The speciation, stability, solubility and biodegradation of organic co-contaminant radionuclide complexes: a review.
The potential migration of radionuclides is of concern at contaminated land sites and, in the long term, waste repositories. Pathways of migration need to be characterised on a predictive level so that management decisions can be made with confidence. A pathway that is relatively poorly understood at present is radionuclide solubilisation due to complexation by organic complexing agents that are present in mixed radioactive wastes, and at radioactively contaminated land sites. Interactions of the complexing agents with radionuclides and the host environment, and the response to changes in the physicochemical conditions make their role far from simple to elucidate. In addition, chemical and biodegradation of the organic materials may be important. In this paper, key co-contaminant organics are reviewed with emphasis on their environmental fate and impact on radionuclide migration.
Keith-Roach
Miranda J
MJ
Biogeochemistry and Environmental Analytical Chemistry Group/Consolidated Radio-isotope Facility, School of Earth, Ocean and Environmental Sciences, University of Plymouth, Drake Circus, Plymouth PL4 8AA, UK. mkeith-roach@plymouth.ac.uk
D004777:Environment; D006256:Hazardous Waste; D009930:Organic Chemicals / Q000737:chemistry* / Q000378:metabolism; D011868:Radioisotopes / Q000737:chemistry* / Q000378:metabolism; D012989:Soil Pollutants / Q000737:chemistry* / Q000378:metabolism; D012990:Soil Pollutants, Radioactive / Q000737:chemistry* / Q000378:metabolism; D012995:Solubility; D006113:United Kingdom; D014481:United States
D006256:Hazardous Waste; D009930:Organic Chemicals; D011868:Radioisotopes; D012989:Soil Pollutants; D012990:Soil Pollutants, Radioactive