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11. |
UPTAKE OF METAL IONS BY A NEW CHELATING ION-EXCHANGE RESIN. PART 1: ACID DEPENDENCIES OF ACTINIDE IONS* |
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Solvent Extraction and Ion Exchange,
Volume 11,
Issue 5,
1993,
Page 943-966
E. P. Horwitz**,
R. Chiarizia,
H. Diamond,
R. C. Gatrone,
S. D. Alexandratos,
A. Q. Trochimczuk,
D. W. Crick,
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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.
ISSN:0736-6299
DOI:10.1080/07366299308918195
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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12. |
UPTAKE OF METAL IONS BY A NEW CHELATING ION-EXCHANGE RESIN. PART 2: ACID DEPENDENCIES OF TRANSITION AND POST-TRANSITION METAL IONS* |
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Solvent Extraction and Ion Exchange,
Volume 11,
Issue 5,
1993,
Page 967-985
R. Chiarizia,
E. P. Horwitz,
R. C. Gatrone,
S. D. Alexandratos,
A. Q. Trochimczuk,
D. W. Crick,
Preview
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PDF (208KB)
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摘要:
Diphonix(tm)is a new dual-mechanism polyfunctional resin containing sulfonic and gem-diphosphonic acid groups. In Part 1 of this series the effectiveness of Diphonix in removing actinide ions from very acidic solutions was demonstrated. In this paper we report on the uptake of various transition and post-transition metal ions with Diphonix and two other resins for comparison. The results show that Diphonix has a very high affinity for Fe(III) and Cr(III) in very acidic solutions. From neutral solutions Diphonix exhibits a high selectivity for lead and transition metals over calcium. Conditions for efficient stripping of the investigated ions have been found.
ISSN:0736-6299
DOI:10.1080/07366299308918196
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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