The Influence of Organics in Field Migration Experiments

Abstract

Within the European Commission's MIRAGE II research programme, attention has been focused on the potential for natural and anthropogenic organic compounds to complex and mobilize radionuclides. As part of this study, an array of boreholes has been constructed in a shallow confined glacial sand aquifer at Drigg in Cumbria, so that in situ radio-tracer tests can be performed in the presence of organics, under controlled conditions of groundwater flow. The effect of organics on radionuclide mobility was also studied in the laboratory using batch sorption and column experiments, and the results used to predict the outcome of a field test with the Co-EDTA complex.

The role of organic complexants and microparticulates in the facilitated transport of radionuclides

“…and llvvic macromolecules) and inorganic microparticulatd colloidal materials that are suspected of acting as vehicles for the facilitated transport of radionuclides and other contaminants of interest (Wobber 1991;Williams et al 1991;, Lieser et al 1990Ramsay 1988;Choppin 1988;Jensen and Jensen 1988;and Boggs et al 1985). If significant size and speciation diversity does exist in the smaller submicron range, then ultrafiltration would seem an appropriate means of Results Table 3.4 Charge speciation and particulate natures of selected radionuclides (1991) separating individual migration species into "purer"…”

The migration of radionuclides237Np,238Pu and241Am in a weak loess aquifer: A field column experiment

“…Due to the long half-lives of *Author for correspondence (E-mail: Liucl@pku.edu.cn). 237 Np, 238 Pu and 241 Am, their migration in aquifers is of great interest and a considerable amount of laboratory and field works concerning the distribution of these nuclides in environmental media and physic-chemical reaction has been performed [1][2][3][4][5][6], while limited data on the migration of these radionuclides in aquifers has been reported [7][8][9]. This paper reports the result of a field column experiment investigating the migration of 237 Np, 238 Pu and 241 Am in a weak loess aquifer.…”