High-performance collection of palladium ions in acidic media using nucleic-acid-base-immobilized porous hollow-fiber membranes

Takashi Yoshikawa, Daisuke Umeno, Kyoichi Saito, Takanobu Sugo

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We prepared nucleic-acid-base-immobilized porous membranes of a hollow-fiber form with pore size, porosity, and thickness of 0.2 μm, 70%, and approximately 0.7 mm, respectively. Glycidyl methacrylate was graft-polymerized onto a polyethylene-made porous hollow-fiber membrane, followed by ring-opening of the epoxy group with the amino groups of adenine, guanine, and cytosine. The collection of palladium ions was achievable during the permeation of palladium chloride solution through the adenine-immobilized porous hollow-fiber membrane. The diffusional mass-transfer resistance of palladium ion to immobilized adenine was negligible because palladium ion was transported by permeative flow through the pores. The adenine-immobilized porous membrane with an immobilization density of 0.85 mol/kg of the membrane exhibited the highest molar binding ratio of palladium ion to immobilized adenine of 0.31 in 1 M hydrochloric acid. In addition, a quantitative elution with 4 M hydrochloric acid was experimentally demonstrated.

Original languageEnglish
Pages (from-to)82-87
Number of pages6
JournalJournal of Membrane Science
Volume307
Issue number1
DOIs
Publication statusPublished - 2008 Jan 10
Externally publishedYes

Keywords

  • Adsorption
  • Graft polymerization
  • Nucleic acid base
  • Palladium
  • Porous hollow-fiber membrane

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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