Ion Exchange Recovery of Palladium(II) from Acidic Solutions Using Monodisperse Lewatit SR-7

Abstract

This work focuses on the sorption recovery of palladium(II) present in chloride and chloride–nitrate(V) solutions on the commercial strongly basic anion exchanger Lewatit MonoPlus SR-7. Sorption, kinetic, and equilibrium studies were carried out using batch and dynamic methods. The basic parameters of sorption capacity, recovery degree, distribution coefficient, process rate, and half-exchange time were calculated. Effects of agitation speed, initial palladium(II) concentration, and total concentration of the chloride anions were tested. Regeneration and reuse of the resin was also investigated. The surface morphology of Lewatit MonoPlus SR-7 before and after the sorption process was described. Lewatit MonoPlus SR-7 is an efficient sorbent for Pd(II) ions (Langmuir capacity 197 mg/g), is characterized by good kinetic properties, and can be regenerated and reused repeatedly without decrease of capacity. Moreover, its capacity is high but decreases in the presence of aluminum ions and slightly increases with the temperature (313 K).

Palladium(II) Chloride Complex Ion Recovery from Aqueous Solutions Using Adsorption on Activated Carbon

“…Thanks to that, it is possible to recover those metals from diluted aqueous solutions which are usually produced during the recycling processes. Of course, other methods of recovery of those metals are known, e.g., reduction, ion exchange, − and electrodeposition. , Wołowicz and Hubicki showed that the adsorption process of Pd­(II) onto strongly basic ion exchange resins in the chloride HCl–NaCl solutions can be successfully carried out and Lewatit MP-500 is a promising resin to carry out Pd­(II) complex adsorption . The same authors demonstrated that some of the weakly basic ion exchange resins exhibit high sorption capacity.…”

Adsorptive recovery of palladium(ii) from aqueous solution onto cross-linked chitosan/montmorillonite membrane

“…spent catalysts, as well as its removal from the environment are of special interest. [5][6][7] Traditional methods are available for recovery of palladium from aqueous solutions, such as precipitation, solvent extraction, 8,9 ion-exchange 10 and adsorption. Among these techniques, adsorption is one of the promising techniques, owing to its higher enrichment factor, faster kinetics, minimal organic diluents utilization and less waste accumulation.…”

Removal of Copper(II) in the Presence of Sodium Dodecylobenzene Sulfonate from Acidic Effluents Using Adsorption on Ion Exchangers and Micellar-Enhanced Ultrafiltration Methods

“…TP220 is obtained in a nitrogen atmosphere by the N-alkylation of poly(aminomethylstyrene) cross-linked with well-dried 2-chloroalkylpyridinein dioxane in the presence of triethylamine or anhydrous potassium carbonate, while M4195 is obtained by the reaction of bis[(2-pyridylmethyl)]amine with the chloromethylated styrene-divinylbenzene copolymer (produced in the early 1970s) [23]. Our previous studies showed that a similar content of CHN elements was obtained in the case of SR7 (%C = 64.9%, %H = 9.94%, and %N = 3%) [24] and A830 (%C = 43.28%, %H = 8.41%, and %N = 16.88%) [25].…”