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Program for Session 15a

Monday 22nd June AM: Room A1/Th

15a (Oral): Geochemical Processes Controlling the Fate of Radionuclides in the Environment: Radionuclide speciation
Session chaired by Peter Santschi, Jordi Bruno & Lara Duro

09:30  Characterization of Competitive Binding of Eu(III)/Cu(II) and Eu(III)/Ca(II) to Gorleben Humic Acid
Marang L, Eidner S, Kumke M, Benedetti M & Reiller P
09:45  Kinetic Effects in the Complexation of Radionuclides with Humic Substances in the Presence of Fe(III) and Al(III)
Lippold H, Eidner S & Lippmann-Pipke J
10:00  Experimental Study of the Ternary System Uranyl(VI) – Synthesized Fulvic Acid – H2O as a Function of pH, Using ESI-MS and Optical Spectroscopies (UV-Visible, ATR-FTIR) at 25°C, 0.1 MPa
Pourtier E, Ngunyen-Trung C, Kiprop AK & Richard L
10:15  Effects of Organic Acids on Interaction of Actinides with Microorganisms
Ohnuki T, Yoshida T, Nankawa T, Suzuki Y & Francis A
10:30  Experimental Studies on Th(OH)4(am) Solubility in Presence of ISA, Gluconate or EDTA
Colàs E, Grivé M, Rojo I & Duro L
10:45  Effects of Organic Matter – Aluminium Oxide Interactions on Eu(III) Speciation
Janot N, Reiller P, Korshin GV & Benedetti MF
11:00  Adsorption of 90Sr and 239Pu on Natural Colloïds of Alpine Soil Solution
Luisier F, Steinmann P, Loizeau J-L, Krachler M, Pfeifer H-R & Froidevaux P
11:15  27Al NMR Studies of the Impact of Tank Waste Leachates on Hanford Sediment Samples
Strepka C, Mueller K, O'Day P, Chorover J, Sunkyung C & Perdrial N
11:30  Binding of Uranium to Organic-Rich Soils in an Alpine Region in Switzerland
Roquier C, Regenspurg S, Harfouche M, Froidevaux P, Steinmann P, Junier P & Bernier-Latmani R
11:45  Lu(III) Coprecipitation with Hectorite: A P-EXAFS Approach
Finck N, Schlegel M & Bosbach D
12:00  Distinct Uranium(IV) Products Result from Uranyl Reduction in Different Ferrous-Ferric Oxyhydroxide Systems
Boyanov M, Latta D, O'Loughlin E, Gorski C, Scherer M & Kemner K
12:15  Spectroscopic Studies of Uranyl Sorption in PO4 / α-Al2O3 Systems
Del Nero M, Galindo C, Halter E & Madé B

Monday 22nd June PM: Room A1/Th

15a (Oral): Geochemical Processes Controlling the Fate of Radionuclides in the Environment: Radionuclide interactions with solid phases
Session chaired by Lara Duro, Jordi Bruno & Peter Santschi

14:30  Chemosorbents for Natural and Artificial Radionuclides Detection by in situ Gamma Counting in Natural Waters
Johnson BE, Santschi PH, Schwantes JM, Douglas M & Addleman RS
14:45  Organo-Iodine Formation in Aquifer Sediments at Ambient Concentrations
Schwehr KA, Santschi PH & Kaplan DI
15:00  Reaction of U(VI) with Iron Sulfides
Alexandratos V, Behrends T & Van Cappellen P
15:15  Site-Selective Time Resolved Laser Fluorescence Spectroscopy on Ca2+-Bearing Mineral Phases Doped with Cm3+
Schmidt M, Stumpf T, Walther C, Geckeis H & Fanghänel T
15:30  Spectroscopic Comparison of Aqueous Np(VI) and U(VI) Species
Müller K, Foerstendorf H, Tsushima S, Brendler V & Bernhard G
15:45  Modeling Cesium Diffusion in a Claystone Formation
Appelo T, Wersin P, Van Loon L & Dewonck S
16:00  Spectroscopic Investigations of Uranyl Reduction by Fe-Bearing Clays
Chakraborty S, Boivin FF, Gehin A, Banerjee D, Scheinost AC, Greneche JM, Mullet M, Bardelli F & Charlet L
16:15  Structural Incorporation of Eu(III) into Calcite, Aragonite and Vaterite: A Comparitive TRLFS Study
Stumpf T, Schmidt M, Walther C, Geckeis H & Fanghänel T
16:30  Structural Incorporation of Neptunyl(V) into Calcite – Interfacial Reactions
Heberling F, Denecke M, Luetzenkirchen J & Bosbach D
16:45  Temporal Variations in the Export of REE in Boreal Catchments of Varying Character and Size
Köhler S, Lidman F, Hassellöv M, Stolpe B, Mörth M, Björkvald L & Laudon H
17:00  The Colloid Formation and Migration (CFM) Project at the Grimsel Test Site (Switzerland): Results from the Homologue Tests
Schäfer T, Seher H, Hauser W, Walther C, Degueldre C, Yamada M, Suzuki M, Missana T, Alonso U, Trick T & Blechschmidt I
17:15  Uranium Stability in Near-Surface Environments: Lessons from the Study of Depleted Uranium Munitions
Vaughan D, Alvarez R, Bryan N, Fomina M, Gadd G, Handley-Sidhu S, Keith-Roach M, Livens F & Lloyd J

