Highly Efficient and Reusable Montmorillonite/Fe3O4/Humic Acid Nanocomposites for Simultaneous Removal of Cr(VI) and Aniline

Abstract

Recyclable nanomaterials are in great need to develop clean technology for applications in the removal of water contaminants. In this work, easily separable montmorillonite/Fe3O4/humic acid (MFH) nanocomposites were fabricated through a facile hydrothermal route. It was found the adsorption ability and stability of MFH was significantly enhanced due to the synergistic effects between montmorillonite, Fe3O4 nanoparticles and humic acid. The MFH nanocomposites are highly efficient and recyclable as they can remove at least 82.3% of Cr(VI) and 95.1% of aniline in six consecutive runs. The adsorption mechanism was investigated by analyzing the kinetic parameters of pseudo first-order, pseudo second-order, and intraparticle diffusion models and describing the equilibrium isotherms of Langmuir and Freundlich models. Results indicated different adsorption mechanisms of Cr(VI) and aniline by MFH. The readily synthesized MFH nanocomposites can act as effective and practical materials for environmental applications.

In Situ Synthesis of a Stable Fe3O4@Cellulose Nanocomposite for Efficient Catalytic Degradation of Methylene Blue

“…Particularly, these groups would provide many reactive sites for the bonding between Fe 3 O 4 and cellulose, and the combination mainly through hydroxyl groups on cellulose because the characteristic peak (286.3 eV) was the strongest peaks ( Figure 4 d). Furthermore, as shown in Figure 4 f, the high resolution Fe 2p (10.6%) spectrum of Fe 3 O 4 @MAC contains two peaks at around 710.8 and 724.0 eV, corresponding to Fe 2p 3/2 and Fe 2p 1/2 belonging to Fe 3+ and Fe 2+ species [ 32 , 33 ], respectively. However, the weak peak of 716.5 eV represented the satellite peak of Fe 2+ species [ 34 ].…”

Partial Oxidation Strategy to Synthesize WS2/WO3 Heterostructure with Enhanced Adsorption Performance for Organic Dyes: Synthesis, Modelling, and Mechanism

“…Consequently, it is urgent to develop low-cost and efficient methods to remove these organic dyes from wastewater. Various technologies have been developed and employed for treating wastewater, including membrane filtration, electrochemical decolorization, photocatalytic degradation, chemical oxidation/reduction, biodegradation, and adsorption [2,[5][6][7][8][9][10][11][12][13][14][15]. Among them, adsorption is considered a promising candidate to eliminate dyes from industrial wastewater due to the low capital (0.894 g) was dissolved in NMP (70 mL), and this suspension was stirred for 10 min to obtain a dark brown solution.…”

Facile and green preparation of multifeatured montmorillonite-supported Fe3O4-Cu2+ hybrid magnetic nanomaterials for the selective adsorption of a high-abundance protein from complex biological matrices

“…By using Fe 3 O 4 nanoparticles, Peng et al 18 fabricated an efficient magnetic MMT composite that can act as both a contaminant adsorbent and as a catalyst for the activation of persulfate ions. Lu et al 19 designed easily separable MMT/Fe 3 O 4 /humic acid (MFH) nanocomposites through an easy, hydrothermal synthesis for the removal of aniline and Cr( vi ) from wastewater. They discovered that both the stability and the adsorption capacity of MFH was significantly improved from the beneficial interactions between MMT, Fe 3 O 4 nanoparticles, and humic acid.…”