Coprecipitation of transuranium elements from alkaline solutions by the method of arising agents: XV. Coprecipitation of Np(VI) and Np(V) with manganese dioxide and Mn(OH)(2)

Authors
Bessonov, AA Gelis, AV Shilov, VP Krot, NN
Citation
Aa. Bessonov et al., Coprecipitation of transuranium elements from alkaline solutions by the method of arising agents: XV. Coprecipitation of Np(VI) and Np(V) with manganese dioxide and Mn(OH)(2), RADIOCHEMIS, 42(2), 2000, pp. 140-142
Citations number
11
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
RADIOCHEMISTRY
ISSN journal
10663622 → ACNP
Volume
42
Issue
2
Year of publication
2000
Pages
140 - 142
Database
ISI
SICI code
1066-3622(200003/04)42:2<140:COTEFA>2.0.ZU;2-L
Abstract
Coprecipitation of 10(-4) M of Np-237(VI) and 2 x 10(-7) M of a Np-237(VI) + Np-239(VI) mixture with manganese dioxide formed from MnO4- under the act ion of H2O2 Or sulfite and with Mn(ON)(2) resulting from the reduction of M nO4- with hydroxylamine from ammonia and alkaline solutions in the range fr om DH 9.3 to 7 M OH- was studied radiometrically. Neptunium is reduced to p entavalent state and coprecipitates from solutions with [OH-] < 1 M.