Adsorption behavior of trivalent americium and rare earth ions onto a macroporous silica-based isobutyl-BTP/SiO2-P adsorbent in nitric acid solution

Yuanlai Xu, Seong Yun Kim, Tatsuya Ito, Keitaro Hitomi, Etsushu Kuraoka, Shigekazu Usuda, Keizo Ishii

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

To separate minor actinides from high level liquid waste (HLLW) of PUREX reprocessing, a silica-based macroporous isobutyl-BTP/SiO2-P adsorbent was synthesized by impregnating isobutyl-BTP (2,6-di(5,6-diisobutyl-1, 2,4-triazin-3-yl)pyridine) extractant into the macroporous SiO2-P support with a mean diameter of 60 μm. A partitioning process using extraction chromatography for the treatment of HLLW was designed consisting five separation columns. As a partly work focused on isobutyl-BTP/SiO2-P separation column, adsorption behavior of 241Am and trivalent rare earth (RE) from simulated HLLW onto silica-based isobutyl-BTP/SiO2-P adsorbent was investigated by batch method. Meanwhile, the chemical and radiolytic stabilities of isobutyl-BTP/SiO2-P adsorbent against 0.01 M HNO3 solution and γ-ray irradiation were studied. It was found that isobutyl-BTP/SiO2-P adsorbent exhibited good adsorption selectivity for 241Am over RE(III) in 0.01 M HNO3 solution and showed weak or no adsorption affinity to light and middle RE(III) groups. In addition, in stability experiments, isobutyl-BTP adsorbent showed excellent stability against 0.01 M HNO3 solution and γ-ray irradiation over 4 months contact time.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume299
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • Adsorption behavior
  • Americium
  • Rare earth
  • isoButyl-BTP/SiO-P adsorbent

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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