Neodymium(III) removal by functionalized magnetic nanoparticles

Abstract

In this paper, neodymium removed by liquidsolid extraction is made by magnetic nanoparticles functionalized by the poly(aminoethylene N-methyl 1-formic acid, 1-phosphonic acid) (PAEMFP), with two different sizes. For a quantity of 0.01 g of magnetic particles some parameters were studied. Optimal extraction yield was achieved in a initial pH equal at 7.0 for fine particles and pH 6.0 for the large particles. The experimental capacity obtained was 25 mg g -1 for larges particles and 23 mg g -1 for fines particles. The quantitative elution study of neodymium(III) can be realized with acetic acid 0.5 mol L -1 after 120 min of shaking for two sizes.

Neodymium recovery from NdFeB magnets: a sustainable, instantaneous, and cost-effective method

“…The pH above 7 was not investigated in our experiment owing to the precipitation of neodymium hydroxide in an alkaline medium. 52…”

“…The pH above 7 was not investigated in our experiment owing to the precipitation of neodymium hydroxide in an alkaline medium. 52 Effect of temperature. We study the adsorption of Nd 3+ on CFNC at different temperatures (10 to 80 °C).…”

Synthesis of Quinoline/Phenanthroline Impregnated Sugarcane Bagasse for Recovering Uranium(VI) and Thorium(IV) from their Solutions

“…Firas stated that this might be back to the limited number of active sites present on the adsorbent surface which become saturated at a certain uranium concentration. On increasing uranium concentration, uranium molecules compete for the available remaining active sites on the adsorbent surface, leading to the decrease in adsorption percent …”

Adsorption-based Separation and Recovery of Rare Earth Elements

“…Magnetic Fe 2 O 3 coated with silica and functionalized with APTMS, (γ-Fe 2 O 3 -NH 4 OH@SiO 2 (APTMS)) achieved maximum Dy(III) adsorption of 23.3 mg at pH 7 (Kegl et al, 2019). Magnetic nanoparticle functionalized with poly(aminoethylene N-methyl 1-formic acid, 1-phosphonic acid) (PAEMFP) reached 25 mg/g Nd(III) adsorption capacity at PH 6 (Miraoui et al, 2016). Other research involving coated magnetic nanoadsorbents for REEs adsorption include silica-coated magnetic particle grafted with 2-ethylhexyl phosphonic acid mono-2-ethylhexyl (P507) using 3-chloropropyltryethosysilane as silane-coupling agent (Wu et al, 2013) and magnetic Fe 3 O 4 coated with SiO 2 and TiO 2 and modified with N-[(3-trimethoxysilyl) propyl] EDTA (TMS-EDTA) (Dupont et al, 2014).…”