Synthesis of new Zn-decorated metal-organic frameworks for enhanced removal of carcinogenic textile dye: equilibrium and kinetic modeling studies.
Bibi SherinoSiti Nadiah Abdul HalimNinie Suhana Abdul MananMuhammad Afzal KambohHamid Rashidi NodehSaba AfzalNusrat BibiSharifah MohamadPublished in: Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering (2021)
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.
Keyphrases
- metal organic framework
- aqueous solution
- heavy metals
- highly efficient
- high resolution
- solid phase extraction
- quantum dots
- transcription factor
- single molecule
- reduced graphene oxide
- risk assessment
- case control
- magnetic resonance imaging
- magnetic resonance
- simultaneous determination
- contrast enhanced
- wastewater treatment
- gas chromatography mass spectrometry