated as a function of aspartic acid concentration, pH and adsorption time using microelectrophoresis and potentiometric titration methods. Shifting of pH(IEP) (the isoelectric point or IEP) towards the acid zone for Fe2O3 and towards the base zone for NiO in the solutions of aspartic acid in comparison with HCl shows the presence of specific adsorption of aspartic acid anion and cation forms on the surfaces of Fe2O3 and NiO oxides, respectively. The complexation process of Fe(III) ions with aspartic acid in the bulk solution and on the oxide surface was examined by spectrophotometer. It was determined that Fe(III) ions form complexes with aspartic acid in the bulk solution.
引用
收藏
页码:299 / 304
页数:6
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