UPTAKE OF METAL IONS BY A NEW CHELATING ION EXCHANGE RESIN. PART 9: SILICA GRAFTED DIPHOSPHONIC ACID*
作者:
R. Chiarizia,
E.P. Horwitz,
K.A. D'Arcy,
S.D. AIexandratos,
A.W. Trochimczuk,
期刊:
Solvent Extraction and Ion Exchange
(Taylor Available online 1996)
卷期:
Volume 14,
issue 6
页码: 1077-1100
ISSN:0736-6299
年代: 1996
DOI:10.1080/07366299608918383
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A new chelating ion exchange resin, Diphonix®, containing geminally substituted diphosphonic acid ligands bonded to a styrene-based polymeric matrix, was recently developed and characterized. To overcome some of the problems associated with the stripping of actinide elements from the resin, a new version of the Diphonix resin has been prepared, where the chelating diphosphonic acid groups are grafted to a silica support. The new material is called Diphosil, for Diphonix on silica. The properties of the new material have been investigated with regard to its equilibrium and kinetic behavior in the uptake of actinide and other ions from acidic solutions. In this work data comparing the Diphonix and Diphosil resins are presented and discussed. The Diphosil resin appears particularly well suited for those cases where the recovery and further processing of the sorbed actinides is not required and the loaded resin can be considered as a solid waste. Because about 90 % of the Diphosil resin weight is silica, the problem of possible generation of gaseous compounds due to the slow radiolytical degradation of the organic components of the resin is minimized.
点击下载:
PDF (757KB)
返 回