RadChem 2010

Session

Radionuclides in the Environment, Radioecology 4

REG4

22 Apr 2010, 05:00

Casino Conference Centre

62. Sorption behaviour of contaminants in soils: pH and humic acid effects on sorption of on CEC of clay soils and minerals, and the mobility of Cd, Cs, Ni and Sr.

Mr OLANREWAJU ANJOLAIYA (LOUGHBOROUGH UNIVERSITY)

22/04/2010, 05:00

Radionuclides in the Environment, Radioecology

Verbal

The aim of this study is to use predictive modelling to understand and calculate the sorption behaviour of radionuclide contaminants in complex environments such as clay-based soils. The effects of Natural Organic Matter (NOM) on the Cation Exchange Capacities (CEC) of different characterised clay soils (St Bees & Mercia Mudstones, Boom clay & London clay) and their constituent clay minerals...

102. Complexation of U(VI) with nitrogen and phosphorous containing ligands in aqueous solution

Ms Bianca Raditzky (Forschungszentrum Dresden-Rossendorf, Institute of Radiochemitry)

22/04/2010, 05:15

Radionuclides in the Environment, Radioecology

Verbal

The long-term safety assessment of nuclear waste disposals requires detailed knowledge of the transport and interaction behavior of actinides within the technical, geotechnical and geological barriers. In the case of accidental release of radionuclides into the surrounding environment, their migration behavior can be effectively influenced by the ambient conditions like pH, temperature, ionic...

98. Vertical and horizontal distribution of ¹³⁷Cs in zone of Chernobyl contamination in Russia

Mrs Olga Zhukova (Institute of global climate and ecology)

22/04/2010, 05:30

Radionuclides in the Environment, Radioecology

Verbal

Peculiarity of vertical migration of Cs-137 was investigated in zones of Chernobyl contamination (Bryanskaya, Orlovskaya, Tulskaya and Kaluzhskaya districts). Vertical distribution of Cs-137 on inviolate places characterizing by minimal penetration of peak of maximal concentration for the depth about 2-4 cm in dependence of type of soil and intensity of processes of byoturbation....

90. The sorption processes of Np(V) and U(VI) onto metal oxide phases. The formation of sorption complexes and mechanistic aspects studied by in situ ATR FT-IR spectroscopy

Dr Harald Foerstendorf (Forschungszentrum Dresden-Rossendorf, Institute of Radiochemistry)

22/04/2010, 05:45

Radionuclides in the Environment, Radioecology

Verbal

The migration behaviour of actinide ions in the geosphere is generally influenced by sorption processes in aqueous media. These processes occurring at solid/liquid interfaces can be monitored by in situ Attenuated Total Reflection Fourier-transform Infrared (ATR FT-IR) spectroscopy providing structural information on a molecular level.[1] In this work, the sorption of neptunium(V) onto metal...

32. Impact of U-mill tailings of the former uranium mine at Žirovski Vrh (Slovenia) on radionuclide accumulation by wetland plants

Mr Marko Černe (Jožef Stefan Institute)

22/04/2010, 06:00

Radionuclides in the Environment, Radioecology

Verbal

ABSTRACT Transfer of radionuclides into the environment is a common phenomenon and due to its potential harmful effect of particular scientific interest in the vicinity of uranium mines. Radionuclides, especially uranium and thorium decay products are discharged with U-mill tailings into the soil and water and consequently into vegetation where they accumulate. Radionuclide soil-to...

28. Transport of ¹²⁵I^-, ¹³⁷Cs⁺ and ⁸⁵Sr²⁺ in granitoidic rocks and soil

Dr Štefan Palágyi (Nuclear Research Institute Řež plc)

22/04/2010, 06:15

Radionuclides in the Environment, Radioecology

Verbal

Transport of ¹²⁵I^-, ¹³⁷Cs⁺ and ⁸⁵Sr²⁺ radionuclides in crushed granitoidic rocks and homogenized soil was studied. Two simple methods for calculation of transport parameters of these radionuclides in flow column experiments with groundwater (GW) as transport medium have been described. The first method is based on the assumption...