A simple and low-cost route to recycle rare earth elements (La, Ce) from aqueous solution using magnetic nanoparticles of CoxMn1-xFe2O4 (x=0.2 and 0.8): synthesis, isotherms, kinetics, thermodynamics and desorption

作者：Ghobadi Misagh; Gharabaghi Mandi^*; Abdollahi Hadi; Kisomi Amir Shafiee

来源：New Journal of Chemistry, 2017, 41(20): 11906-11914.

DOI：10.1039/c7nj02125a

The use of rare earth elements has increasingly grown in recent years because of their special chemical, electrical, optical and metallurgical properties. In this work, a low-cost, highly efficient and stable magnetic nano-adsorbent is proposed to recycle rare earth cations (La and Ce) from aqueous solution. Magnetic nanoparticles of CoxMn1-xFe2O4 with x = 0.2 and 0.8 were synthesized by a simple co-precipitation method and employed in a La3+ and Ce3+ adsorption process. To characterize the adsorbent and compare the effects of different x values, XRD, FE-SEM, EDS, VSM, BET and DLS were employed. Furthermore, the adsorption kinetics, isotherms and thermodynamics were studied. To understand the nature of the reactions, the Dubinin-Radushkevich (D-R) model was applied to the experimental data. Desorption properties were also investigated to evaluate adsorbent reusability. All the results confirmed that the magnetic nanoparticles of CoxMn1-xFe2O4 (especially x = 0.2) have considerable potential as an efficient, low-cost, stable and reusable adsorbent for recycling La and Ce cations from aqueous solutions.

• 出版日期2017-10-21