Thiosemicarbazone Modified Zeolitic Imidazolate Framework (TSC-ZIF) for Mercury(II) Removal From Water
Use este enlace para citar
http://hdl.handle.net/2183/28417
A non ser que se indique outra cousa, a licenza do ítem descríbese como Atribución 4.0 Internacional
Coleccións
- GI-REACT! - Artigos [103]
Metadatos
Mostrar o rexistro completo do ítemTítulo
Thiosemicarbazone Modified Zeolitic Imidazolate Framework (TSC-ZIF) for Mercury(II) Removal From WaterData
2021-04-30Cita bibliográfica
A. Jaafar, C. Platas-Iglesias and R. A. Bilbeisi, RSC advances, 2021, 11, 16192-16199
Resumo
[Abstract] Zeolitic imidazolate frameworks (ZIF-8), and their derivatives, have been drawing increasing attention due to their thermal and chemical stability. The remarkable stability of ZIF-8 in aqueous and high pH environments renders it an ideal candidate for the removal of heavy metals from wastewater. In this study, we present the preparation of novel aldehyde-based zeolitic imidazolate frameworks (Ald-ZIF) through the integration of mixed-linkers: 2-methylimidazole (MIM) and imidazole-4-carbaldehyde (AldIM). The prepared Ald-ZIFs were post-synthetically modified with bisthiosemicarbazide (Bisthio) and thiosemicarbazide (Thio) groups, incorporating thiosemicarbazone (TSC) functionalities to the core of the framework. This modification results in the formation of TSC-functionalized ZIF derivatives (TSCZIFs).
Thiosemicarbazones are versatile metal chelators, hence, adsorption properties of TSC-ZIFs for the removal of mercury(II) from water were explored. Removal of mercury(II) from homoionic aqueous solutions, binary and tertiary systems in competition with lead(II) and cadmium(II) under ambient conditions and neutral pH are reported in this study. MIM3.5:Thio1:Zn improved the removal efficiency of mercury(II) from water, up to 97% in two hours, with an adsorption capacity of 1667 mg g 1. Desorption of mercury(II) from MIM3.5:Thio1:Zn was achieved under acidic conditions, regenerating MIM3.5:Thio1:Zn for five cycles of mercury(II) removal. TSC-ZIF derivatives, designed and developed here, represent a new class of dynamically functionalized adsorption material displaying the advantages of simplicity, efficiency, and reusability.
Palabras chave
Thiosemicarbazone functionalities
Zeolitic imidazolate frameworks
Wastewater mercury removal
Adsorption
Stability
Zeolitic imidazolate frameworks
Wastewater mercury removal
Adsorption
Stability
Descrición
Electronic supplementary information (ESI) available: For general methods, supplementary details on the preparation and characterization of Ald-ZIFs and TSC-ZIFs, sorption isotherms and kinetics, and regeneration of the adsorbent. See DOI: 10.1039/d1ra02025k
Versión do editor
Dereitos
Atribución 4.0 Internacional
ISSN
2046-2069