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

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2024-12-21 DOI:10.1134/S2070205124701880

O. D. Linnikov, I. V. Rodina, G. S. Zakharova, I. V. Baklanova, Yu. V. Kuznetsova, A. P. Tyutyunnik, Z. A. Fattahova, L. Yu. Buldakova

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Abstract

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⋅2H₂O and contain small amounts of goethite (α-FeOOH) and lepidocrocite (γ-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 ζ 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.

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.