Kinetic sorption study of Cerium (IV) on magnetite nanoparticles

Abstract

Magnetite nanoparticles (Fe3O4) and humic acid coated magnetite nanoparticles (Fe3O4/HA) were prepared by co-precipitation method for cerium ions removal from aqueous solution. The success of preparation in nanoscale was confirmed by XRD and TEM. The TEM image shows that the size of Fe3O4 is around 15 nm and the presence of humic acid reduces the magnetite aggregation and stabilizes the magnetite suspension. Adsorption studies with respect to various process variables Downloaded by [New York University] at 23:16 17 June 2016 2 such as contact time, pH and temperature were investigated by batch technique. The sorption kinetics and isotherms of Fe3O4 and Fe3O4/HA for Ce (IV) ions show that the sorption kinetics follow the pseudo-second-order and Langmuir isotherm model for both sorbents. The maximum capacity (Qmax) of Ce (IV) onto Fe3O4 and Fe3O4/HA were found to be 160, 280 mg/g, respectively. The thermodynamic parameters (∆G o , ∆H o and ∆S o ) were calculated, and the results revealed that the sorption process of Ce (IV) ions on both Fe3O4 and Fe3O4 /HA are spontaneous, endothermic for Fe3O4 and exothermic for Fe3O4/HA.

Magnetite and Green Rust: Synthesis, Properties, and Environmental Applications of Mixed-Valent Iron Minerals

“…420,421 Numerous studies have focused on using magnetite to target the migration and fate of persistent radionuclides in the environment, especially in the context of nuclear waste disposal. [422][423][424][425][426][427] This is of particular interest because it is thought that magnetite formation may occur during the anoxic corrosion of steel containers used to store nuclear waste. Environmental factors strongly affect the sorption of elements onto A c c e p t e d m a n u s c r i p t magnetite.…”

Sorption of Ce(III) by Silica SBA-15 and Titanosilicate ETS-10 from Aqueous Solution

“…The decline of the removal efficiency is associated with the saturation of the adsorption sites [2]. Data obtained experimentally were fitted with Langmuir, Freundlich, and Temkin isotherm models (3)(4)(5). Langmuir isotherm provides information about the monolayer formation on the homogeneous surface [34].…”

“…The wide consumption of cerium during the last decades resulted in environmental pollution (Zhao et al 2019). Taking into account the accumulation properties of cerium and its application in the nuclear industry, it is necessary to find an environmentally safe and economical method for Ce-containing solutions' treatment [1,4].…”

Probing the interaction effects of metal ions in MnxFe(3−x)O4 on arsenite oxidation and adsorption

“… 3,4 Magnetite nanoparticles are superparamagnetic and consist of both ferric and ferrous ions which allow them to possess unique properties. 5,6 They have been applied for the remediation of arsenic, 4,7,8 lead, 9,10 chromium, 9–11 cerium, 12 mercury, 13 thorium 14 and cadmium 10 contaminated water. Nanoparticles can be modified to improve their efficiency by the introduction of other ions into their structure allowing them to have a wider range of applications.…”