Search results: 1,656 results (approx.)

1. Hydrogeological investigation of sites for the geological disposal of radioactive waste.

Publisher : International Atomic Energy Agency (IAEA), Vienna, Austria

Miscellaneous : Technical Reports Series - International Atomic Energy Agency 1999 No.No. 391 pp.60 pp. ref.15

4. A testbed for underground nuclear repository design.

Author(s) : Banwart, S.; Wikberg, P.; Olsson, O.

Journal article : Environmental Science & Technology 1997 Vol.31 No.11 pp.510A-514A ref.15

5. A hydrological aspect of toxic wastes management.

The current state of the management of toxic wastes, based on European experiences, is reviewed for those concerned with waste management and environmental protection in particular, and for hydrogeologists in general.

Foreign Title :Aspectos hidrogeológicos en el manejo de desechos tóxicos.

Author(s) : Rivera, A.

Journal article : Ingenieriacutea Hidráulica en Mexacute˜ico 1997 Vol.12 No.1 pp.77-90 ref.34

6. Forest and Chernobyl: forest ecosystems after the Chernobyl nuclear power plant accident: 1986-1994.

Based on research studies over 9 yr in Belarus, this overview paper reports on the basic features of radionuclide migration and the prediction of the radionuclide redistribution and accumulation by forest phytocoenoses following the Chernobyl Nuclear Power Plant (CNPP) accident (in 1986). The...

Author(s) : Ipatyev, V.; Bulavik, I.; Baginsky, V.; Goncharenko, G.; Dvornik, A.

Journal article : Journal of Environmental Radioactivity 1999 Vol.42 No.1 pp.9-38 ref.33

7. A comparison of models for characterizing the distribution of radionuclides with depth in soils.

Six models were fitted to 21 different activity-depth profiles of radiocaesium (137Cs) derived from Chernobyl and relations between the models and the values of their parameters were determined. The advection and dispersion parameters obtained using 4 solutions to the advection-dispersion equation...

Author(s) : Smith, J. T.; Elder, D. G.

Journal article : European Journal of Soil Science 1999 Vol.50 No.2 pp.295-307 ref.27

8. Mineral associations and average oxidation states of sorbed Pu on tuff.

The sorption of dissolved Pu(V) on a natural zeolitic tuff that was equilibrated with synthetic groundwater was examined using synchrotron-based micro-analytical techniques. The tuff contained trace quantities of smectites and iron and manganese oxides, which are present as fracture fill and pore...

Author(s) : Duff, M. C.; Hunter, D. B.; Triay, I. R.; Bertsch, P. M.; Reed, D. T.; Sutton, S. R.; Shea-McCarthy, G.; Kitten, J.; Eng, P.; Chipera, S. J.; Vaniman, D. T.

Journal article : Environmental Science & Technology 1999 Vol.33 No.13 pp.2163-2169 ref.46

9. A new method for determining the bioavailability of radionuclides in the soil solution.

A new method for determining the pool of radionuclides in the soil solution, available for root uptake, is compared to existing methods. The new method is based on extracting the soil solution at a soil moisture below saturation. It used the soaking capacity of a polyacrylamide resin deposited on a ...

Author(s) : Jouve, A.; Lejeune, M.; Rey, J.

Journal article : Journal of Environmental Radioactivity 1999 Vol.43 No.3 pp.277-289 ref.11

10. Distribution of natural radionuclides and 137Cs in soils of southwestern Ontario.

Radionuclides 40K, 226Ra, 232Th and 137Cs were measured in the soils of southwestern Ontario, Canada, in order to determine the background levels of radiation and to understand the soil profile distribution. Clay content was the most important variable which affected the background levels of 40K, ...

Author(s) : VandenBygaart, A. J.; Protz, R.; McCabe, D. C.

Journal article : Canadian Journal of Soil Science 1999 Vol.79 No.1 pp.161-171 ref.35

11. Modelling long-term contaminant migration in a catchment at fine spatial and temporal scales using the UP system.

A method was developed to simulate the long-term migration of radionuclides in the near-surface of a river catchment, following their release from a deep underground repository for radioactive waste. Previous (30-year) simulations, using the SHETRAN physically based modelling system, showed that...

