Selective sorption of U(VI) from aqueous solutions using a novel aminated Fe3O4@SiO2/PVA nanofiber adsorbent prepared by electrospinning method

Abstract

A novel electrospun Fe 3 O 4 @SiO 2 @APTES/ PVA nanofiber adsorbent for U(VI) sorption was synthesized and characterized by FTIR, SEM, BET and TG analyses. The effects of pH, nanoparticles content, adsorbent dose, contact time, initial U(VI) concentration, temperature and co-existing ions were studied in batch experiments. The sorption affinity of metal ions onto adsorbent was U. The kinetic and isotherm data were accurately described by the doubleexponential and Langmuir model, with a maximum sorption capacity of 68.96 mg/g with a pH of 5. Thermodynamic parameters were evaluated to understand the nature of sorption process. The reusability of adsorbent was determined after five sorption-desorption cycles.

CeO2–TiFe2O4 nanocomposite for effective removal of uranium ions from aqueous waste solutions

“…Fan et al [27] investigated removal of U(VI) from aqueous solutions by magnetic composite of Fe 3 O 4 @SiO 2 , showing maximum adsorption capacity of uranyl ions of 52 mg g −1 . Other reported modified magnetic nanoparticles showed moderate sorption capacities for uranyl ions and radioactive species [28][29][30][31].…”

Superparamagnetic polyvinylpyrrolidone/chitosan/Fe3O4 electrospun nanofibers as effective U(VI) adsorbents

“…During the last few years there is a considerable interest from research groups working in the field of electrospinning, towards the development of functionalized organic (polymeric), inorganic and hybrid (polymer/inorganic) electrospun (nano)fibrous adsorbents for the removal of radionuclides including U(VI), Th(IV) and Eu(III) from wastewater 38–47 …”

Magnetic solid phase extraction of lead(ii) and cadmium(ii) on a magnetic phosphorus-containing polymer (M-PhCP) for their microsampling flame atomic absorption spectrometric determinations

“…Compared to conventional adsorbents, magnetic adsorbents have some advantages including high extraction capacity, rapid extraction dynamics and high extraction efficiency. 29,[40][41][42][43][44] The amount of the magnetic adsorbent was studied in the range of 25-100 mg of magnetic adsorbent. The recoveries for Pb(II) and Cd(II) were increased and reached quantitative values at 100 mg of magnetic adsorbent.…”