Interlaboratory study of sampling and characterization techniques for groundwater colloids: the Markham Clinton exercise
There is increasing evidence that many radionuclides associate with organic or inorganic colloids and that such association may affect the expected mobilities of the radionuclides in the geosphere. Thus a realistic migration model requires a knowledge both of the radionuclide loading of the colloids as well as the extent of colloid transport in the geosphere. A range of techniques including ultrafiltration, ultracentrifugation and dialysis have been used as a means of isolating or concentrating colloids in groundwater but, to date, no comparison has been made of these methods to identify possible sampling artefacts. In addition, it is clearly important to establish reliable methods for the physical and chemical characterisation, as well as natural radionuclide loading of natural groundwater colloids. During the Second Natural Analogue Workshop in 1986 at Interlaken, it was proposed that the CEC should coordinate a comparative study of sampling and analytical techniques for such colloids. This was carried out by members of the CoCo (Colloids and Complexes) Club during 1987.
Bibliographic Reference: EUR 12843 EN (1990) 31 pp., FS, ECU 5
ISBN: ISBN 92-826-1525-1
Record Number: 199011129 / Last updated on: 1994-12-01
Original language: en
Available languages: en