RECOVERY OF URANIUM FROM SEAWATER .13. LONG-TERM STABILITY-TESTS FOR HIGH-PERFORMANCE CHELATING RESINS CONTAINING AMIDOXIME GROUPS AND EVALUATION OF ELUTION PROCESS
Makaleler > Tam Makale · 1993
Yazarlar: H Egawa, Nalan KABAY, T Shuto, A Jyo
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, SCI Expanded İndekslerine Giren Dergi, Uluslararası, 1993, cilt 32, ss 540-547
DOI: 10.1021/ie00015a017
Özet
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.