Investigation of thorium (IV) adsorptive behavior onto functionalized magnetite nanoparticles

Autor: A. Ezat, Zeinab F. Akl
Rok vydání: 2021
Předmět:
Zdroj: Journal of Radioanalytical and Nuclear Chemistry. 328:1291-1300
ISSN: 1588-2780
0236-5731
DOI: 10.1007/s10967-021-07729-5
Popis: The potential of magnetite nanoparticles functionalized with oleic acid (MNPOA) and bis(2,4,4-trimethylpentyl)dithiophosphinic acid (MNPDTPA) as efficient thorium adsorbents were evaluated. The experimental factors that control thorium adsorption capacity, e.g. pH, adsorption time, thorium initial concentration, and temperature were investigated. The adsorption data of both adsorbents fitted best to pseudo-first-order and Freundlich models. Maximum adsorption capacity at 25 °C was 370 and 454 mg g−1 for MNPOA and MNPDTPA, respectively. Temperature dependency of thorium adsorption and thermodynamics parameters were investigated. The results declared the spontaneity, feasibility, and exothermic nature of the adsorption process demonstrating that MNPOA and MNPDTPA can be used as economic alternatives for the efficient thorium removal from aqueous solutions.
Databáze: OpenAIRE