2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 8: Non-ferrous, Rotary Kiln, Ferro-alloys, Rare Earth, Coal

Editors:Kongoli F, Xueyi G, Shumskiy V, Kozlov P, Capiglia C, Silva AC, Turna T
Publisher:Flogen Star OUTREACH
Publication Year:2016
Pages:350 pages
ISBN:978-1-987820-50-8
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Hydrogen Peroxide Catalytic Reduction of Selenate by Sulfur Dioxide and Formation Mechanism Research of Selenium Elementary Substance

    Runze Xu1;
    1CENTRAL SOUTH UNIVERSITY, Changsha, China;
    Type of Paper: Regular
    Id Paper: 259
    Topic: 6

    Abstract:

    Hydrogen peroxide catalyze reduce selenic acid by sulfur dioxide was discovered in this paper. The experimental conditions such as reaction temperature and acidity of solution have less influence on the catalytic reduction, and the reduction rates of selenate are all above 99.8%. This new method offered a solution of recovering selenate. Further research revealed the formation mechanism of selenium elementary substance under different reaction temperature. The analyses of solution concentration and characterizations of solid particles indicated that, under 25 oC, selenic can be directly catalytic reduced into red selenium, while reaction temperature is above 60 oC, the trigonal crystal selenium was formed by reaction between Se2- and Se4+, where the Se2- was produced by further reduction of red selenium, not a simple crystal form transformation as a result of temperature change.

    Keywords:

    Industry; Non-Ferrous; Recovery; Recycling; Reduction;

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    Cite this article as:

    Xu R. Hydrogen Peroxide Catalytic Reduction of Selenate by Sulfur Dioxide and Formation Mechanism Research of Selenium Elementary Substance. In: Kongoli F, Xueyi G, Shumskiy V, Kozlov P, Capiglia C, Silva AC, Turna T, editors. Sustainable Industrial Processing Summit SIPS 2016 Volume 8: Non-ferrous, Rotary Kiln, Ferro-alloys, Rare Earth, Coal. Volume 8. Montreal(Canada): FLOGEN Star Outreach. 2016. p. 189-190.