Behavior of Cesium in Dam Reservior-Investigation Based on Sediment Columns

Abstract

<p align="justify"> <span style="font-family:Verdana;">To generate information for better understanding of the behavior of cesium in relatively closed water bodies, experiments using four columns consisted of the sediment phase and the overlying water phase, together with batch sorption experiments were conducted, and the kinetics and the binding potential of cesium by sediment were investigated. Through model analysis with both the first order and the pseudo-second order reaction models, the kinetic parameters of cesium within the four columns were determined. In addition, by analyzing batch equilibrium data with both Freundlich and Langmuir isotherm models, associated sorption parameters were also generated. Comparisons of the models’ suitability for description of both kinetics and binding capacity of cesium were thus made, and the effects of pH and EC on the binding capacity were also studied.</span> </p

Sorption Characteristics of Cesium Onto Reservoir Sediment

“…In a previous study, using four columns packed with sediment samples collected from a freshwater reservoir, we studied the behavior of cesium in relatively closed water bodies, and found that both the first order and the pseudo-second order kinetic models could well describe the sorption kinetics of cesium in columns operated under both aerobic and anaerobic conditions 11) . To generate more information for better understanding the behavior of cesium in relatively closed water bodies, the present study was conducted by focusing mainly on the sorption equilibrium of cesium on sediment.…”

VARIATION OF SPECIFIC ACTIVITY OF137Cs IN THE BOTTOM GROUND OF WATER RESERVOIRS AND WATERSIDE SOIL IN VILNIUS CITY, LITHUANIA

“…The activity level of the radiocesium is usually indicated in soil and sea water, however, for the past decade more and more attention has been drawn to the investigation of radiocesium in river and lake waters It is known that close lakes and water objects with sufficiently high water retention perform as accumulators of long-lived radionuclides [2,3]. They can content a high concentration of long-lived radionuclides in the water and bottom sediments [4,5]. The bottom sediments of the lake are the most important element of the water environment acting as a "filter" of radionuclides or as a temporary sink of radionuclides [6].…”