Inorganic Ion Exchangers for Cesium Removal from Radioactive Wastewater
authors Figueiredo, BR; Cardoso, SP; Portugal, I; Rocha, J; Silva, CM
nationality International
journal SEPARATION AND PURIFICATION REVIEWS
author keywords Ammonium phosphomolybdates; batch removal; bentonite; cesium; fixed-bed removal; hexacyanoferrates; ion exchange; metal oxides and hydrous oxides; titanosilicates; zeolites
keywords MICROPOROUS TITANOSILICATE ETS-10; LANTHANIDE SILICATE EU-AV-20; POLYACRYLONITRILE AMP-PAN; CS ADSORPTION CAPABILITY; NUCLEAR-POWER-PLANT; FIXED-BED COLUMN; AMMONIUM MOLYBDOPHOSPHATE; AQUEOUS-SOLUTIONS; SELECTIVE REMOVAL; SODIUM TITANATE
abstract Ion exchange is a proven process for radioactive wastewater decontamination, where inorganic sorbents are ideal due to their thermal, chemical and radiation stability. This review focuses on the removal of Cs+ by inorganic exchangers, viz. zeolites, titanosilicates, hexacyanoferrates metal oxides and hydrous metal oxides, bentonite/clays and the key family of ammonium phosphomolybdates (AMPs). The design of new selective composites is also addressed focusing on those based on AMPs, hexacyanoferrates and titanosilicates/zeolites. Future inorganic Cs+ exchangers will encompass promising solids, like lanthanide silicates, sodium titanates and metal sulfides. The sensing ability derived from the photoluminescence properties of lanthanide silicates and the efficiency of layered gallium-antimony-sulfide materials in acidic and basic solutions disclose considerable potential for real applications. The ion exchange systems are discussed in terms of sorbent capacity and selectivity (with competitors), pH, temperature and solution salinity. The microscopic features of the exchangers and the associated mechanisms (e.g., pore size, counterions radii, dehydration energy of the ions, coordination environments in the solid exchanger, and site accessibility) are always used for interpreting the ion exchange behavior. On the whole, more than 250 publications were reviewed and a large compilation of data is provided in Supplemental Material.
publisher TAYLOR & FRANCIS INC
issn 1542-2119
year published 2018
volume 47
issue 4
beginning page 306
ending page 336
digital object identifier (doi) 10.1080/15422119.2017.1392974
web of science category Chemistry, Applied; Chemistry, Analytical; Engineering, Chemical
subject category Chemistry; Engineering
unique article identifier WOS:000440609900003
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journal analysis (jcr 2017):
journal impact factor 4.212
5 year journal impact factor 4.983
category normalized journal impact factor percentile 88.169
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