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Refining and Mutual Separation of Rare Earths Using Biomass Wastes

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Abstract

Two different types of adsorption gels were prepared from biomass wastes. The first gel was produced from astringent persimmon peel rich in persimmon tannin, a polyphenol compound, which was prepared by means of simple dehydration condensation reaction using concentrated sulfuric acid for crosslinking. This adsorption gel was intended to be employed for the removal of radioactive elements, uranium (U(VI)) and thorium (Th(IV)), from rare earths. The second gel was prepared from chitosan, a basic polysaccharide, produced from shells of crustaceans such as crabs, shrimps, prawns, and other biomass wastes generated in marine product industry, by immobilizing functional groups of complexanes such as ethylendiaminetetraacetic acid and diethylentriaminepentaacetic acid (DTPA). This gel was developed for the mutual separation of rare earths. Of the two adsorption gels evaluated, the DTPA immobilized chitosan exhibited the most effective mutual separation among light rare earths.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Science and Engineering, Saga University, Saga, 840-8502, Japan

    Katsutoshi Inoue

  2. Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, NL, A1B 3X5, Canada

    Shafiq Alam

Authors
  1. Katsutoshi Inoue
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  2. Shafiq Alam
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Correspondence to Shafiq Alam.

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Inoue, K., Alam, S. Refining and Mutual Separation of Rare Earths Using Biomass Wastes. JOM 65, 1341–1347 (2013). https://doi.org/10.1007/s11837-013-0716-y

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  • DOI: https://doi.org/10.1007/s11837-013-0716-y

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