UPTAKE OF METAL IONS BY A NEW CHELATING ION-EXCHANGE RESIN. PART 1: ACID DEPENDENCIES OF ACTINIDE IONS*
作者:
E. P. Horwitz**,
R. Chiarizia,
H. Diamond,
R. C. Gatrone,
S. D. Alexandratos,
A. Q. Trochimczuk,
D. W. Crick,
期刊:
Solvent Extraction and Ion Exchange
(Taylor Available online 1993)
卷期:
Volume 11,
issue 5
页码: 943-966
ISSN:0736-6299
年代: 1993
DOI:10.1080/07366299308918195
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The uptake of several actinide ions [U(VI), Pu(IV), Np(IV), Th(IV] and Am(DI)) from nitric and hydrochloric acid solutions, and of U(VI) from near-neutral solutions by the new chelating ion-exchange resin, DiphonixTM, has been investigated. Diphonix is a polyfunctional resin containing sulfonic and gem-diphosphonic acid groups chemically bonded in a styrene-divinylbenzene polymeric network. Comparison of the acid dependencies of the actinide ions uptake measured with Diphonix with those obtained using a commercial sulfonic -type resin and a resin containing both sulfonic and monophosphonic aCid groups, hat Shown that Diphonix binds the actinides via a different kind of chemical interaction, involving the.formation of chelate complexes through the phosphoryl groups of the gem-diphosphonic acids. As a consequence, Diphonix is superior to other resins in extracting actinide ions from very acidic solutions. A better performance of Diphonix is also observed with the uptake of uranium from neutral solutions. Conditions for efficient stripping of actinide species from the resin have been found.
点击下载:
PDF (301KB)
返 回