EDP Sciences logo
Authentification abonné
Rechercher
Menu
Numéro
J. Phys. Colloques
Volume 40, Numéro C2, Mars 1979
International Conference on The Applications of The Mössbauer Effect
Page(s) C2-347 - C2-349
DOI https://doi.org/10.1051/jphyscol:19792123
International Conference on The Applications of The Mössbauer Effect

J. Phys. Colloques 40 (1979) C2-347-C2-349
DOI: 10.1051/jphyscol:19792123

CHEMICAL STATE ANALYSIS OF HYDROLYSIS PRODUCTS OF IRON (III) SALT SOLUTIONS BY MEANS OF MÖSSBAUER SPECTROMETRY

Y. Ujihira and M. Ohyabu

Faculty of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo, Japan


Résumé
Des ions Fe(III) sont hydrolysés à pH = 1,2 ~ 1,8 et les composés α-FeOOH, β-FeOOH ou NaFe3 (SO4)2(OH)6 sont précipités en présence de Br- (NO3-), Cl- (F-) et SO4-- respectivement. Le rapport β-FeOO/α-FeOOH change de 0 à 1, quand Cl-/Fe(III) en solution varie de 0 à 1. Cl- est fortement lié à β-FeOOH (Cl/Fe = 0,147) alors que Br- est faiblement absorbé sur α-FeOOH (Br/Fe = 0.0125).


Abstract
Hydrolysis of iron (III) proceeds at pH 1,2 ~ l.8 and α-FeOOH, β-FeOOH or NaFe3(SO4)2(OH)6 are precipitated in the presence of Br- (NO3-), Cl- (F-) and SO42- respectively. Ratio of β-FeOOH/α-FeOOH changed from 0 to 1, as Cl-/Fe(III) in the solution varied from 0 to 1. Cl- is tightly bound into β-FeOOH (Cl/Fe = 0.147), whereas Br- is adsorbed loosely on the α-FeOOH (Br/Fe = 0.0125).