Tuesday 23rd June AM: Room A1/Th

15a (Oral): Geochemical Processes Controlling the Fate of Radionuclides in the Environment: Radionuclide Transport Processes
Session chaired by Jordi Bruno, Peter Santschi & Lara Duro

09:30  Comparison of Iodine and Selenate Retention Mechanisms onto Cementitious Materials
Rojo I, Colàs E, Grivé M, Rovira M & Duro L
09:45  Uranium Transport at the Intermediate Scale: Micro-Scale Causes of Macro-Scale Effects
Miller A, Rodriguez D & Honeyman B
10:00  Hyperaccumulation of U in Organic-Rich Alpine Soils, Dischma Valley, Davos, Switzerland
Steinmann P, Regenspurg S, Roquier C, Bernier-Latmani R, Sager F & Froidevaux P
10:15  Extremophile Bacteria: Ultimate Sink for U(VI) from Contaminated Mine Water?
Romero-Gonzalez M, Nwaobi B & Gilmour J
10:30  Green Rust Interaction with Cerium
Nedel S, Dideriksen K, Christiansen B, Bovet N & Stipp S
10:45  Sources, Distributions and Transport Processes of Pu Isotopes in the NW Pacific Margin
Zheng J & Yamada M

Tuesday 23rd June PM: Room ICE

15a (Poster): Geochemical Processes Controlling the Fate of Radionuclides in the Environment

