Theoretical and experimental insights about the adsorption of uranyl ion on a new designed Vermiculite-Polymer composite
Tarih
2022Üst veri
Tüm öğe kaydını gösterÖzet
A new Polyacrylamide (PAA)-Vermiculite (V) composite was synthesized and characterized with the help
of FTIR, SEM, and PZC analyses. The effects of ion concentration, pH and ionic strength parameters to
adsorption process were investigated in detail. The obtained data were analyzed and discussed in the
light of the Langmuir, Freundlich and Dubinin-Radushkevich (DR) models. It was shown that the adsorp-
tion of UO2
2+ increased with the increasing of the pH while the increasing or decreasing of the ionic
strength did not lead to significant changes in adsorption process. The adsorption of uranyl ion on new
designed material followed an endothermic and spontaneous process with increased disorderliness at
adsorbate/adsorbent interface. It was noticed that the adsorption process exhibits a pseudo-second-
order kinetics. The interaction mechanism regarding to the interaction between uranyl ion and new
designed Polyacrylamide (PAA)-Vermiculite (V) composite was highlighted in the light of Density
Functional Theory (DFT) calculations. Both theoretical and experimental analyses made proved that
the designed new material with a adsorption capacity of 0.375 mol kg 1 is a potential adsorbent for effec-
tive removal of uranyl ions from solutions.
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https://reader.elsevier.com/reader/sd/pii/S0167732222002641?token=97FC9267F00B9EF50A162C9D67C1AD0D74DBA7A703589614C533B811FD9213D61DA594ABD1613FD96BA668B2FB59BBDF&originRegion=eu-west-1&originCreation=20230406123035https://hdl.handle.net/20.500.12418/13390