Synthesis of Nanoparticulate Cobalt Ferrite and Its Catalytic Properties for Fenton-Like Processes

Томина, Е. В.; Kurkin, N. A.; Дорошенко, А. В.

doi:10.1134/s0020168522070135

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…The use of various synthesis routes (hydrothermal, solvothermal, co-precipitation, sol-gel, template, and electrospinning, etc.) makes it possible to form spinel-ferrite nanoparticles with a variable size, porosity and morphology, and to successfully control their physicochemical characteristics [23][24][25][26][27]. In addition, recently it became possible to synthesize ferrites from industrial wastes [28,29], which puts them into the category of renewable resources.…”

Section: Introductionmentioning

confidence: 99%

ZnFe2O4/Zeolite Nanocomposites for Sorption Extraction of Cu2+ from Aqueous Medium

Tomina,

Novikova,

Kotova

et al. 2023

AppliedChem

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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) < Zt-2F (27.3) < Zt-8F (30.2) < Zt-16F (32.8) < ZnFe2O4 (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.

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