<i>ZnFe<sub>2</sub>O<sub>4</sub>/Zeolite</i> Nanocomposites for Sorption Extraction of Cu<sup>2+</sup> from Aqueous Medium
Elena Tomina,
Lyudmila Novikova,
Alexandra Kotova,
Anna Meshcheryakova,
Victoria Krupskaya,
Ivan Morozov,
Tatiana Koroleva,
Ekaterina Tyupina,
Nikolai Perov,
Yuliya Alekhina
Affiliations
Elena Tomina
Department of Chemistry, Voronezh State University of Forestry and Technologies Named after G.F. Morozov, 8 Timiryazeva Str., Voronezh 394087, Russia
Lyudmila Novikova
Department of Chemistry, Voronezh State University of Forestry and Technologies Named after G.F. Morozov, 8 Timiryazeva Str., Voronezh 394087, Russia
Alexandra Kotova
Department of Chemistry, Voronezh State University of Forestry and Technologies Named after G.F. Morozov, 8 Timiryazeva Str., Voronezh 394087, Russia
Anna Meshcheryakova
Department of Materials Science and Nanosystems Industry, Voronezh State University, 1 Universitetskaya pl., Voronezh 396036, Russia
Victoria Krupskaya
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Biochemistry RAS, 35, Staromonetny Per., Moscow 119017, Russia
Ivan Morozov
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Biochemistry RAS, 35, Staromonetny Per., Moscow 119017, Russia
Tatiana Koroleva
Institute of Geology of Ore Deposits, Petrography, Mineralogy and Biochemistry RAS, 35, Staromonetny Per., Moscow 119017, Russia
Ekaterina Tyupina
Department of High Energy Chemistry and Radioecology, Mendeleev University of Chemical Technology of Russia, 9, Miusskaya Square, Moscow 125047, Russia
Nikolai Perov
Faculty of Physics, Department of Magnetism, Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow119991, Russia
Yuliya Alekhina
Faculty of Physics, Department of Magnetism, Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow119991, Russia
In order to enhance the efficiency of heavy metal ion extraction from aqueous medium, new nanocomposite magnetic sorbents were synthesized on the base of natural zeolite (Zt) and nanoparticles of ZnFe2O4 (F). The composition, structure and physical–chemical properties of new composites with 2% (Zt-2F), 8% (Zt-8F) and 16% (Zt-16F) of zinc ferrite were characterized by XRD, BET adsorption–desorption of nitrogen, SEM with elemental mapping, TEM and magnetometry. The sorption capacity of materials was assessed towards Cu2+ ions in aqueous solutions, for which kinetic and equilibrium features of sorption were established. The maximal sorption capacity (amax, mg/g) of the studied materials increased in the order: Zt (19.4) 2O4 (161.3). The kinetics of the sorption process followed a pseudo-second order kinetic model. The sorption equilibrium at zinc ferrite was successfully described by the Langmuir model, while the Freundlich model better fitted the sorption equilibrium on zeolite and composites. The efficiency of Cu2+ ion extraction from 320 mg/dm3 aqueous solution was 63% for composite Zt-16F and 100% for a sample of ZnFe2O4. It was established that the proposed composite sorbents provide the operation of several cycles without regeneration, they can be easily recycled with 0.1 N HCl solution and are capable of magnetic separation. The advantages of new composites and the proposed method of synthesis allow recommending these materials as effective sorbents of heavy metals from wastewater.
