Development of a separation method of metals by using peroxy compounds as non-residual reagent

2015 Fiscal Year Final Research Report

• Project/Area Number: 25870473
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Analytical chemistry; Environmental conscious materials and recycle
• Research Institution: Ehime University (2014-2015); The University of Tokushima (2013)
• Principal Investigator: Yabutani Tomoki 愛媛大学, 紙産業イノベーションセンター, 教授 (80335786)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: レアメタル / ペルオキシ化合物 / 過酸化水素 / 共沈 / 金属分離 / リサイクル

Outline of Final Research Achievements

Hydrogen peroxide (H2O2) can be recognized as an environmental-friendly reagent because it is a simply structural reagent consisting of only hydrogen and oxygen atoms and easily decomposed to H2O and O2.
We investigated elution behavior of metal ions from solid states from lanthanum(La) coprecipitant by H2O2. As a result, Se(IV), Sb(III), Mo(VI), and W(VI) were eluted by H2O2 without dissolving La coprecipitant. Additionally, leaching behavior of metallic species from steel samples in peracetic acid was investigated. We compared the leaching efficiency between peracetic acid and acetic acid to estimate the role of peroxo functional group for the leaching. As a result, peracetic acid enhanced the leaching ability of metallic species from the high speed steel and the alloy steel samples. MoO3, Mo, MO2C, W, WO3, VC, MnO2 were effectively leached by peracetic acid. While, the stainless steel had a high resistance against corrosion by peracetic acid.

Free Research Field

分析化学