Modernization of ferrate (VI) technology from the iron hydroxides

Authors

DOI:

https://doi.org/10.15587/2312-8372.2017.92565

Keywords:

synthesis of ferrate(VI), sodium hydroxide, hypochlorite, Fe(II) and Fe(III) hydroxides

Abstract

As an alternative of the solid iron salts to improve the ferrate(VI) technology it is proposed to use Fe(II) or F(III) hydroxides that are synthesized using special technique. The patterns of Fe(VI) compounds production from iron hydroxides by hypochlorite method are studied in the article.

The effect of the main factors (OH- and Cl– ions concentration, temperature, duration of the synthesis, the molar ratio of the reactants [ClO−]/[Fe(II)] or [ClO−]/[Fe(III)]) to yield of the desired product is studied.

It is shown that conversion degree of iron hydroxides into ferrates reaches 80-86 %. It is found that using the Fe(OH)2, except ferrate anions , byproduct (Fe3O4 magnetite) is formed in an amount not exceeding about 4 % of total Fe.

It is found that ferrate(VI) yield is reduced with increasing temperature, therefore for reducing the rate of FeO42– decomposition it is recommended to carry out the synthesis at low temperatures.

It is found that conversion degree (α) of hydroxides into ferrates is also increased with increase of [ClO−]/[Fe(II)] or [ClO−]/[Fe(III)] values . Therefore, it should be maintained 2-3 fold excess oxidant to ensure the optimal values of α.

The practical guidelines of ferrate(VI) production from Fe(II) and Fe(III) hydroxides are developed on the basis of experiments.

Author Biographies

Дмитрий Аркадьевич Головко, Ukrainian State University of Chemical Technology, Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Associate Professor

Department of Inorganic Substances Technology and Ecology

Игорь Дмитриевич Головко, Ukrainian State University of Chemical Technology, Gagrina ave., 8, Dnipro, Ukraine, 49005

Assistant

Department of Analytical Chemistry and Food Additives and Cosmetics

Людмила Васильевна Шевченко, Oles Honchar Dnipropetrovsk National University, Gagarina ave., 72, Dnipro, Ukraine, 49050

PhD, Associate professor

Department of Physical and Inorganic Chemistry

Ирина Викторовна Гончарова, Kyiv National University of Trade and Economics, Kioto str., 19, Kyiv, Ukraine, 02156

PhD, Associate Professor

Department of Commodity, Safety and Quality Management

References

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Published

2017-01-31

How to Cite

Головко, Д. А., Головко, И. Д., Шевченко, Л. В., & Гончарова, И. В. (2017). Modernization of ferrate (VI) technology from the iron hydroxides. Technology Audit and Production Reserves, 1(3(33), 4–8. https://doi.org/10.15587/2312-8372.2017.92565

Issue

Vol. 1 No. 3(33) (2017): Chemical Engineering

Section

Chemical and Technological Systems: Original Research

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Copyright (c) 2017 Дмитрий Аркадьевич Головко, Игорь Дмитриевич Головко, Людмила Васильевна Шевченко, Ирина Викторовна Гончарова

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