Sorption of Nickel Ions on Iron(III) Hydroxide Freshly Precipitated from a Solution of Iron(II) Sulfate. Part 2. Structure and Composition of Iron(III) Hydroxide Precipitates

被引：0

作者：

Linnikov, O. D. ^{[1
]}

Rodina, I. V. ^{[1
]}

Zakharova, G. S. ^{[1
]}

Baklanova, I. V. ^{[1
]}

Kuznetsova, Yu. V. ^{[1
]}

Tyutyunnik, A. P. ^{[1
]}

Fattahova, Z. A. ^{[1
]}

Buldakova, L. Yu. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Solid State Chem, Ural Branch, Ekaterinburg 620990, Russia

来源：

PROTECTION OF METALS AND PHYSICAL CHEMISTRY OF SURFACES | 2024年 / 60卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

iron(III) hydroxide; iron(II) sulfate; nickel; IR; Raman spectroscopy; X-ray phase and thermogravimetric methods of analysis; zeta potential; ALPHA-FEOOH; GOETHITE; FERRIHYDRITE; MECHANISM; HEMATITE; OXIDES;

D O I：

10.1134/S2070205124701880

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A comparative analysis of the composition and structure of freshly precipitated iron(III) hydroxide precipitates obtained from a solution of iron(II) sulfate in the presence of sodium sulfate (400 mg/L) at pH 7 and 8 before and after sorption of nickel ions on them was carried out. Using IR and Raman spectroscopy and X-ray phase and thermogravimetric analysis, it was shown that the precipitates have the gross formula Fe2O3 & sdot;2H2O and contain small amounts of goethite (alpha-FeOOH) and lepidocrocite (gamma-FeOOH). It has been established that the sorption of nickel ions on these precipitates is not accompanied by chemisorption, i.e., the formation of mixed compounds between iron and nickel. The zeta potential of precipitate particles at pH < 6 has a positive value, and at pH > 6 it becomes negative. The point of zero charge of precipitate particles corresponds to pH 6.

引用

页码：373 / 380

页数：8