Adsorption of Neodymium(III) on Acrylic Resin (110 Resin) from Aqueous Solutions

Abstract

A feasibility of using 110 resin as an adsorbent for Nd(III) was examined with various chemical methods. Batch studies were carried out to determine the influence of operational conditions, such as initial pH of solution, temperature, contact time, and initial concentrations. The optimal conditions in terms of initial pH and equilibrium time was 6.0 (HAc-NaAc system) and 72 h, respectively. The maximum adsorption capacity was estimated to 308 mg/g at 298 K calculating from the Langmuir isotherm. Nd(III) ions could be well eluted by using 3.0 mol/L HCl solution and the absorbent could be regenerated and reused. Thermodynamic and kinetics parameters were studied, from which the adsorption process was spontaneous and the adsorption was endothermic in nature. The Thomas model based on the experimental column study data was used to predict the breakthrough curves and to determine the characteristics parameters of the column useful for process design. Moreover, the adsorption mechanism was proposed by the IR spectroscopic technique.

Adsorption of Scandium and Neodymium on Biochar Derived after Low-Temperature Pyrolysis of Sawdust

“…In the present study, the results of speciation analysis indicate that the main species present in solution at pH 3 are Nd 3+ and NdSO 4 + for Nd and Sc 3+ , ScSO 4 + and some ScOH 2+ for Sc. It is thus believed that the main adsorption mechanism is cation exchange between -COOH and Sc or Nd as indicated in earlier studies [40,77]. Chemical adsorption and ion exchange were also proposed as potential mechanisms during the adsorption of light REEs (Y, La, Ce, Nd and Sm) on carbon black derived from recycled tires [36].…”

Magnetic glutamine‐grafted polymer for the sorption of U(VI), Nd(III) and Dy(III)

“…Solvent extraction is highly efficient for metal recovery from high‐concentration effluents; however, the cost of these extractants and the partial loss of these hazardous organic compounds by dissolving in water make the process neither competitive nor appropriate when the concentration is less than several hundreds of mg L ‐1 . Sorption processes are usually preferred for the treatment of dilute effluents . A great diversity of sorbents has been tested for the recovery of uranium and REEs: clays and zeolite, carbon‐based sorbents, ion‐exchange and chelating resins, extractant impregnated resin, biosorbents; composite clay/biopolymer sorbents …”

“…Sorption processes are usually preferred for the treatment of dilute effluents. 14,15 A great diversity of sorbents has been tested for the recovery of uranium and REEs: clays and zeolite, [16][17][18][19][20][21][22][23][24] carbon-based sorbents, [25][26][27][28] ion-exchange and chelating resins, [29][30][31][32][33][34] extractant impregnated resin, 35 biosorbents; [36][37][38][39][40][41][42][43][44][45][46][47][48][49] composite clay/biopolymer sorbents. 50 Synthetic polymers and biopolymers have retained much attention from the research community in the field of metal recovery, profiting from their physical and chemical versatilities.…”