STUDIA UBB CHEMIA, LXV, 2, 2020 (p. 171-186) (RECOMMENDED CITATION) DOI:10.24193/subbchem.2020.2.14 CHARACTERIZATION AND APPLICATION OF NEW EFFICIENT NANOSORBENT Fe 2 O 3 PREPARED BY A MODIFIED LOW-TEMPERATURE UREA METHOD MILJANA RADOVIĆ VUČIĆ a* , JELENA MITROVIĆ a , MILOŠ KOSTIĆ a , NENA VELINOV a , SLOBODAN NAJDANOVIĆ a , DANIJELA BOJIĆ a , ALEKSANDAR BOJIĆ a ABSTRACT. In this work, low-cost non-conventional nanostructured Fe2O3 was produced by a modified low-temperature urea method (MLTUM-Fe2O3). Non-magnetic amorphous nanoparticle MLTUM-Fe2O3 with a bouquet like morphology is found to play as an effective sorbent media to remove textile dye Reactive Blue 19 from textile industries dye effluents over a wide range of pH. The nanoparticles were characterized by X-ray powder diffraction analysis (XRD), scanning electron microscopy (SEM), energy dispersive X- ray spectroscopy (EDX), FTIR and TGA. The surface area was measured by Brunauer-Emmett-Teller (BET) analysis. SEM image reveals bouquet like morphology with average particle size about 50 nm. The maximum sorption capacity of the sorbent is found to be 271.00 mg g –1 for Reactive Blue 19 and the data fitted with different isotherm models. Study on sorption kinetics shows that sorption of Reactive Blue 19 onto iron oxide follows pseudo- second-order kinetic. Keywords: Amorphous materials, Nanostructures, Iron oxide, Chemical synthesis, Thermogravimetric analysis (TGA), X-ray diffraction INTRODUCTION One of the most important industries using synthetic dyes is the textile and garment, which produces a strongly colored wastewater, typically with a concentration in the range of 10–200 mg dm –3 [1,2]. During the dyeing process, the competition between the colouring reaction and the hydrolysis of the reactive group results in a loss of unfixed dye of approximately 20‒ a The University of Niš, Faculty of Sciences and Mathematics, Department of Chemistry, Višegradska 33, 18 000 Niš, Serbia * Corresponding author: mimaradovic@gmail.com