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.

Department of Chemistry Faculty of Education Trnava University in Trnava Priemyselná 4 P O Box 9 SK 918 43 Trnava Slovakia

Department of Ecochemistry and Radioecology Faculty of Natural Sciences University of SS Cyril and Methodius in Trnava Nám J Herdu 2 SK 917 01 Trnava Slovakia

Department of Nanobiotechnology Biology Centre ISB CAS Na Sádkách 7 370 05 České Budějovice Czech Republic

Institute of Environmental Engineering Faculty of Civil Engineering Technical University of Košice Vysokoškolská 4 SK 042 00 Košice Slovakia

Institute of Materials Science Faculty of Materials Science and Technology in Trnava Slovak University of Technology in Bratislava J Bottu 25 SK 917 24 Trnava Slovakia

Regional Centre of Advanced Technologies and Materials Palacky University Šlechtitelů 27 783 71 Olomouc Czech Republic

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