Efficient Removal of [UO2]2+, Cs+, and Sr2+ Ions by Radiation-Resistant Gallium Thioantimonates

Mei Ling Feng, Debajit Sarma, Yu Jie Gao, Xing Hui Qi, Wei An Li, Xiao Ying Huang, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Unconventional ion exchangers can achieve efficient removal of [UO2]2+, Cs+, and Sr2+ ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [Me2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-1) and [Et2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-2), which present excellent ion exchange properties for [UO2]2+, Cs+, and Sr2+ ions. They exhibit high ion exchange capacities for [UO2]2+, Cs+, and Sr2+ ions (qm U = 196 mg/g, qm Cs = 164 mg/g, and qm Sr = 80 mg/g for FJSM-GAS-1, qm U = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO2]2+ ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively). Both compounds display active ion exchange with [UO2]2+ in the pH range of 2.9-10.5. Moreover, the sulfide compounds could maintain high distribution coefficients Kd U even in the presence of excess Na+, Ca2+, and HCO3 -. The distribution coefficient Kd U of 6.06 × 106 mL/g exhibited by FJSM-GAS-1 is the highest among the reported U adsorbents. The [UO2]2+-laden products can be recycled by conveniently eluting the uranium with a low-cost method. These advantages combined with facile synthesis, as well as β and Î radiation resistance, make FJSM-GAS-1 and FJSM-GAS-2 promising for selective separations in nuclear waste remediation.

Original languageEnglish
Pages (from-to)11133-11140
Number of pages8
JournalJournal of the American Chemical Society
Volume140
Issue number35
DOIs
Publication statusPublished - Sep 5 2018

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Gallium
Ion Exchange
Ion exchange
Ions
Radiation
Radioactive Waste
Uranium
Ion exchangers
Sulfides
Radioactive wastes
Remediation
Adsorbents
Costs and Cost Analysis
Costs

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Efficient Removal of [UO2]2+, Cs+, and Sr2+ Ions by Radiation-Resistant Gallium Thioantimonates. / Feng, Mei Ling; Sarma, Debajit; Gao, Yu Jie; Qi, Xing Hui; Li, Wei An; Huang, Xiao Ying; Kanatzidis, Mercouri G.

In: Journal of the American Chemical Society, Vol. 140, No. 35, 05.09.2018, p. 11133-11140.

Research output: Contribution to journalArticle

Feng, Mei Ling ; Sarma, Debajit ; Gao, Yu Jie ; Qi, Xing Hui ; Li, Wei An ; Huang, Xiao Ying ; Kanatzidis, Mercouri G. / Efficient Removal of [UO2]2+, Cs+, and Sr2+ Ions by Radiation-Resistant Gallium Thioantimonates. In: Journal of the American Chemical Society. 2018 ; Vol. 140, No. 35. pp. 11133-11140.
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abstract = "Unconventional ion exchangers can achieve efficient removal of [UO2]2+, Cs+, and Sr2+ ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [Me2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-1) and [Et2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-2), which present excellent ion exchange properties for [UO2]2+, Cs+, and Sr2+ ions. They exhibit high ion exchange capacities for [UO2]2+, Cs+, and Sr2+ ions (qm U = 196 mg/g, qm Cs = 164 mg/g, and qm Sr = 80 mg/g for FJSM-GAS-1, qm U = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO2]2+ ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively). Both compounds display active ion exchange with [UO2]2+ in the pH range of 2.9-10.5. Moreover, the sulfide compounds could maintain high distribution coefficients Kd U even in the presence of excess Na+, Ca2+, and HCO3 -. The distribution coefficient Kd U of 6.06 × 106 mL/g exhibited by FJSM-GAS-1 is the highest among the reported U adsorbents. The [UO2]2+-laden products can be recycled by conveniently eluting the uranium with a low-cost method. These advantages combined with facile synthesis, as well as β and {\^I} radiation resistance, make FJSM-GAS-1 and FJSM-GAS-2 promising for selective separations in nuclear waste remediation.",
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AU - Feng, Mei Ling

AU - Sarma, Debajit

AU - Gao, Yu Jie

AU - Qi, Xing Hui

AU - Li, Wei An

AU - Huang, Xiao Ying

AU - Kanatzidis, Mercouri G

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AB - Unconventional ion exchangers can achieve efficient removal of [UO2]2+, Cs+, and Sr2+ ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [Me2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-1) and [Et2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-2), which present excellent ion exchange properties for [UO2]2+, Cs+, and Sr2+ ions. They exhibit high ion exchange capacities for [UO2]2+, Cs+, and Sr2+ ions (qm U = 196 mg/g, qm Cs = 164 mg/g, and qm Sr = 80 mg/g for FJSM-GAS-1, qm U = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO2]2+ ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively). Both compounds display active ion exchange with [UO2]2+ in the pH range of 2.9-10.5. Moreover, the sulfide compounds could maintain high distribution coefficients Kd U even in the presence of excess Na+, Ca2+, and HCO3 -. The distribution coefficient Kd U of 6.06 × 106 mL/g exhibited by FJSM-GAS-1 is the highest among the reported U adsorbents. The [UO2]2+-laden products can be recycled by conveniently eluting the uranium with a low-cost method. These advantages combined with facile synthesis, as well as β and Î radiation resistance, make FJSM-GAS-1 and FJSM-GAS-2 promising for selective separations in nuclear waste remediation.

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