RECOVERY OF URANIUM FROM SEAWATER .13. LONG-TERM STABILITY-TESTS FOR HIGH-PERFORMANCE CHELATING RESINS CONTAINING AMIDOXIME GROUPS AND EVALUATION OF ELUTION PROCESS


Egawa H., KABAY N. , Shuto T., Jyo A.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol.32, no.3, pp.540-547, 1993 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 3
  • Publication Date: 1993
  • Doi Number: 10.1021/ie00015a017
  • Title of Journal : INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
  • Page Numbers: pp.540-547

Abstract

Large-scale adsorption/elution cycles were performed to investigate the long-term stability of the chelating resins employed. The adsorbed metal ions were rapidly and quantitatively eluted from the resins with acid eluants. The shrinkage of the resins with successive adsorption/elution cycles influenced the adsorption capacity. The uranium recovery was maintained at a nearly constant value by the employment of bicarbonate eluants. In particular, 2 mol dm-3 NH4HCO3 yielded an efficient stripping for uranium. However, it was clarified that the elution with 0.25 mol dm-3 H2SO4, which gave a high efficiency, was better than the bicarbonate eluants.