article · Journal of Inorganic and Organometallic Polymers and Materials
Magnetic magnetite-graphene oxide nanocomposites prepared through in-situ precipitation can efficiently capture both cationic and anionic dyes from water. Laboratory tests using rhodamine B and methyl orange demonstrate that the material achieves peak dye removal efficiencies of 99.12 per cent within 60 minutes and 97.60 per cent within 120 minutes, respectively. The process operates optimally at pH 8 for rhodamine B and pH 4 for methyl orange, using an adsorbent dosage of 30 milligrams. Because the composite retains a saturation magnetisation of 34 electromagnetic units per gram, it can be separated from treated water rapidly using an external magnetic field. The material adheres to pseudo-second-order kinetics and Langmuir isotherm models, displaying maximum monolayer capacities of 70.64 milligrams per gram for rhodamine B and 15.94 milligrams per gram for methyl orange while maintaining stability across seven reuse cycles.
Industrial effluents frequently contain synthetic dyes that pollute water sources and resist standard filtration. Developing reusable materials that capture diverse chemical dyes and can be extracted easily using simple magnetic tools helps improve wastewater remediation. This approach demonstrates a reliable method for cleaning contaminated water while minimising secondary waste through material recycling.
This material could enable wastewater treatment facilities and textile operators to remove synthetic dyes from effluent streams without complex filtration equipment. The demonstrated magnetic recovery and stability over seven cycles suggest potential operational cost savings. Because the findings are based on laboratory-scale batch experiments using synthetic dye solutions, the technology remains early-stage research requiring validation in real industrial effluents and scaled continuous-flow systems.
AI-generated from the published abstract. Always read the original work before citing.
Abstract Magnetic magnetite-graphene oxide (Fe 3 O 4 -GO) was synthesized using an in-situ precipitation technique and applied in the adsorption of cationic rhodamine B (RhB) and anionic methyl orange (MO) dyes from aqueous solution. The nanocomposite was characterized by different techniques including FTIR, XRD, Raman, XPS, PPMS, BET, SEM and TEM techniques. Batch adsorption studies were conducted to investigate the effect of solution pH, initial metal ion concentration, adsorbent dosage and contact time. The synthesized Fe 3 O 4 -GO exhibited characteristic magnetic properties (saturation magnetization of 34 emu/g) and it separated from aqueous solution with ease through the application of an external magnetic field. The adsorption equilibrium time on the adsorption of RhB and MO onto Fe 3 O 4 -GO showed best removal of 99.12% for RhB after 60 min, while MO was removed efficiently after 120 min with a removal efficiency of 97.60%. The adsorption of the azo dyes followed the pseudo-second-order kinetics model with high correlation coefficients (0.99995) for RhB and (0.99925) for MO. Maximum removal of the dye pollutants by occurred at pH 8 for RhB and pH 4 for MO, while the optimal adsorbent dosage was 30 mg. The results showed that adsorption equilibrium data were fitted to Langmuir isotherm model and maximum monolayer adsorption capacities for RhB and MO at 70.64 and 15.94 mgg −1 , respectively. The magnetic adsorbents were reused for a maximum of 7 cycles and showed reasonable stability and reproducibility. Furthermore, the results showed that Fe 3 O 4 -GO nanocomposite can be used as an effective material in the removal of dyes from wastewater.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1007/s10904-024-03077-5
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
