Rapid and highly selective removal of lead in simulated wastewater of rare-earth industry using diglycolamic-acid functionalized magnetic chitosan adsorbents

Synthesis and characterization of magnetic mesoporous Fe3O4@mSiO2–DODGA nanoparticles for adsorption of 16 rare earth elements

“…The highest adsorbed amount for a single REE was 60.8 mg g −1 for Nd( iii ), which was close to the reported amount. 28 Other reported magnetic nanomaterials were used for the adsorption of single rare earth elements, usually Eu or Ce. In this study, the diglycolamide ligand was used to modify the magnetic nanomaterials for the further investigation of the adsorption properties for all 16 REEs and the adsorption kinetics of 8 REEs.…”

“… 26,27 Unfortunately, no previous work has been published in which magnetic nanoparticles modified with a diglycolamide ligand were used for the adsorption of REEs. There have been reports on the synthesis of magnetic nanomaterials modified with diglycolamide ligands, including diglycolamic acid-functionalized chitosan-coated Fe 3 O 4 (Fe@CS-DGA), 28 TODGA-coated magnetite nanoparticles (Fe 3 O 4 @TODGA), 29 and DGA-methacrylate-coated Fe 3 O 4 particles (Fe 3 O 4 @MC-DGA). 30 However, these materials were employed for removing Pb( ii ) and extracting Am( iii ) and Pu( iv ) in a nitric acid solution, but not for the adsorption of REEs.…”

Highly selective and sensitive probes for the detection of Cr(vi) in aqueous solutions using diglycolic acid-functionalized Au nanoparticles

“…3B); this was consistent with our earlier studies. 48,49 However, as the heavy metal ions usually exist in acidic solutions and the pH value of 4.0 can result in the precipitation of some heavy metal ions and their interference with the performance of the sensors, Fig. 1 The schematic of the probe preparation and the sensing process.…”

Insights of CMNPs in water pollution control

“…Among the various heavy metals used, the greater removal efficiency of 235.63 mg/g was observed in the neutral pH and also good rejuvenation rate of 93% is observed in the adsorption of lead ions even after five consecutive cycles. Bai et al [21] have inspected the effective removal of the lead heavy metal ions released from the rare‐earth industry with the help of chitosan Fe 3 O 4 beads stabilised with the diglycolamic acid. It is reported from the paper, that the stronger affinity between the diglycolamic acid and chitosan enhances the lead metal adsorption with an ultimate adsorption capacity of about 70.57 mg/g.…”