Polyamine-modified magnetic graphene oxide surface: Feasible adsorbent for removal of dyes

Abstract

Magnetic nanoparticles were integrated with graphene oxide sheets modified by metformin to introduce polyamine functionality in structure. Modified magnetic graphene oxide by metformin (MMGO) adsorption ability was studied for removal of methyl violet (MV) and acid red 88 (AR88) at different pH, initial concentration, and contact time. The successful preparation of magnetic nanoparticles supported with modified graphene oxide sheets is evident from FTIR spectra, TGA, zetapotential and magnetic measurements. Morphology and chemical structure of the preparedMMGO nanocompositewas studied by TEM, SEM, XPS and EDS analyses. Surface area measurement of the MMGO composite revealed high BET surface area of 226 m2 g−1. Equilibrium isotherms were employed to evaluate the experimental data and calculate the isotherms' parameters. Results showed that adsorption process is based on Langmuir isotherm (R2 N 0.99) and adsorption capacity of fabricated nano-composite was found to be 243 mg g−1 for MV and 303 mg g−1 for AR88. Kinetical results were based on pseudo-second order (R2 N 0.99) and physisorption was main process in the rate-controlling step.

Removal of Acid Red 88 from an Aqueous Solution Using Kaolinite Clay by Adsorption Process

“…At present, there are over 9000 dyes types included in the colour index for various chemical applications in the colouring industries (Q. . Acid red 88 (AR88) is a synthetic anionic red azo dye commonly employed by textile and other industries associated with colouring their products (Abdi et al, 2019). This huge consumption of these synthetic dyes and water by industries as their main raw materials results into a high pollutant load for produced effluents.…”

Photocatalytic Membranes in Degradation of Organic Molecules

“…Recently, many studies have shown that graphene-based membranes have great potential in filtration, separation and water desalination. Addition of GO (~ 1% rather than mass of polymer) can significantly improve the hydrophilicity, permeability and antifouling performance of the membranes [75][76][77].…”

Magnetic Poly(glycidyl methacrylate) Microspheres with Grafted Polypyrrole Chains for the High-Capacity Adsorption of Congo Red Dye from Aqueous Solutions

“…In recent years, magneticloaded adsorbent particles based on Fe 3 O 4 nanoparticles have obtained special attention in wastewater treatment [18][19][20][21][22][23][24][25], due to their easy recovery from the solutions by a simple, low-cost external magnetic field. Various magnetic sorbents [26,27], which are designed by making surface modifications to some special functional groups to target dyes, have dyes, have been developed to treat the corresponding dyes' wastewater. However, the majority of the magnetic adsorbents developed show relatively low adsorption capacities for objective dyes [28][29][30], and the stability of Fe3O4 nanoparticles against acidic erosion needs to be improved to increase their service time and applications in acidic conditions [31].…”