Superior adsorption and removal of industrial dye from aqueous solution via magnetic silver metal-organic framework nanocomposite

ABSTRACT

The indirect emission had a negative influence on the ecosystem of enormous amounts of harmful dyes into water. Fe₃O₄@Ag-MOF was successfully fabricated to capture Gentine violet (GV)) as a model example of cationic dye from their aqueous solutions was evaluated in this search as a method to eliminate dyes from water contaminants. FTIR, XPS, BET, TGA, SEM, TEM, and XRD have all been used to study this adsorbent in order to determine its structural and chemical characteristics as well as to interpret its binding mechanisms. According to the results of the characterization, the synthesized composite had a size about 45 nm, a surface area of 856.06 m²/g, and considerable magnetic characteristics (66.2 emug⁻¹). Consequently, we created mesoporous surfaces that had a strong ability to interface and absorb GV dye. It is possible to use the pseudo-second order rate equation to characterize the kinetic profile., while the Langmuir equation fits isotherm models. At pH 9, maximum sorption capacities can reach 1.68 mmol.g⁻¹. Additionally, the investigations of temperature profiles indicated the endothermic process and Thermodynamic parameters were discovered as, ΔG°, ΔH° and ΔS° The synthesized adsorbent had an interestingly high reusability of > 92 percent up to the sixth cycle. These findings revealed that a mixture of electrostatic interactions, π-π stacking, hydrogen bonds, and pore filling were involved in the GV adsorption mechanism. Fe₃O₄@Ag-MOF was successful in demonstrating its effectiveness as a point-of-use colour collection candidate from actual dyeing effluents.

GRAPHICAL ABSTRACT

KEYWORDS:

• Fe₃O₄@Ag-MOF
• gentine violet
• removal
• waste water
• reusability

Acknowledgments

The authors would like to thank the Deanship of Scientific Research at Umm Al-Qura University for supporting this work by Grant Code: (22UQU4350527DSR10).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Novelty statement

In this search, synthesis and characterised Fe₃O₄@Ag-MOF nanocomposite with novel way that give highly surface area 856.06 m²/g and effectively removal of Gentine violet from waste water 685.44 mg/g as the nanocomposite has magnetic properties so its easily to remove GV@Fe₃O₄@Ag-MOF instead of using centrifuge. And on other hand the reusability of these nanocomposite as its used for about six times. The effectiveness on the removal of GV was compared with previous studies and the result referred that our adsorbent was the best than the other.

Additional information

Funding

This work was supported by N/a: [Grant Number N/A].