Magnetic Nanocomposites as Efficient Sorption Materials for Removing Dyes from Aqueous Solutions

Abstract

Magnetic composite sorbents based on saponite clays with different content of magnetite (2–7 wt%.) were synthesized. The samples were analyzed by X-ray diffraction methods, and it was found that the Fe3O4 in composites is in the nanorange. It has been shown that the magnetic nanocomposites have more developed microporosity and mesoporosity compared to saponite clay. The sorption properties of magnetic nanocomposite sorbents were determined, and the results evidenced that their efficiency is significantly higher than the individual phases of the composite. It was shown that all waste composite magnetic sorbents are successfully removed from the water environment by magnetic separation.

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

“…The analysis of literature data shows that magnetic composites based on such matrices as silica gel, activated carbon, carbon nanotubes, graphene, and clay minerals, are effective sorption materials for the extraction of heavy metals [252] and organic pollutants of a different nature [253][254][255]. Thus, the modification of activated carbon with a specific surface area of 430 m 2 /g by nanosized magnetite results in a mesoporous composite with a specific surface area of 742 m 2 /g [256], while the sorption capacities of polyethyleneimine-magnetite composites [257], silica gel-magnetite composites [258], and carbon nanotube-magnetite composites [259] containing Fe 3 O 4 particles with a diameter of about 10 nm were 2-3 times higher than that of the matrix of the composites.…”

Synthesis and application of benzenesulfonic acid doped polyaniline nanorods for decolorization of simulated remazol effluent

“…Agroindustrial wastes, biological polymers, synthetic polymers, activated carbons, polymeric composites, and microorganisms have been used as adsorbents for the removal of dyes from aqueous solution and textile wastewater ; however, limited surface area of these micron‐sized adsorbents decreases the adsorption rate of the dyes. Several studies have reported the potential performance of nanosized adsorbents for the removal of dyes from simulated textile effluents .…”

Magnetic Mineral Nanocomposite Sorbents for Wastewater Treatment

“…For synthesis of MC, the magnetic modifier Fe 3 O 4 was used in the form of magnetic fluid obtained by Elmore method [12]. blay minerals have affinity to multicharged cations (particularly iron ions Fe 2+ and Fe 3+ ) that determined by morphological, crystal, and chemistry features of clays [13]. Therefore, magnetic composite sorbents based on magnetite in an amount of 7% wt.…”