caa a22 4500 378927345 CHVBK 20180305123621.0 cr unu---uuuuu 161128e20041101xx s 000 0 eng 10.1524/ract.92.9.545.54969 doi (NATIONALLICENCE)gruyter-10.1524/ract.92.9.545.54969 Effect of reducing agents on the uranium concentration above uranium(IV) amorphous precipitate in Boom Clay pore water [Elektronische Daten] [Grégory Delécaut, N. Maes, P. De Cannière, L. Wang] The solubility of U(IV) amorphous precipitates was measured in Boom Clay water in the presence of reducing agents and under the in situ partial pressure of CO2(g) at 10-2.4atm. Boom Clay pore water is of the sodium bicarbonate type (NaHCO3 ∼ 10-2M) and contains about 100mg l-1 of dissolved organic carbon. The total U concentration measured after two-months equilibrating time and the 0.45μm filtration was about 10-6M and higher. This concentration is about 3 orders of magnitude higher than literature data for U(IV) solubility and may suggest the existence of colloids and/or U(VI) species. The U concentration was found decreasing as a function of time within the experimental period. Further experiments are currently performed to evaluate the contribution of the colloids and the role of organic matter. © 2004 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Delécaut Grégory aut Maes N. aut De Cannière P. aut Wang L. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/9-11/2004(2004-11-01), 545-550 0033-8230 92:9-11/2004<545 2004 92 ract https://doi.org/10.1524/ract.92.9.545.54969 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.92.9.545.54969 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Delécaut Grégory aut NATIONALLICENCE 700 1- Maes N. aut NATIONALLICENCE 700 1- De Cannière P. aut NATIONALLICENCE 700 1- Wang L. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/9-11/2004(2004-11-01), 545-550 0033-8230 92:9-11/2004<545 2004 92 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter