Selective Capture of Ba2+, Ni2+, and Co2+ by a Robust Layered Metal Sulfide

Yu Jie Gao, Hai Yan Sun, Ji Long Li, Xing Hui Qi, Ke Zhao Du, Yi Yu Liao, Xiao Ying Huang, Mei Ling Feng, Mercouri G. Kanatzidis

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


133Ba, 63Ni, and 60Co are hazardous to the ecosystem and human health. Their nonradioactive isotopes are also worthy of concern as toxic metal ions. Barium can be studied as a simulant of hazardous 226Ra because of their comparable ionic radii and similar ion exchange behaviors. Herein, we report that the layered metal sulfide (Me2NH2)1.33(Me3NH)0.67Sn3S7·1.25H2O (FJSM-SnS) exhibits excellent capture properties for Ba2+, Ni2+, and Co2+ with high capacities (qmBa = 289.0 mg/g; qmNi = 83.27 mg/g; and qmCo = 51.98 mg/g), fast kinetics (within 5 min), wide pH durability, and outstanding Ba2+ selectivity. FJSM-SnS exhibits high removal efficiencies (>99%) for these ions in ion-exchange column experiments. The material possesses radiation resistance with good structural and crystal stability; it survives highly acidic conditions. Our results point to a promising scavenger for Ba2+, Ni2+, and Co2+ and, by extension, the even more harmful 226Ra, which suggest that metal sulfide materials should be considered as effective scavengers for these ions from complex wastewater.

Original languageEnglish
Pages (from-to)1957-1963
Number of pages7
JournalChemistry of Materials
Issue number5
Publication statusPublished - Mar 10 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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