Sorption of 90Sr and 90Y with stable and metastable modifications of calcium carbonate

Znamenskaya, I. V.; Berdonosova, D. G.; Berdonosov, S. S.; Sapozhnikov, Yu. A.

doi:10.1134/s1066362207010122

Cited by 2 publications

(2 citation statements)

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“…The abilities of various types of fibrous materials to adsorb 296 uranyl, americium, plutonium, technetium and caesium-137 and of clay minerals 297 to adsorb caesium, plutonium and americium, have been investigated. Other recently reported adsorption studies have included strontium-90 and yttrium-90 on calcite, 298 antimony-125 299 on alumina and titania , caesium-134 and -137 and cobalt-60 on diatomaceous earth, 300 trivalent curium on silica 301 and neptunium 302 or plutonium 303,304 on kaolinite or bentonite. 305 It has been found that a manganese/ titanium oxide composite 306 is most effective at adsorbing strontium-90 from solution.…”

Section: Rhenium ( 188 Rementioning

confidence: 99%

Radiochemistry

Urch

2008

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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This year's report on recent progress in Radiochemistry considers radiochemical methods in isotope production, advances in labelling procedures, radioactive isotopes in the environment and miscellaneous topics of radiochemical interest. Radiation chemistry, neutron activation analysis and the chemistry of elements that happen to be radioactive will be eschewed. HighlightsThe labelling of glucose 91 with oxygen-15!-from cyclotron to product in just seven minutes. A solution to part of nuclear waste problem by transmutation of technetium 381 into a stable ruthenium isotope. And the possibility of varying 46 radioactive half-lives by chemical means-to be confirmed.

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Section: Rhenium ( 188 Rementioning

confidence: 99%

Radiochemistry

Urch

2008

Annu. Rep. Prog. Chem., Sect. A: Inorg. Chem.

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“…Cu 2+ , Zn 2+ and Pb 2+ were considered as representative heavy metals ions, while an alkaline earth metal cation Sr 2+ was included in the study to explore the possibility of man‐made radioactive isotope 90 Sr removal from contaminated aqueous solutions. The sorption of Sr 2+ by natural and synthetic carbonates is well documented, but so far has not been studied using seashell waste. The experiments were conducted at different contact times, metal concentrations and initial pH, while sorbed amounts of cations, amounts of Ca 2+ released from shell structure and pH changes in various systems were monitored.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste

Egerić

Smičiklas

Mraković

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Seashell waste (SW) is rich in biogenic calcium carbonate and potentially can substitute geological sources in various applications, such as the separation of heavy metals and radionuclides from contaminated solutions. This study aims to compare SW sorption efficiency towards different chemical species (Cu2+, Zn2+, Pb2+ and Sr2+) and to evaluate the effects of various factors based on the experimental data and modeling approach. RESULTS The reaction of SW with aqueous metal solutions is a combination of several processes that result in metal retention, Ca2+ release, and changes in pH. SW demonstrates variable selectivity for investigated cations, depending on their concentrations and reaction times. Maximum sorption capacities declined in the order Zn2+ > Pb2+ ≈ Sr2+ > Cu2+. The model based on general regression neural network (GRNN) architecture was developed, which enabled prediction of removal efficiency taking into account the process specific, metal specific parameters and their non‐linear interactions. Initial concentration and covalent radius of a cation exhibit the highest, while the initial pH the lowest significance. CONCLUSION Ecological problems caused by SW accumulation in coastal areas could be mitigated by mastering technologies for their practical utilization. The results obtained facilitate the understanding of cationic pollutants removal by SW in the range of experimental conditions, while the GRNN approach demonstrates advantages in modeling complex sorption processes. © 2017 Society of Chemical Industry

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Sorption of 90Sr and 90Y with stable and metastable modifications of calcium carbonate

Cited by 2 publications

References 2 publications

Radiochemistry

Radiochemistry

Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste

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