KnE Materials Science

ISSN: 2519-1438

The latest conference proceedings on physical materials, energy materials, electrical materials.

Development of Technology of Arsenic Removal from Acidic Waste Solutions in the Form of Arsenic Trisulfide

Published date: Dec 31 2020

Journal Title: KnE Materials Science

Issue title: IV Congress “Fundamental Research and Applied Developing of Recycling and Utilization Processes of Technogenic Formations” Volume 2020

Pages: 209–213

DOI: 10.18502/kms.v6i1.8069

Authors:

Anna A. Grebneva - A.Grebneva@elem.ru

Irina L. Subbotina

Konstantin L. Timofeev

Gennady I. Maltsev

Abstract:

During the laboratory tests the conditions of arsenic removal from acidic waste solutions of metallurgical enterprise in the form of arsenic trisulfide were determined. The technology based on the reduction of pentavalent arsenic to trivalent state with sodium pyrosulfite solution and following arsenic trisulfide precipitation from acidic solution after treatment with sodium sulfide solution was proposed. The arsenic removal proceeds with mechanical stirring, dosing the calculated amounts of reagents and collecting emissions of hydrogen sulfide. With such treatment, about 95% of arsenic, which was in the initial solution, passes into the precipitate. An enlarged laboratory experiment was carried out and the precipitate with 42.6% of arsenic and 46.9% of sulfur was obtained. The precipitate yield was ∼25.7 kg (dry weight) out of 1 m3 of the initial arsenic containing solution.

Keywords: arsenic, arsenic trisulfide, acidic waste solutions, sodium sulfide, sodium pyrosulfite

References:

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[2] Kopylov, N. I. and Kaminsky, Y. D. (2004). Arsenic. Novosibirsk: Siberian University Publishing, p. 367.

[3] Ferron, C. J. and Piret, N. L. (2005). High Purity Arsenic Trioxide Production by Hydrothermal Treatment of Arsenic Sulphide Ores and Concentrates. Proceedings of European Metallurgical Conference EMC 2005, vol. 2, pp. 605–620.

[4] Perederiy, O. G., et al. (2007). The Method of Purification of Solutions from Arsenic. Russian Federation Patent, No. 2312820.

[5] Videla, J. M., Andina, J. B. and Cisternas, H. G. (2002). Process for Recovering Arsenic from Acidic Aqueous Solution. United States Patent, No. 7232554B2.

[6] Li, G., et. al. (2015). Efficient Removal of Arsenic from “Dirty Acid” Wastewater by using a Novel Immersed Multi-Start Distributor for Sulphide Feeding. Separation and Purification Technology, vol. 142, pp. 209– 214.

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