Cobalt speciation and mobility in glacial sand
The migration behaviour of cobalt in a sand-groundwater system has been studied. Batch sorption, column and diffusion experiments all showed that more than one cobalt species were present and that interconversion occurred between them. In a column experiment, cobalt complexed with natural (probably fulvic) material contained in the groundwater dissociated with a first order rate constant of 1.8 x 1.0 E-4/sec. This suggested that in a field tracer test in the Drigg borehole array, very little cobalt would reach the first sampling point. Experiments with the Co-EDTA, however, showed that although some dissociation occurred, the Co-EDTA complexes were sufficiently stable for field use. Sectioning a column through which a pulse of Co-EDTA had passed produced a complicated distribution of sorbed cobalt, which was tentatively interpreted as being due to the movement of two retarded (possibly colloidal) species.
Bibliographic Reference: EUR 13278 EN (1991) 54 pp., FS, ECU 6.25
ISBN: ISBN 92-826-0517-5
Record Number: 199110395 / Last updated on: 1994-12-02
Original language: en
Available languages: en