Showing papers in "Journal of Environmental Radioactivity in 2009"

TL;DR: The average soil radionuclides' concentrations of Kirklareli were within the worldwide range although some extreme values had been determined, and annual effective gamma doses and the excess lifetime risks of cancer were higher than the world's average.

TL;DR: It was found that an increase in temperature resulted in a higher uranium (VI) loading per unit weight of the sorbent, and the negative Delta G(0) values of uranium ( VI) at different temperatures confirmed the adsorption processes were spontaneous.

TL;DR: Current data are inadequate to derive screening values for separate organism groups and a second, higher, benchmark could aid in decision making by putting results into context on the scale of no effect to a risk of 'serious' effect.

TL;DR: The rate of thorium adsorption on expanded perlite was observed to be fast in the first hour of the reaction time and thermodynamic parameters such as DeltaG(o), DeltaH(o, and DeltaS(o) were calculated as a function of temperature.

TL;DR: The main source of radioxenon observations are strong and regular batch releases from a very limited number of radiopharmaceutical facilities in the northern and southern hemisphere, which can be up to several orders of magnitude above those attributed to nuclear power plants.

TL;DR: The objective of this study was to compile data, based on an extensive literature survey, concerning soil-to-plant transfer factors for uranium, thorium, radium, lead, and polonium, and to compare estimates currently in use.

TL;DR: Long lasting availability of some radionuclides was shown to be the source of much higher transfer in forest ecosystems than in agricultural lands, and a faster decline of muscle activity concentrations in deer occurs in the temperate zone, and in wild boar the caesium activity concentration shows no decline because of its special feeding habits.

TL;DR: The results showed that the adsorption of Cs by montmorillonite was efficient in the initial concentration (C(0) of 30 microg/L Cs nitrate solution with 20 g/L montMorillonite at room temperature, and the structure of the Cs-adsorbed or modified montmorillionite were different from that of the original one.

TL;DR: The results show that the PGTFS-COOH tested is very promising for the recovery of U(VI) from water and wastewater.

TL;DR: Radionuclide concentrations in samples of the local foodstuffs and in water samples collected in Bisichi were found to be higher than UNSCEAR reference values, revealing the pollution potential of the mining activities on the surrounding areas.

TL;DR: The radium equivalent activities in all the soil samples were lower than the limit set in the Organization for Economic Cooperation and Development (OECD) report and the dose equivalent was within the safe limit of 1mSvy(-1).

TL;DR: This article presents a review of K(d) values for uranium, radium, lead, polonium and thorium based on an extensive literature survey, including recent publications.

TL;DR: Interception of dry and wet deposited radionuclides by vegetation is a key process in radioecological models that assess ingestion doses to the population following releases of radion Euclidean radius to the atmosphere.

TL;DR: This paper presents the first global radioxenon emission inventory for nuclear power plants, based on North American and European emission reports for the years 1995-2005, and estimates were made for all power plant sites for which emission data were unavailable.

TL;DR: The results indicated the necessity to find suitable routes to decrease and/or redistribute the radionuclide of environmental interest (i.e., Ra-226) in PG wastes, consequently to reduce its radiation impacts in the surrounding environment.

TL;DR: The results indicate that the structure and extractability of DU particles released from similar sources (metallic U penetrators) will depend on the release scenarios (fire, impact) and to some extent environmental conditions.

TL;DR: Natural background gamma radiation and radioactivity concentrations were investigated from 2003 to 2005 in Kinta District, Perak, Malaysia and the radium equivalent activity, the gamma-absorbed dose rate and the mean population weighted dose rate were calculated.

TL;DR: Measurements of airborne radioactive aerosol concentration were carried out on the basis of 1-3 days samples after the Chernobyl disaster and during the period of 1992-2003 and showed clear evidence of non-global plutonium originating from the Chern Fukushima accident in the atmosphere over Lithuania.

TL;DR: Literature data on numerical values obtained for the parameters of the two most popular models for simulating the migration of radionuclides in undisturbed soils have been compiled and evaluated statistically.

TL;DR: It was found that the bioavailability of radiocaesium in spruce forest was on average seven times higher than in mixed forest and the availability factor - a function of RIP, exchangeability and cationic composition of soil solution - characterized reliably the soil-plant transfer in both spruce and mixed forest.

TL;DR: New best estimates for the solid-liquid distribution coefficient (K(d)) for a set of radionuclides are proposed, based on a selective data search and subsequent calculation of geometric means, for a limited number of rad ionuclides.

TL;DR: An overveiew of radioecological concepts, reference information on plants and soils used in the project is given and main classification schemes applied to summarize the data on radionuclide transfer to plants are also described.

TL;DR: It is estimated that maximum (90)Sr cycling can be expected to occur at 40 years post-planting, resulting in 12% of the current (90]Sr content in the trench transferred to surface soils through biomass turnover and 7% stored in tree biomass.

TL;DR: The best estimates for the solid-liquid distribution coefficients (K(d) (Cs) of radiostrontium and radiocaesium for various soil types, were derived from geometric means (GM) calculated from grouping soils by texture and organic matter content, and also using soil cofactors governing soil-radionuclide interaction.

TL;DR: Data is presented on the 137Cs distribution in tributaries, lake water, bottom sediments and the role of (137)Cs as a marker of the sedimentation processes and the run-off of 137Cs from the watershed to the lake is described with a simple compartment model.

TL;DR: This Issue of Journal of Environmental Radioactivity (JER) is fully devoted to speciation of radionuclides in the environment, and thereby emphasizing the importance of Radionuclide speciation in impact and risk assessments.

TL;DR: Some important naturally occurring alpha- and beta-radionuclides in drinking water samples collected in Italy were determined and the radiological quality evaluated, and can also serve as a comparison for the dose contribution from artificial radionuclide released to the environment as a result of human practices.

TL;DR: The total 239+240Pu activities and 240Pu/239Pu atom ratios in surface soil samples in the Kumtag Desert in western Gansu Province, China, and in a soil core sample in Lanzhou were investigated using a sector-field ICP-MS.

TL;DR: Back trajectory analysis is used to show that the amplitude of the increase can be quantitatively linked to the history of the air mass where the precipitation is occurring, and how back trajectory analysis, environmental gamma and rain data can be used to obtain estimations of relative radon emanation rates for locations far from the actual point of detection.

TL;DR: Measurements within and around the Ranger uranium mine in northern Australia show that parameters such as 226Ra activity concentration, soil grain size and soil porosity have a marked effect on 222Rn flux densities, indicating that factors such as duration, intensity and time between precipitation events can influence 222Rng exhalation densities considerably.