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[期刊论文]

Highly selective capture of Ni2+ from complex environments by a sandwich-like layered metal sulfide ion exchanger

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author:

Zhang, Mingdong (Zhang, Mingdong.) [1] | Hong, Qisheng (Hong, Qisheng.) [2] | Yuan, Aocheng (Yuan, Aocheng.) [3] | Unfold

Indexed by:

EI Scopus SCIE

Abstract:

Radionickel ion (Ni-63(2+)) remediation is critical for public health and the environment, but selectively capturing of Ni2+ from complex environments like seawater presents a challenge. Metal sulfide ion exchangers (MSIEs) are emerging as efficient adsorbents for radionuclides; however, the study of MSIEs for selectively removing Ni2+ is still in its infancy. Herein, the layered metal sulfide K2Cu2Sn2S6 (CTS-1) with a unique sandwich-like anionic framework was synthesized by the hydrothermal method for the first time, representing a novel approach in the selective capture of Ni2+ from complex environments. Single-crystal structural analysis confirmed the sandwich-like framework, in which a [Cu-S] sublayer is sandwiched by two [Sn-S] sublayers with parallel grooves. The charge-balancing K+ ions are located within these grooves. Due to its special structure, CTS-1 exhibits remarkable adsorption capacities for Ni2+ with rapid kinetics (a high rate constant k(2) of 7.26 x10(-2) g/(mgmin)), broad pH durability (removal rates >97 % at pH 3-12), and high selectivity (separation factors for Ni2+ >700 against various cations). Impressively, it can efficiently remove Ni2+ from multiple complex environments, achieving a 90.28 % removal rate even in seawater (C-0(Ni) similar to 5 mg/L). CTS-1 is environmentally friendly and suitable for use in fixed-bed columns for the practical application. Moreover, Ni2+ ions are captured through ion exchange with K+, and the high selectivity stems from the strong affinity of S2- for Ni2+ and the trapping effect of the grooves within the structure. In summary, this pioneering study demonstrates the highly selective capture of Ni2+ by a sandwich-like layered MSIE, potentially inspiring the development of efficient scavengers for radionuclides.

Keyword:

Adsorption Crystal structure Hydrothermal synthesis Radioactive wastewater Seawater matrix

Community:

  • [ 1 ] [Zhang, Mingdong]Minjiang Univ, Fuzhou Inst Oceanog, Coll Geog & Oceanog, Fujian Key Lab Conservat & Sustainable Utilizat Ma, Fuzhou 350108, Peoples R China
  • [ 2 ] [Hong, Qisheng]Minjiang Univ, Fuzhou Inst Oceanog, Coll Geog & Oceanog, Fujian Key Lab Conservat & Sustainable Utilizat Ma, Fuzhou 350108, Peoples R China
  • [ 3 ] [Yuan, Aocheng]Minjiang Univ, Fuzhou Inst Oceanog, Coll Geog & Oceanog, Fujian Key Lab Conservat & Sustainable Utilizat Ma, Fuzhou 350108, Peoples R China
  • [ 4 ] [Zhang, Yan]Minjiang Univ, Fuzhou Inst Oceanog, Coll Geog & Oceanog, Fujian Key Lab Conservat & Sustainable Utilizat Ma, Fuzhou 350108, Peoples R China
  • [ 5 ] [Mu, Jingli]Minjiang Univ, Fuzhou Inst Oceanog, Coll Geog & Oceanog, Fujian Key Lab Conservat & Sustainable Utilizat Ma, Fuzhou 350108, Peoples R China
  • [ 6 ] [Zhang, Mingdong]Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
  • [ 7 ] [Huang, Xiaoying]Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
  • [ 8 ] [Feng, Meiling]Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China
  • [ 9 ] [Hong, Qisheng]Fuzhou Univ, Coll Environm & Safety Engn, Fuzhou 350028, Peoples R China
  • [ 10 ] [Zhang, Yan]Fuzhou Univ, Coll Environm & Safety Engn, Fuzhou 350028, Peoples R China
  • [ 11 ] [Yuan, Aocheng]Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin 300401, Peoples R China

Reprint 's Address:

  • [Mu, Jingli]Minjiang Univ, Fuzhou Inst Oceanog, Coll Geog & Oceanog, Fujian Key Lab Conservat & Sustainable Utilizat Ma, Fuzhou 350108, Peoples R China;;[Feng, Meiling]Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Fujian, Peoples R China;;

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Source :

JOURNAL OF HAZARDOUS MATERIALS

ISSN: 0304-3894

Year: 2025

Volume: 482

1 2 . 2 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

30 Days PV: 2

Online/Total:14/10042793
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