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Todd, T. A.; Mann, Nick R.; Tranter, T. J.; Šebesta, F.; John, Jan; Motl, A.

doi:10.1023/a:1020881212323

Cited by 62 publications

(16 citation statements)

References 3 publications

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“…7DEOH , Distribution coefficients (K D ) for powdered ion exchangers measured using ANSTO site waste simulant (2.0 ppm Cs + and 0.6 ppm Sr 2+ in 1M HNO 3 These data reveal that, while the sitinakite-based silicotitanates and the PYRO are quite selective for Cs + under such acidic conditions, they have little, if any, selectivity for Sr 2+ . Interestingly, the HTB sample displays comparable Cs + selectivity to that of the optimised Nbdoped silicotitanate (R = 0.1) but in addition displays some selectivity for Sr 2+ .…”

Section: Andv Dqg 6u Rq ([Fkdqjhmentioning

confidence: 90%

“…)LJXUH $ -The effect of varying [Na + ] upon the uptake of Cs + and Sr + by Mo-HTB (--and -• -, respectively) from simulants consisting of 160 ppm Cs + and 96 ppm Sr + in 1M HNO 3 . Combined uptake of Cs + and Sr + by Mo-HTB is represented by --; % -The effect of varying [K + ] upon the uptake of Cs + and Sr + by Mo-HTB (--and -• -, respectively) from simulants consisting of 160 ppm Cs + and 96 ppm Sr + in 1M HNO 3 .…”

Section: Andv Dqg 6u Rq ([Fkdqjhmentioning

confidence: 99%

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Cs⁺ and Sr²⁺ Ion-Exchange Properties of Microporous Tungstates

Luca¹,

Griffith²,

Chronis³

et al. 2003

MRS Proc.

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The hydrothermally prepared hexagonal tungsten bronze (HTB) phase displays promising distribution coefficients (. ' ) for both Cs + (2 -100 ppm) and Sr 2+ (0.5 -60 ppm) in acidic (1M HNO 3 ) radioactive waste simulants. The development of an inorganic ion-exchanger that displays such selectivity has previously eluded researchers in this field. The selectivity for Cs + and Sr 2+ can be modulated by isomorphous substitution of molybdenum into the tungstate framework, and is optimum for material of nominal composition, Na 0.2 Mo 0.03 W 0.97 O 3 ·]H 2 O (Mo-HTB). Both the parent HTB and Mo-HTB phases display fast ion-exchange kinetics for Cs + and Sr 2+ and cation exchange capacities ca. 50% that of the theoretical capacities of 0.9 and 0.45 mmol.g -1 , respectively. The Mo-HTB adsorbent has a modest tolerance to alkali metal ions such as Na + and K + in acidic solutions with total Cs + and Sr 2+ uptake dropping by 66% as the concentration of Na + increases from 9 mmol.L -1 to 1200 mmol L -1 .,1752'8&7,21 )LJXUH Hexagonal Tungsten Bronze (+7%) (left) and pyrochlore (3<52) structures (right) viewed down the Fcrystallographic axis.

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Section: Andv Dqg 6u Rq ([Fkdqjhmentioning

confidence: 90%

Section: Andv Dqg 6u Rq ([Fkdqjhmentioning

confidence: 99%

Cs⁺ and Sr²⁺ Ion-Exchange Properties of Microporous Tungstates

Luca¹,

Griffith²,

Chronis³

et al. 2003

MRS Proc.

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“…Among these techniques, ion exchange is one of the most promising process and many types of inorganic ion exchange materials and adsorbents have been applied including magnetite, natural zeolite, silicotitanate, hexacyanoferrate complexes, AMP-calcium alginate composite, and PAN-based adsorbers [5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous solid phase extraction of cobalt, strontium and cesium from liquid radioactive waste using microcrystalline naphthalene

Hamed¹,

Attallah²,

Metwally³

2014

Radiochimica Acta

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Most of the procedures developed for the extraction of cobalt, strontium and cesium by solid phase extraction do not employ simultaneous extraction of them. In this study, rapid simultaneous removal of Co 2+ , Sr 2+ and Cs + on microcrystalline naphthalene as solid-phase extractant was investigated. These ions were allowed to form chelates with oxine and then adsorbed on freshly microcrystalline naphthalene from aqueous solutions. The solid phase extraction procedure (SPE) was optimized by using model solution containing Co 2+ , Sr 2+ and Cs + in batch system. The effects of different parameters such as variation in pH, reagent concentration, standing time, naphthalene solution concentration and contact time on the simultaneous removal of these ions was studied. The obtained results indicated that, sorption was found to be rapid, and the percentage removal of Co 2+ , Sr 2+ and Cs + was found to be 98, 79 and 68% within 10 min, respectively. The kinetics of the sorption process was investigated to understand the kinetic characteristics of sorption of metal chelates onto microcrystalline naphthalene. The developed procedure has been successfully applied to the removal and recovery of 60 Co and 134 Cs from liquid radioactive waste.The parameters can be used for designing a plant for treatment of wastewater economically.

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“…This can result in significant cost savings by permitting the disposal of the treated bulk liquid as low level waste grout [6,7]. Such volume and/or heat load reduction strategies have been the subject of a significant research effort resulting in the introduction of several new separations materials and methods [8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%