Synthesis of a new magnetic Sulfacetamide-Ethylacetoacetate hydrazone-chitosan Schiff-base for Cr(VI) removal.
Int J Biol Macromol
; 222(Pt A): 1465-1475, 2022 Dec 01.
Article
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| MEDLINE
| ID: mdl-36113599
ABSTRACT
In this study, a novel magnetic organic-inorganic composite was fabricated. Chitosan, sulfacetamide and ethylacetoacetae were used to prepare a new Sulfacetamide-Ethylacetoacetate hydrazone-chitosan Schiff-base (SEH-CSB) with a variety of active sites that capable of forming coordinate covalent bonds with Cr(VI). This was followed by modification of the formed SHE-CSB with NiFe2O4 to obtain the magnetic Chitosan-Schiff-base composite (NiFe2O4@SEH-CSB). NiFe2O4@SEH-CSB was characterized using FTIR, zeta potential, SEM, VSM and XPS. Results clarified that SHE played a crucial role in the removal of Cr(VI). The removal of Cr(VI) on NiFe2O4@SEH-CSB was found to be more fitted to pseudo-second order kinetics model and Freundlich isotherm. Besides, the maximum adsorption capacity of NiFe2O4@SEH-CSB towards Cr(VI) was found to be 373.61 mg/g. The plausible mechanism for the removal of Cr(VI) by NiFe2O4@SEH-CSB composite suggested the domination of coulombic interaction, outer-sphere complexation, ion-exchange, surface complexation and coordinate-covalent bond pathways. The magnetic property enabled easy recycling of NiFe2O4@SEH-CSB composite for seven sequential cycles.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Purificación del Agua
/
Quitosano
Idioma:
En
Revista:
Int J Biol Macromol
Año:
2022
Tipo del documento:
Article