Association of dissolved radionuclides released by the Chernobyl accident with colloidal materials in surface water

Molecular size distribution of Pu in the presence of humic substances in river and groundwaters

“…The dominant size fraction was 30k-3k Da. Matsunaga et al 10 have shown that the major part of dissolved 239,240 Pu in the Sakhan…”

“…[2][3][4] Some parts of actinides and lanthanides in natural waters are associated with anionic organic materials, especially humic substances (humic and fulvic acids) in the different molecular size fractions. [5][6][7][8][9][10] The authors have reported the complexation properties of humic substances with actinides-lanthanides such as Eu, Am and Pu [11][12][13][14] . These molecular size effects of humic substances on the complexation affinity and the sorption ability may significantly affect the migration behavior of actinides.…”

Determining the origin of Al in the outflow from a forest watershed of a suburban forest in Japan by analysis of size distribution

“…Schemel et al (2000) reported that Al and Fe were present as both dissolved and colloidal forms, whereas Ca and Mg were present as dissolved species in the Cement and Mineral Creeks and the Animas River, Colorado. Additionally, Matsunaga et al (2004) reported the existence of large colloidal forms of Al in surface waters near the site of the Chernobyl nuclear accident. Table 2 shows mean pH, EC, and DOC values and the concentrations of various elements in the soil extracts processed in the batch and column experiments.…”

“…Haag et al (2001) found that at pH values above 6.5, total Al concentrations were quite low and that the major species were Al(OH) 2 + , Al(OH) 4 -, and organically complexed Al in the Große Ohe River in southeast Germany. Matsunaga et al (2004) reported that Al was present as colloids in river water of approximately pH 7.0 in the vicinity of the Chernobyl accident. Kaneko et al (2003) reported that the dissolved Al is complexed with organic matter in stream water having neutral pH in Kyoto Prefecture, Japan.…”

Particulate Phases Possibly Conveyed from Nuclear Waste Repositories by Groundwater

“…The role played by the colloidal phase is intensely investigated not only for groundwater, but also for terrestrial surface water, namely for streams and lakes (Aleksandrova et al, 2010;Bondareva, 2011;Matsunaga et al, 2004;Monte, 2010;Monte et al, 2009;Ollivier et al, 2011;Semizhon et al, 2010), for estuarine water (Barros et al, 2004;Eyrolle & Charmasson, 2004;Porcelli et al, 1997), for sea water (Bowie et al, 2010;Otosaka et al, 2006;Scholten et al, 2005) or for soil water Maity et al, 2011;Matisoff et al, 2011;Rachkova et al, 2010;Seliman et al, 2010;Xu et al, 2011). The colloid-radionuclide interaction is important not only from the perspective of their migration.…”