Abstract
Microwave synthesized iron oxide nanoparticles and microparticles were used to prepare a magnetically responsive biosorbent from Rhytidiadelphus squarrosus moss for the rapid and efficient removal of Co2+ ions and thioflavin T (TT). The biocomposite was extensively characterized using Fourier transformed infrared (FTIR), XRD, SEM, and EDX techniques. The magnetic biocomposite showed very good adsorption properties toward Co2+ ions and TT e.g., rapid kinetics, high adsorption capacity (218 μmol g−1 for Co and 483 μmol g−1 for TT), fast magnetic separation, and good reusability in four successive adsorption–desorption cycles. Besides the electrostatic attraction between the oxygen functional moieties of the biomass surface and both Co2+ and TT ions, synergistic interaction with the –FeOH groups of iron oxides also participates in adsorption. The obtained results indicate that the magnetically responsive biocomposite can be a suitable, easily separable, and recyclable biosorbent for water purification.
Highlights
Considerable efforts are currently being made to eliminate contaminants that have caused growing concern from the large volume of industrial effluents and wastewaters [1]
Prepared magnetic biosorbent was characterized (Fourier transformed infrared (FTIR), X-ray diffraction (XRD), SEM, and EDX elemental mapping) and utilized for the adsorption of both metal ions and synthetic organic dye from aqueous solutions, and the effects of various environmental parameters on the adsorption performance were systematically investigated by batch adsorption experiments
Cobalt ions are present in the wastewaters of many industries; unlike other heavy metals such as Cd, Pb, Hg, Cu, and Zn, less attention is paid to Co removal processes from contaminated effluents
Summary
Considerable efforts are currently being made to eliminate contaminants that have caused growing concern from the large volume of industrial effluents and wastewaters [1]. The decrease of metals ions’ biosorption efficiency after magnetic modification is probably due to the blocking of binding sites on a biomass surface with deposited iron oxides [10]. Further research on the magnetically responsive biomass adsorption performance of both organic and inorganic pollutants is of great importance to provide an insight into the biosorption mechanism and to ensure the applicability of biosorption technology for industrial effluents. Prepared magnetic biosorbent was characterized (Fourier transformed infrared (FTIR), XRD, SEM, and EDX elemental mapping) and utilized for the adsorption of both metal ions and synthetic organic dye from aqueous solutions, and the effects of various environmental parameters on the adsorption performance were systematically investigated by batch adsorption experiments. Magnetically responsive biosorbent can be useful as an inexpensive material for the efficient separation of both organic dyes and metal ions from industrial effluents. Cobalt ions are present in the wastewaters of many industries; unlike other heavy metals such as Cd, Pb, Hg, Cu, and Zn, less attention is paid to Co removal processes from contaminated effluents
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