Author(s) : Sloan, W. T.; Ewen, J.

Journal article : Hydrological Processes 1999 Vol.13 No.6 pp.823-846 ref.23

12. Implications of sorption kinetics to radionuclide migration in fractured rock.

A new model framework for transport of radionuclides in fractured rock, which includes sorption kinetics and surface diffusion, is developed and verified experimentally. Interpretations of two types of complementary batch tests indicate that sorption kinetics in the rock matrix is governed by...

Author(s) : Xu ShuLan; Wörman, A.

Journal article : Water Resources Research 1999 Vol.35 No.11 pp.3429-3440 ref.26

13. Speciation of Europium(III) sorbed on a montmorillonite surface in the presence of polycarboxylic acid by laser-induced fluorescence spectroscopy.

Laser-induced fluorescence spectroscopy was applied for the characterization of Eu(III) species sorbed on organic-inorganic hybrids such as montmorillonite coated with poly-(acrylic acid) or poly(methacrylic acid) in aqueous solution (suspension). The emission lifetime and the emission spectra of...

Author(s) : Takahashi, Y.; Kimura, T.; Kato, Y.; Minai, Y.

Journal article : Environmental Science & Technology 1999 Vol.33 No.22 pp.4016-4021 ref.27

14. Radium isotopes as indicators of adsorption-desorption interactions and barite formation in groundwater.

Borewater monitoring near the Ranger U mine tailings dam (Darwin, Australia) showed deterioration in water quality in several bores since 1981, with increases in sulfate concentrations of up to 1000 times. In some cases, significant increases in 226Ra concentrations occurred. In this study,...

Author(s) : Martin, P.; Akber, R. A.

Journal article : Journal of Environmental Radioactivity 1999 Vol.46 No.3 pp.271-286 ref.27

15. Iodine-129 in rainfall over Germany.

Concentrations of 129I in rain, total deposition of 129I and 129I:127I isotope ratios at five sampling sites distributed over West Germany were determined in 1994 and 1995 by neutron activation analysis. The different species of 129I in rain water - 129I attached to particulate matter, inorganic...

Author(s) : Krupp, G.; Aumann, D. C.

Journal article : Journal of Environmental Radioactivity 1999 Vol.46 No.3 pp.287-299 ref.14

16. Caesium contamination and vertical distribution in undisturbed soils in Croatia.

The deposition and vertical distribution of 137Cs and 134Cs in the first 25 cm of undisturbed soil profiles were studied at more than 50 locations in Croatia. The relative contributions of fallout from weapons-testing and the Chernobyl accident-derived fallout to the total 137Cs deposition were...

Author(s) : Barišić, D.; Vertačnik, A.; Lulić, S.

Journal article : Journal of Environmental Radioactivity 1999 Vol.46 No.3 pp.361-374 ref.15

17. Long-term variation of radiocaesium in the food chain of lamb in the Faroe Islands.

Radiocaesium has been measured in the food chain of lamb for eight years in nine uncultivated pastures in the Faroe Islands. Soil, grass and lamb meat were studied in 1990-97, and lamb faeces in 1995-97. The deposition was attributable to weapon tests and the Chernobyl accident with the largest...

Author(s) : Joensen, H. P.

Journal article : Journal of Environmental Radioactivity 1999 Vol.46 No.3 pp.345-360 ref.13

18. Distribution of 137Cs in surface soils as affected by forest clear-cutting.

The distribution of 137Cs (originating from the Chernobyl accident in Belarus in 1986) was studied in podzol soil profiles from a 5-yr-old forest clear-cut area and an adjacent mature spruce forest (Picea abies) in central Norway to assess the effects of clear felling on the distribution and...

Author(s) : Berthelsen, B. O.; Steinnes, E.; Næumann, R.

Journal article : Journal of Environmental Radioactivity 1999 Vol.42 No.1 pp.39-49 ref.33

19. Genetic and environmental variations in water-extractable arabinoxylans content and flour extract viscosity.

On the basis of their extractability properties, arabinoxylans (AX), which are located in the cell walls of cereals, are separated into water extractable (WeAx) and water-unextractable types. Data are presented here on the heritability of several WeAx parameters and viscosity measurement for 19...

