Adsorption of lanthanum (III) from aqueous solution using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester-grafted magnetic silica nanocomposites

Preparation and characterization of magnetic iron oxide nanoparticles functionalized by l-cysteine: Adsorption and desorption behavior for rare earth metal ions

“…Due to the clear advantages of SPE technology, considerable efforts have been made to find new materials that can be used as a selective sorbents [5,[14][15][16][17][18][19][20][21]. Several types of nanomaterials, including magnetic iron oxide nanoparticles (Fe3O4 NPs) have unique advantages SPE adsorbents such as favorable chemical stability, low cost, easily retrieved from solution with a magnet.…”

On the Extraction of Rare Earth Elements from Geothermal Brines

“…A variety of sorbents show high affinities towards a variety of REEs with good capacities, rapid kinetics, and economics. Although many REE adsorbents have been studied [49][50][51][52][53][54][55][56][57][58][59][60][61], to date, there is no adsorbent material in practical use.…”

Removal of CdTe in acidic media by magnetic ion-exchange resin: A potential recycling methodology for cadmium telluride photovoltaic waste

“…In this study, Langmuir model C e /Q e = 1/(bQ max ) + C e /Q max ) and Freundlich model (ln Q e = ln K F + (1/n)ln C e ) [19] were used to determine the adsorption equilibrium between the adsorbent (PSt-DVB-SNa MPs) and cations (Cd 2+ , Te 4+ and TeO(OH) + ). The model parameters obtained by applying Langmuir and Freundlich models to the experimental In order to evaluate the kinetic mechanism which controls the adsorption process, the pseudo-first-order model ln(Q e − Q t ) = ln Q e − k 1 t and pseudo-second-order model t/Q t = 1/k 2 Q 2 e + t/Q t [20] were employed based on the experimental data (in Fig. 7).…”

“…Recently, there is a growing interest to use micro/nanoscale superparamagnetic adsorbents for the removal and preconcentration of heavy metals (Cd(II) [15][16][17], Cr(VI) [16,18], Pb(II) [15,16], As(V) [18], Hg(II) [16,19], La(III) [20], etc.) from water.…”