Appraisal of Mixed Amorphous Manganese Oxide/Titanium Oxide Sorbents for the Removal of Strontium-90 from Solutions, with Special Reference to Savannah River Site and Chernobyl Radioactive Waste Simulants:
TLDR
In this paper, the applicability of manganese oxide/titanium oxide composites for remediation technologies has been tested, specifically for 90Sr removal from Savannah River Site high-level waste supernatants and Chernobyl 4th Block Shelter water (CSW) simulants.Abstract:
Hydrous, amorphous manganese oxide/titanium oxide composites (AMTO) obtained via template synthesis using alkali metal ions as templates have been characterized. Their applicability in remediation technologies has been tested, specifically for 90Sr removal from Savannah River Site high-level waste supernatants (SHLW) and Chernobyl 4th Block Shelter water (CSW) simulants. Sorption isotherms were used to establish the efficiency of the templating process, while the proton-exchange capacity of AMTO was determined to show that the solids were really protonated. Use of the 90Sr isotope showed that there was little dependence of the distribution coefficients for AMTO on pH, and at pH < 7, i.e., in neutral and acidic media, AMTO had a much greater affinity for strontium than commercial sorbents. Tests with SHLW and CSW simulants revealed that AMTO is capable of removing more than 99% of 90Sr from such wastes. Hence, it could be useful for solving decontamination problems.read more
Citations
More filters
Journal ArticleDOI
The sorption behaviour of synthetic sodium nonatitanate and zeolite A for removing radioactive strontium from aqueous wastes
TL;DR: In this paper, the authors compared the performance of two inorganic materials, namely, sodium nonatitanate and zeolite A, in real and simulated liquid waste from the Fukushima site.
Journal ArticleDOI
Strontium selectivity in sodium nonatitanate Na4Ti9O20·xH2O
Arnaud Villard,Bertrand Siboulet,Guillaume Toquer,Aurélie Merceille,Agnès Grandjean,Jean-François Dufrêche +5 more
TL;DR: It is found that the free energy of the solid phase is controlled by short-range interactions rather than long-ranged Coulombic forces.
Journal ArticleDOI
Manganese dioxide-loaded mesoporous SBA-15 silica composites for effective removal of strontium from aqueous solution.
Hui Dan,Yi Ding,Enchao Wang,Wenping Yang,Xinmiao He,Li Chen,Qiang Xian,Facheng Yi,Wenkun Zhu +8 more
TL;DR: The results suggested that the Adsorption process was spontaneous and endothermic, and the overall mechanism of Sr2+ adsorption was a combination of physical and chemical processes.
Journal ArticleDOI
Effect of the synthesis temperature of sodium nonatitanate on batch kinetics of strontium-ion adsorption from aqueous solution
TL;DR: In this article, the results of batch kinetics experiments for the removal of strontium from aqueous solutions were performed, and the data were fitted by a pseudo-second-order reaction model and a diffusive model.
Journal ArticleDOI
Investigation of Sr uptake by birnessite-type sorbents from seawater
Andrei Egorin,T. A. Sokol’nitskaya,Yuliya Azarova,Arseniy Portnyagin,M. I. Balanov,Darya Misko,Evgeny Shelestyuk,Anastasia Kalashnikova,Eduard Tokar,Ivan G. Tananaev,Valentin Avramenko +10 more
TL;DR: In this article, the authors used granulated Na-birnessite for the removal of radionuclide from liquid radioactive wastes containing seawater, and showed that over 150 bed volumes of seawater can be purified till 5% breakthrough occurs at feed rate 10 BV−h−1.
References
More filters
Journal ArticleDOI
Synthesis, Crystal Structures, and Ion-Exchange Properties of a Novel Porous Titanosilicate
TL;DR: In this article, a tetragonal sodium titanosilicate of ideal composition was synthesized by ab initio methods from X-ray powder data by solving the Rietveld problem.
Journal ArticleDOI
Alkali Metal Ions Insertion/Extraction Reactions with Hollandite-Type Manganese Oxide in the Aqueous Phase
Journal ArticleDOI
Assessment of a Sodium Nonatitanate and Pharmacosiderite-Type Ion Exchangers for Strontium and Cesium Removal from DOE Waste Simulants
TL;DR: Several inorganic ion exchangers were tested for 89Sr and 137Cs removal from simulated DOE aqueous defense wastes (NCAW and 101SY-Cs5) and a Hanford groundwater solution (N-springs) as discussed by the authors.
Journal ArticleDOI
Hydrothermal Synthesis of Lithium and Sodium Manganese Oxides and Their Metal Ion Extraction/Insertion Reactions
Journal ArticleDOI
Phase transitions and ion exchange behavior of electrolytically prepared manganese dioxide
Xiang-Mu Shen,Abraham Clearfield +1 more
TL;DR: In this article, the same authors showed that the oxides prepared at 25°C or lower exhibited a high ion exchange capacity equivalent to one proton per two Mn atoms and those prepared at higher temperatures exhibited correspondingly lower capacities and the 95°C preparation showed surface exchange.
Related Papers (5)
Studies of sorbent/ion-exchange materials for the removal of radioactive strontium from liquid radioactive waste and high hardness groundwaters
Dmitry Marinin,Garrett N. Brown +1 more