Sorption of Cs+ and Sr2+ Cations by Titanium(IV) Phosphates from Solutions Modeling the Nuclear Power Plant Bottom Residue

被引：0

作者：

Korneikov, R. I. ^{[1
]}

Tikhomirova, E. L. ^{[1
]}

Aksenova, S. V. ^{[1
]}

Petrov, A. M. ^{[1
]}

机构：

[1] Russian Acad Sci, Tananaev Inst Chem & Technol Rare Elements & Miner, Kola Sci Ctr, Fed Res Ctr, Akademgorodok, Apatity 184209, Murmansk oblast, Russia

来源：

INORGANIC MATERIALS | 2023年 / 59卷 / 01期

关键词：

liquid radioactive waste; cesium and strontium radionuclides; sorbents; titanium(IV) oxyhydroxyphosphates; bottom residue; STRONTIUM; CESIUM;

D O I：

10.1134/S0020168523010119

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a model solution, we have demonstrated the feasibility of using titanium(IV) oxyhydroxyphosphate-based ion-exchange materials for extraction of Cs+ and Sr2+ cations from multicomponent high-salt bottom residues. Conditions for the use of the ion exchangers have been optimized experimentally: liquid : solid = 50, t = 25 degrees C. It has been shown that Cs+ is effectively extracted at pH 2, whereas Sr2+, at pH 8. The zirconium-modified sorbent has been shown to have a higher affinity for metal cations. The modified sorbent is especially selective for cesium in the acid pH region owing to the higher mobility of the protons of its hydrogen phosphate groups in comparison with the unmodified sorbent composition.

引用

页码：81 / 85

页数：5

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