Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.chemosphere.2020.126331
Document accepted manuscript
Title (Primary) Novel multifunctional ion exchangers for metal ions removal in the presence of citric acid
Author Araucz, K.; Aurich, A.; Kołodyńska, D.
Source Titel Chemosphere
Year 2020
Department UBZ
Volume 251
Page From art. 126331
Language englisch
Keywords La(III), Ni(II); Citric acid; Purolite S957; Diphonix Resin®; Remediation; Sorption; Spent batteries
Abstract The present study deals with the potential application of Purolite S957 and Diphonix Resin® for the removal of rare earth elements from aqueous liquors as a result of the extraction of spent Ni-MH batteries in the presence of citric acid. The effects of the metal ion and the citric acid ratio, pH, ion exchanger dose, contact time, initial concentration and temperature were studied using the batch technique. The Langmuir and Freundlich adsorption isotherm models were used for the description of the adsorption process. The equilibrium adsorption data were fitted using the pseudo first order, pseudo second order, intraparticle diffusion, Boyd, film diffusion and Dumwald-Wagner models. The maximum adsorption capacity q0 obtained from the Langmuir isotherm was found to be 46.63 mg/g for Ni(II) and 60.75 mg/g for La(III) on Purolite S957 as well as 46.55 mg/g for Ni(II) and 60.12 mg/g for La(III) on Diphonix Resin®. The kinetics followed the pseudo second order reaction. Based on the Weber-Morris model the adsorption process proved to proceed in two stages. Based on the Boyd model the rate controlling steps were film and intraparticle diffusions. The adsorption process was spontaneous and endothermic in nature. Reusability of ion exchangers in the desorption studies was also evaluated as a sustainable approach. The physicochemical properties of Purolite S957 and Diphonix Resin® were studied using the ASAP analysis, optical and scanning electron microscopy, potentiometric titration, pHZPC and FT-IR as well as XPS analysis.
Persistent UFZ Identifier
Araucz, K., Aurich, A., Kołodyńska, D. (2020):
Novel multifunctional ion exchangers for metal ions removal in the presence of citric acid
Chemosphere 251 , art. 126331 10.1016/j.chemosphere.2020.126331