Quaternary ammonium based task specific ionic liquid for the efficient and selective extraction of neptunium-Reference-Cited by-同舟云学术

Quaternary ammonium based task specific ionic liquid for the efficient and selective extraction of neptunium

Published:2017-03-15 Issue:9 Volume:105 Page:689-697
ISSN:2193-3405
Container-title:Radiochimica Acta
language:en
Short-container-title:

Author:

Gupta Nishesh Kumar¹,Sengupta Arijit²,Biswas Sujoy³

Affiliation:

1. Department of Chemistry , National Institute of Technology , Rourkela, Odisha , India

2. Radiochemistry Division, Bhabha Atomic Research Centre , Mumbai , India

3. Uranium Extraction Division, Bhabha Atomic Research Centre , Mumbai , India

Abstract

Abstract: Liquid–liquid extraction of neptunium from aqueous acidic solution using quaternary ammonium based task specific ionic liquid (TSIL) was investigated. The extraction of Np was predominated by the ‘cation exchange’ mechanism via [NpO2·Hpth]+ species for NpO2 2+, while NpO2 + was extracted in ionic liquid as [NpO2·H·Hpth]+. The extraction process was thermodynamically spontaneous while kinetically slower. Na2CO3 as strippant showed quantitative back extraction of neptunium ions from TSIL. TSIL showed excellent radiolytic stability upto 500 kGy gamma exposure. Finally, the TSIL was employed for the processing of simulated high level waste solutions revealing high selectivity of TSIL towards neptunium.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/ract-2016-2694/pdf

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