Author(s) : Martinant, J. P.; Billot, A.; Bouguennec, A.; Charmet, G.; Saulnier, L.; Branlard, G.

Journal article : Journal of Cereal Science 1999 Vol.30 No.1 pp.45-48 ref.12

20. Leaching of 137Cs and 90Sr contaminated soils by FeCl3 and NH4Cl solutions.

The leaching of 137Cs and 90Sr radionuclides contaminated soils by solutions of FeCl3 and NH4Cl in batch (static), column (continuous-flow) and field (Chernobyl region in Russia) experiments is investigated. The eluent solution is a 1:1 mixture of 0.01-0.02 mol/litre FeCl3 and NH4Cl. The...

Author(s) : Dibrov, I. A.; Chirkst, D. E.; Chaliyan, K. N.

Journal article : Environmental Technology 1999 Vol.20 No.6 pp.575-585 ref.20

21. Temporal change in fallout 137Cs in terrestrial and aquatic systems: a whole ecosystem approach.

During the years after a nuclear accident, the bioavailability and environmental mobility of radiocaesium declines markedly, resulting in large changes in contamination of foodstuffs, vegetation, and surface waters. Predicting such changes is crucial to the determination of potential doses to...

Author(s) : Smith, J. T.; Fesenko, S. V.; Howard, B. J.; Horrill, A. D.; Sanzharova, N. I.; Alexakhin, R. M.; Elder, D. G.; Naylor, C.

Journal article : Environmental Science & Technology 1999 Vol.33 No.1 pp.49-54 ref.36

22. Sequential extractions for the study of radiocaesium and radiostrontium dynamics in mineral and organic soils from Western Europe and Chernobyl areas.

To study radiostrontium (RSr) and radiocaesium (RCs) aging in soils, three sequential extraction schemes were used on Mediterranean loamy (Calcic Luvisol) and sandy-loam (Fluvisol) soils, Podzols and peaty Podzols (Terric Histosol) from the area near Chernobyl, Ukraine, and peats from Western...

Author(s) : Rigol, A.; Roig, M.; Vidal, M.; Rauret, G.

Journal article : Environmental Science & Technology 1999 Vol.33 No.6 pp.887-895 ref.23

23. Runoff and erosion response of simulated waste burial covers in a semi-arid environment.

The runoff and erosion response of two perennial grass species on simulated waste burial covers at Idaho National Engineering and Environmental Laboratory (INEEL), USA was evaluated. Rainfall simulations were applied to three plots covered by crested wheatgrass [Agropyron desertorum], three plots...

Author(s) : Bent, G. C.; Goff, B. F.; Rightmire, K. G.; Sidle, R. C.

Journal article : Journal of the American Water Resources Association 1999 Vol.35 No.2 pp.441-455 ref.46

24. Predicting soil to plant transfer of radiocesium using soil characteristics.

A model is presented that dynamically estimates the radiocaesium activity in herbage from readily available soil parameters. Three key properties underlying the bioavailability of radiocaesium were estimated in the model: (1) the labile radiocaesium distribution coefficient (kdl), (2) the solution...

Author(s) : Absalom, J. P.; Young, S. D.; Crout, N. M. J.; Nisbet, A. F.; Woodman, R. F. M.; Smolders, E.; Gillett, A. G.

Journal article : Environmental Science & Technology 1999 Vol.33 No.8 pp.1218-1223 ref.30

25. Distribution of natural radionuclides in sequentially extracted fractions of sediments from a marsh area in Southwest Spain: U isotopes.

A study of the distribution of U in different fractions of intertidal sediments collected in a marsh area enhanced by the radioactive wastes discharged from a fertilizer complex has been carried out. The study has shown that U isotopes are mainly located in non-residual fractions of the sediments....

Author(s) : Martínez-Aguirre, A.; Periañez, R.

Journal article : Journal of Environmental Radioactivity 1999 Vol.45 No.1 pp.67-80 ref.20