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Synthesis of new Zn-decorated metal-organic frameworks for enhanced removal of carcinogenic textile dye: equilibrium and kinetic modeling studies.
- Source :
-
Journal of Environmental Science & Health. Part A. Toxic/Hazardous Substances & Environmental Engineering . 2021, Vol. 56 Issue 12, p1296-1305. 10p. - Publication Year :
- 2021
-
Abstract
- This paper describes the synthesis and characterization of Zn2+ decorated (adipic and terephthalic acid as linkers) piperazine-based metal-organic framework (P-MOFs) and their extraction behavior toward the Chicago sky blue (CSB) dye. The formation of Zn2+-decorated P-MOFs was confirmed by FT-IR spectroscopy, energy-dispersive spectroscopy, X-ray diffraction, BET surface area analysis and TGA. Adsorption behavior of the synthesized P-MOFs was explored through solid-phase adsorption (batch method) prior to UV-Vis spectrophotometric determination. Adsorption parameters, including adsorbent dosage, pH of solution, dye concentration, and time, were optimized. Excellent percentage removal of 94% and 95% for AP-Zn-MOF and TP-Zn-MOF, respectively, was achieved at pH 7.5. Kinetics studies indicated that the synthesized adsorbents AP-Zn-MOF and TP-Zn-MOF followed the pseudo-second-order rate model with R2 value 0.9989. The Freundlich isotherm with high R2 value as compared to Langmuir isotherm indicated that CSB adsorption for the synthesized MOFs follows multilayer adsorption. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10934529
- Volume :
- 56
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Science & Health. Part A. Toxic/Hazardous Substances & Environmental Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 154077716
- Full Text :
- https://doi.org/10.1080/10934529.2021.1987101