Influence of humic acids on the actinide migration in the environment: Suitable humic acid model substances and their application in studies with uranium-a review
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Publication Details
Output type: Journal article
Author list: Sachs S., Bernhard G.
Publisher: Springer
Publication year: 2011
Journal: Journal of Radioanalytical and Nuclear Chemistry (0236-5731)
Volume number: 290
Issue number: 1
Start page: 17
End page: 29
Number of pages: 13
ISSN: 0236-5731
eISSN: 1588-2780
URL: http://api.elsevier.com/content/abstract/scopus_id:80055019094
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Open access status: closed
Abstract
Humic acids (HA) can influence the speciation of metal ions, e.g., actinide ions, and thus their migration in the environment. Therefore, knowledge of the impact of HA on the actinide migration is required to assess their transport in natural systems. However, due to the complex and heterogeneous nature of HA, there are a lot of difficulties in the thermodynamic description of their geochemical interaction behavior. A more basic understanding of the interaction processes of HA can be obtained by investigations applying HA model substances with more specific and tailored properties. This work gives a review of selected types of HA model substances (HA-alike melanoidins, synthetic HA with pronounced redox functionality, modified HA with blocked phenolic/acidic OH groups, synthetic humic substance-clay-associates), their synthesis, isotopic labeling, and characterization in comparison to isolated natural HA. Examples for their application in various geochemical studies, such as complexation, redox, sorption and migration studies with uranium as representative for actinides are presented. © 2011 Akadémiai Kiadó, Budapest, Hungary.
Keywords
Application, Humic acids, Labeling, Model substances, Modification, Synthesis, Uranium
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