Study of the interactions between organic matter and transuranic elements
The study of the occurrence of humic substances present in natural waters and their physico-chemical properties, in particular their complexing behaviour, constitutes the main objective of this research programme. In the first part, the report presents the description of the selected aquifer (representative of a granitic geological formation: Fanay-Augères), the method for the collection and concentration of the humic substances (a sorption technique), and their characterisation by different physico-chemical techniques (elementary and mineral composition, spectroscopic properties, size, proton capacity, datation). The results show that Fanay-Augères humic substances (considered as site-specific humic substances) represent 41% of the total organic carbon (TOC) present in the aquifer (2 ppm) and have properties similar to other aquatic humic substances. The second part describes the study of the interactions occurring between these humic substances and trivalent cations (Eu and Am). Two different analytical methods were developed to perform these investigations: spectrophotometry and size-exclusion chromatography. Interaction constants and complexing capacities were determined and are shown to agree with literature data.
Bibliographic Reference: EUR 13651 EN (1991) 45 pp., FS, ECU 5
ISBN: ISBN 92-826-2909-0
Record Number: 199111148 / Last updated on: 1994-12-02
Original language: en
Available languages: en