Nano-cerium vanadate: a novel inorganic ion exchanger for removal of americium and uranium from simulated aqueous nuclear waste

Banerjee, Chayan ; Dudwadkar, Nilesh ; Tripathi, Subhash Chandra ; Gandhi, Pritam Maniklal ; Grover, Vinita ; Kaushik, Chetan Prakash ; Tyagi, Avesh Kumar (2014) Nano-cerium vanadate: a novel inorganic ion exchanger for removal of americium and uranium from simulated aqueous nuclear waste Journal of Hazardous Materials, 280 . pp. 63-70. ISSN 0304-3894

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jhazmat.2014.07.026

Abstract

Cerium vanadate nanopowders were synthesized by a facile low temperature co-precipitation method. The product was characterized by X-ray diffraction and transmission electron microscopy and found to consist of ∼25 nm spherical nanoparticles. The efficiency of these nanopowders for uptake of alpha-emitting radionuclides 233U (4.82 MeV α) and 241Am (5.49 MeV α, 60 keV γ) has been investigated. Thermodynamically and kinetically favorable uptake of these radionuclides resulted in their complete removal within 3 h from aqueous acidic feed solutions. The uptake capacity was observed to increase with increase in pH as the zeta potential value decreased with the increase in pH but effect of ionic strength was insignificant. Little influence of the ions like Sr2+, Ru3+, Fe3+, etc., in the uptake process indicated CeVO4 nanopowders to be amenable for practical applications. The isotherms indicated predominant uptake of the radioactive metal ions in the solid phase of the exchanger at lower feed concentrations and linear Kielland plots with positive slopes indicated favorable exchange of the metal ions with the nanopowder. Performance comparison with the other sorbents reported indicated excellent potential of nano-cerium vanadate for removing americium and uranium from large volumes of aqueous acidic solutions.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Cerium vanadate; Co-precipitation; Uranium; Americium; Kielland Plot; Sorption Isotherm
ID Code:109002
Deposited On:01 Feb 2018 11:35
Last Modified:01 Feb 2018 11:35

Repository Staff Only: item control page