Influence of competitive eluting agents on REEs recovery from silica gel adsorbent with immobilized aminodiphosphonic acid

Overview of Functionalized Porous Materials for Rare-Earth Element Separation and Recovery

“…Artiushenko et al were able to quantitatively pre-concentrate a constant amount of REEs from contaminated water with pH ≥ 3 on a silica-based adsorbent with covalently immobilized amino-bis (methylenephosphonic acid) (SiO 2 -AdPA). The complete desorption of all REEs was achieved using a 10-2 mol/L EDTA solution (pH = 8.0), whereas the acidic treatment required 1.0 mol/L of HNO 3 [ 64 ]. The above studies have shown that this type of adsorbent is completely stable in at least three consecutive adsorption/desorption cycles, with no degradation of its adsorption properties, good reusability, and better affinity for rare-earth elements than the bulk silica with different functional groups.…”

Adsorption-based Separation and Recovery of Rare Earth Elements

“…The ion-exchange resin containing phosphonic acid-based groups are considered weakly acidic cation-exchange resins similar to carboxyl-based ion-exchange resins and are dependent on pH. Additionally, P-based chelating ligands have been used as functional groups in different chelating resin (Callura et al, 2019;Hérès et al, 2018) and functionalized adsorbents (Figure 1) (Artiushenko, Kostenko, et al, 2020;Bertelsen et al, 2019;Callura et al, 2018;de Decker et al, 2016;Kavun et al, 2021;Noack et al, 2016;Z. .…”

“…Functional ligands grafted on the silica gel for REEs adsorption are 4-acylpyrazolone Schiff base (Amarasekara et al, 2009), diglycolamic acid (Ogata et al, 2014(Ogata et al, , 2015a(Ogata et al, , 2015b(Ogata et al, , 2016, 1-(-2-pyridylazo) naphthol (PAN) , acetylacetone , phosphonoacetic acid (PAA), N, N-bis(phosphonomethyl) glycine (BPG), diethylenetriaminepentaacetic dianhydride (DTPADA) (Callura et al, 2018;Noack et al, 2016), diethylenetriaminepentaacetic acid (DTPA) (Noack et al, 2016), diglycolamide (Zhe Liu et al, 2019) N-Benzoyl-N-phenylhydroxylamine (BPHA) (Artiushenko, Ávila, et al, 2020), amino-di(methylene-phosphonic) acid (Artiushenko, Kostenko, et al, 2020), N, N-dioctyldiglycolic acid (DODGA) (Li et al, 2020), polyhexamethylene guanidine and Arsenazo I or Arsenazo III (Losev et al, 2020), and bis(ethylhexyl)amido diethylenetriaminepentaacetic acid (Hovey et al, 2021).…”

Postsynthetic of MIL-101-NH2 MOFs supported on PVDF membrane for REEs recovery from waste phosphor

“…[14][15][16][17][18] The stability and adsorption capacity of an adsorption material mainly depend on the stability of the used material itself and on the binding affinity between functional active sites and REEs. 19,20 Nowadays, many sorbents have been employed for REE separation, such as silica gel bound sorbents, 21,22 carbon nanotubes, 23 and kaolinite, 24 and ionic imprinted materials 25 and so on 26 have been employed for REE adsorption and separation.…”