207  Seven Years Record of 127I and 129I in Precipitation
Aldahan A, Persson S, Possnert G & Hou X
208  Competitive Sorption and Desorption of Arsenate and Uranium on Bentonite and Kaolinite
Bachmaf S, Planer-Friedrich B & Merkel BJ
209  Sorption of U(VI) onto K-Birnessite
Baik MH & Kang KC
210  An Experimental Investigation of U(IV) Aqueous Complexation with Citric Acid, NTA and EDTA
Barger M & Haas J
211  Identification of Green Rust in Groundwater
Christansen B, Balic-Zunic T, Dideriksen K & Stipp S
212  Diffusive Parameters of Tritiated Water (HTO) and U in Chalk
Descostes M, Gandois O, Frasca B, Radwan J, Juery A & Pili E
213  Uranium(IV) Colloids in Near-Neutral Solutions: Influences on Particle Size
Dreissig I, Weiss S, Zaenker H & Bernhard G
214  Nickel Sorption on Chlorite: Batch Experiments and Modeling
Dubois IE, Zazzi Å & Malmström ME
215  A Comparison of Cs/K Mass Ratios in Select Micas, Soils and Kaolins from the Southern Appalachian Piedmont and Coastal Plain
Elliott WC, Krogstad E & Wampler JM
216  Study and Prediction of Mobility of Colloids and Radionuclides
Fedoroff M, Lefevre G, Cerovic L & Milonjic S
217  Heavy Metals and Artificial Radionuclides Records in Floodplain Sediments of the Lower Rhône River (South – East France)
Ferrand E, Eyrolle F, Provansal M, Dufour S, Radakovitch O & Raccasi G
218  Spectroscopic Identification of Ternary Carbonate Complexes Upon U(VI) Sorption onto Ferrihydrite
Foerstendorf H & Heim K
219  Detection of Uranylarsenates in Acidic and Alkaline Solutions with Time Resolved Laser-Induced Fluorescence Spectroscopy (TRLFS)
Gezahegne W, Bachmaf S, Geipel G, Planer-Friedrich B & Merkel B
220  Kinetic Behavior and Redox Buffer Capacity of Pyrrhotite
Grivé M, Clarens F, De Pablo J, Rojo I & Duro L
221  XAFS Study of the Structural Behaviour of Monazite
Harfouche M & Farges F
222  Speciation of 129I in Environmental Samples and its Application
Hou X, Possnert G & Aldahan A
223  A New Procedure to Synthesize Fulvic and Humic Acids. Determination of their Physico-Chemical Properties Using XRD, LC-APCI-MS, and Optical Spectroscopy
Kiprop A, Ngunyen-Trung C, Pourtier E & Richard L
224  Reductive Sorption of Se(IV,VI) onto Pyrite: A µ-XRF/XAS Study
Kitamura A, Curti E & Aimoz L
225  Characterisation of Claystone Alteration Sourrounding a Long-Term Perturbed in situ Diffusion Experiment
Koroleva M, Lerouge C, Maeder U, Claret F & Gaucher E
226  Uranium and Neptunium Interactions with Biogenic Iron Minerals
Law G, Geissler A, Lloyd J, Burke I, Livens F, Denecke M, Dardenne K & Morris K
227  Incorporation of U(VI) into Biogenic Carbonates: Molecular Scale Studies
Merroun ML, Rodriguez-Navarro C, Arias JM, Bernhard G & González-Munoz MT
228  Microbial Volatilization of Inorganic Selenium Sorbed by Goethite, LDH, and Ferroselite
Peitzsch M & Kersten M
229  Natural Actinides in the Sediments Associated with the Crucea Uranium Mine (East Carpathians, Romania)
Petrescu L, Bilal E & Iatan LE
230  Sorption and Diffusion of Np(V) in Opalinus Clay
Reich T, Amayri S, Drebert J, Fröhlich D, Van Loon LR & Wu T
231  Radium Co-precipitation in Evaporitic Systems
Rosenberg YO & Ganor J
232  Indoor Radon Concentrations: The Influence of Geological Factors in Italian Study Case
Rosseti M, Batolomei P, Esposito M, Marrocchino E & Vaccaro C
233  Solubility Measurements of Hydrotalcite-Like Solid Solutions
Rozov K, Berner U & Kulik D
234  Experimetal Study of the System U(VI) – Organic Compounds – H2O as a Function of pH at 25°C, 0.1MPa
Sabater C, Nguyen-Trung C, Grivé M, Pourtier E, Kiprop A, Richard L & Duro L
235  Influence of Boundary Condition of Diffusion Test Method on Migration Parameter in Compacted Bentonite
Seida Y, Tachi Y, Yoshikawa H & Yui M
236  Modelling Microbially Mediated Redox Processes in Lake Sediments
Sena C, Molinero J, Nagaoka T, Nakamura T, Ajima S, Itoh T, Sasaki Y, Asano T & Yoshikawa H
237  The Evaluation for the Turnover Time of the Japan Sea Bottom Water by 129I
Suzuki T, Minakawa M & Togawa O
238  Ionic Diffusion and Retardation in Horonobe Sedimentary Rock: Clay-Based Model Approach
Tachi Y, Seida Y, Yotsuji K & Yui M
239  Speciation of Anthropogenic Radionuclides in Arctic Marine Environment
Travkina A & Stepanets O
240  The Mobility of U in Groundwater: A Study Done in a Semi-Arid Region of South Africa
Tredoux M, Litthauer A & Vermeulen D
241  Coupled Use of Sr and Ra Isotopes to Assess Ra Mobility and Water-Rock Interaction in Sandstone Aquifers
Vinson D, Lundy J, Dwyer G & Vengosh A
242  240Pu/239Pu Atom Ratios in Water Columns of the Japan Sea: Temporal Variation and Transport Processes
Yamada M & Zheng J