Two approaches to the study of radiocaesium partitioning and mobility in agricultural soils from the Chernobyl area

137Cs and 90Sr uptake by sunflower cultivated under hydroponic conditions

“…Nifontova et al (1989) reported, on the basis of prospecting of twelve forest and five meadow phytocoenoses from the surroundings of Bjelojarsk nuclear power plant in Russia, accumulation from 530 to 1500 Bq of 137 Cs and from 300 to 1100 Bq of 90 Sr. Studying between organic matter and mineral phase of soils in 137 Cs partition (Vidal et al, 1995;Rigol et al, 1998), modelling to identify regions affected by residues of the Chernobyl accident (van der Perk et al, 1998), laboratory experiments to predict 137 Cs root uptake after flooding (Camps et al, 2003) and field studies on the flooded areas real contaminated by 137 Cs in the Pripyat catchment (Burrough and van der Perk, 1999) were performed.…”

The desorption of silver and thallium from soils in the presence of a chelating resin with thiol functional groups

“…It represents a situation in which the cation in question is continuously being removed from solution by mechanisms such as leaching, plant or microbial uptake, or even sorption onto other surfaces, thus preventing the establishment of a single equilibration between the cations in solution and those sorbed to a particular surface. This method, known as "infinite pool desorption," involves the use of a resin such as Amberlite or Dowex (Valcke and Cremers, 1994;Vidal et al, 1995;Madruga and Cremers, 1997;Strawn et al, 1998;Maes et al, 1998Maes et al, , 1999aMaes et al, , 1999b. Other merits of this technique are that, it does not modify natural equilibria by dilution with large amounts of distilled water or other solutions; it avoids the problems of entrapment due to soil compaction, and the release of cations from physically lysed microbes inherent to centrifugation methods; it also avoids chemically induced artifacts from strong acid, salt or organic solvents used as extractants; and it avoids confusion between selectivity and desorption (Oscarson et al, 1994).…”

Determination of Metals in Soils

“…It appears to prefer surface "defects," which have been termed frayed edge and wedge sites. [259][260][261] However, understanding of caesium soil systems would benefit from direct spectroscope information.…”