Synthesis of novel surface-modified hematite nanoparticles for the removal of cobalt-60 radiocations from aqueous solution

摘要: In this study, novel surface-modified hematite nanoparticles (α-Fe2O3 NPs) were prepared at 250 °C using iron(III) chloride hexahydrate (FeCl3·6H2O) and oleic acid (C18H34O2) as raw materials for the removal of cobalt-60 radiocations from aqueous solutions by hydrothermal method. α-Fe2O3 NPs characterized X-ray diffraction, Fourier transform infrared (FT-IR), scanning electron microscope, transmission microscopy Brunauer–Emmett–Teller. According to results, average diameter length synthesized nanorods varied in range 30–60 400–700 nm, respectively, when specific surface area was 31.29 m2/g. batch experiments, effect some variables such pH (2–10), adsorbent weight (0.5, 1, 1.5, 2.5, 3.75 5 mg 25 mL solution), initial concentration (1, 10, 25, 50, 75 100 mg/L), temperature (25, 30, 35, 40 45 °C) contact time 2, 3, 4, 5 6 h) investigated 120 rpm. The optimized condition adsorption onto obtained 6.5, radiocation 1 mg/L, 2 h nano-α-Fe2O3 sorbent 20 mg/L. On other hand, results indicated that well fitted Ho model linear pseudo-second-order kinetics. contrast, analysis equilibrium data showed Redlich–Peterson isotherm suitable describing maximum uptake capacity about 142.86 mg/g 25 ± 1 °C according Langmuir results. Meanwhile, actual 99 mg/g. Therefore, it can be concluded is an environment-friendly a promising solutions.