Recovery of Rare Metals Using Nucleic Acid Bases and Extractants Immobilized by Grafted Polymer Chains

DOI Web Site Web Site
  • SAITO Kyoichi
    Department of Applied Chemistry and Biotechnology, Chiba University
  • ASAI Shiho
    Nuclear Science and Engineering Center, Japan Atomic Energy Agency

Bibliographic Information

Other Title
  • 接ぎ木高分子鎖に固定した核酸塩基及び抽出試薬によるレアメタルの回収
  • ツギキ コウブンシサ ニ コテイ シタ カクサン エンキ オヨビ チュウシュツ シヤク ニ ヨル レアメタル ノ カイシュウ

Search this article

Abstract

Polymeric adsorbents capable of capturing and purifying rare metal ions were prepared using radiation-induced graft polymerization. Polymeric chain was appended onto porous polyethylene membrane or sheet, and nylon-6 fiber, followed by the introduction of chelate-forming groups and the impregnation of extractants. First, adenine, one of four nucleic acids, was immobilized to the polymer chains grafted onto porous polyethylene hollow-fiber membrane or 6-nylon fiber to specifically bind palladium or ruthenium ionic species. The density of adenine immobilized was 0.85 mmol g−1, which was comparable to the ion-exchange group density of conventional ion-exchange beads. HDEHP, bis(2-ethylhexyl) phosphate, representative of acidic extractants was impregnated onto the polymer chains grafted onto porous polyethylene sheet or 6-nylon fiber. During the permeation of yttrium solution through the HDEHP-impregnated porous sheet with a density of HDEHP impregnated of 3.4 mmol g−1, the amount of yttrium ions adsorbed was constant irrespective of flow rate because of negligible diffusional mass-transfer resistance in the pores. Neodymium and dysprosium ions loaded onto the HDEHP-impregnated fiber-packed bed were purified by elution chromatography at a high loading and a high flow rate, compared with HDEHP-impregnated bead-packed bed. Neodymium and dysprosium ions loaded onto the HDEHP-impregnated fiber-packed bed were purified by elution chromatography at high loading and high flow rate, compared with HDEHP-impregnated bead-packed bed. Third, hybrid fibers coexisting of dodecane-thiol group with dioctyl sulfide specifically collected palladium ions in concentrated HCl medium.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 66 (11), 771-782, 2017

    The Japan Society for Analytical Chemistry

Keywords

Details 詳細情報について

Report a problem

Back to top