Kinetic transfer coefficients for radionuclides in estuarine waters: Reference values from133Ba and effects of salinity and suspended load concentration

In estuarine environments there are important spatial and temporal changes in both salt and suspended load concentrations. An experimental procedure have been developed to produce kinetic parameters being representative of the natural environment studied, and we have investigated the effect of salinity and suspended load concentration to the kinetics of the uptake. These results are encouraged by recent advances in environmental modelling concerning to radionuclide dispersion in aquatic natural systems and involving non-equilibrium processes. Experiments are carried out with unfiltered water samples from the Odiel estuary (Southwest of Spain), with133Ba tracer to illustrate experimental procedures.

[1]  Raúl Periáñez,et al.  Modelling the dispersion of non-conservative radionuclides in tidal waters—Part 1: Conceptual and mathematical model , 1996 .

[2]  D. Walling,et al.  Interpreting particle size effects in the adsorption of 137Cs and unsupported 210Pb by mineral soils and sediments , 1996 .

[3]  P. Santschi,et al.  Partition of radiotracers between suspended particles and seawater , 1984 .

[4]  M. García-León,et al.  Radium isotopes in suspended matter in an estuarine system in the southwest of Spain , 1994 .

[5]  P. Beneš,et al.  Factors affecting interaction of radiostrontium with river sediments , 1990 .

[6]  M. Černík,et al.  Kinetics of radionuclide interaction with suspended solids in modeling the migration of radionuclides in rivers , 1992 .

[7]  J. Richter.  The Soil as a Reactor , 1987 .

[8]  M. García-León,et al.  Modelling the dispersion of non-conservative radionuclides in tidal waters—Part 2: Application to 226Ra dispersion in an estuarine system , 1996 .

[9]  Li Yuan-hui,et al.  The elemental composition of suspended particles from the Yellow and Yangtze Rivers , 1984 .

[10]  M. Hayes,et al.  The chemistry of soil constituents. , 1978 .

[11]  W. Evenden,et al.  Effect of sediment type, temperature and colloids on the transfer of radionuclides from water to sediment , 1994 .

[12]  P. Beneš,et al.  Kinetics of radionuclide interaction with suspended solids in modeling the migration of radionuclides in rivers , 1992 .

[13]  M. Černík,et al.  Factors affecting interaction of radiocesium with freshwater solids , 1992 .

[14]  P. Santschi,et al.  A kinetic approach to describe trace-element distribution between particles and solution in natural aquatic systems , 1984 .

[15]  P. Benes,et al.  Factors affecting interaction of radiocesium with freshwater solids , 1989 .

[16]  Yuan-hui Li,et al.  Desorption and coagulation of trace elements during estuarine mixing , 1984 .

[17]  D. Eisma,et al.  Suspended Matter in the Aquatic Environment , 1993 .