Mechanical and physical removing of soil and plants as agricultural mitigation techniques

Jouve, A; Schulte, E.; Bon, P.; Cardot, A.L.

doi:10.1016/0048-9697(93)90378-j

Cited by 16 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In parallel, experimental studies have increased the array of potential measures. Nowadays, a number of applicable measures exist that are recognised as effective and technically, as well as economically, feasible (Sandalls, 1990;Alexakhin, 1993;Jouve et al, 1993;Konoplev et al, 1993;Nisbet et al, 1993;Segal, 1993;Willrodt, 1993;IAEA, 1994;SCKCEN, 2002). However, countermeasures do not need only to be scientifically sound and technically and economically feasible, but they also need to be socially and psychologically acceptable for the stakeholders concerned.…”

Section: Introductionmentioning

confidence: 99%

Attitude of a group of Belgian stakeholders towards proposed agricultural countermeasures after a radioactive contamination: synthesis of the discussions within the Belgian EC-FARMING group

Vandecasteele

Hardeman

Pauwels³

et al. 2005

Journal of Environmental Radioactivity

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Attitude of a group of Belgian stakeholders towards proposed agricultural countermeasures after a radioactive contamination: synthesis of the discussions within the Belgian EC-FARMING group

Vandecasteele

Hardeman

Pauwels³

et al. 2005

Journal of Environmental Radioactivity

View full text Add to dashboard Cite

“…Initial cleanup priorities after an incident would likely focus on populated areas, leaving the forested areas to pass for one or more seasons, where the overhead canopy materials (where initial deposition of radionuclides would occur) would fall to the forest floor. The nuclear power plant (NPP) accidents in Chernobyl and Fukushima showed that the contaminated forests were not remediated on a large scale due to lack of fast and cost-effective mitigation methods (Hashimoto et al 2012;Jouve et al 1993;Linkov, Morel, and Schell 1997). Forest decontamination is difficult because modification of forest via decontamination (e.g., topsoil removal) may disturb forest ecosystems via erosion, sedimentation, disruption of habitat, and loss of nutrients (Jouve et al 1993).…”

Section: Introductionmentioning

confidence: 99%

Cesium emissions from laboratory fires

Hao

Baker

Lincoln

et al. 2018

Journal of the Air & Waste Management Association

View full text Add to dashboard Cite

If a radiological incident such as a nuclear power plant accident, a radiological dispersal device, or detonation of an improvised nuclear device occurs, significant areas may be contaminated. Initial cleanup priorities would likely focus on populated areas, leaving the forested areas to pass several seasons where the overhead canopy materials would fall to the forest floor. In the event of a wildfire in a radionuclide-contaminated forest, some radionuclides would be emitted in the air while the rest would remain in the ash. This paper reports on a laboratory simulation study that examines the partitioning of cesium-133 (a nonradioactive isotope of cesium) between airborne particulate matter and residual nonentrained ash when pine needles and peat are doped with cesium. Only 1-2.5% of the doped cesium in pine needles was emitted as particulate matter, and most of the cesium was concentrated in the particulate fraction greater than 10 µm in aerodynamic diameter. For peat fires, virtually all of the cesium remained in the ash. The results from this study will be used for modeling efforts to assess potential exposure risks to firefighters and the surrounding public.Implications: There is a potential for emissions of radionuclides such as cesium-137 from a wildfire over a radionuclide-contaminated forest. This paper reports on a laboratory simulation study of a wildfire with two types of biomass doped with nonradioactive cesium. This simulation suggests that only 1-2.5% of the cesium in the biomass will be emitted from the wildfire, while the rest will reside in the residual ash. In this study, pine needles were the only contributor to the air emissions of cesium; duff was not a source of cesium emissions. In this study, cesium emitted from the simulated wildfire was concentrated in the particle sizes larger than 10 µm.

show abstract

“…(ICRP, 1991;Willrodt, 1993;Segal, 1993;Vandecasteele et al, 1995). (Baes et aU 1986;Sandalls, 1990;Kirchmann, 1990;Jouvre et al 1993;Alexakhin, 1993;Nisbet et al, 1993;Prister et a/, 1993 (Bengtsson, 1989(Bengtsson, , 1993(Bengtsson, , 1994 Voigt, 1993Voigt, 1993Howard et al, 1995Voigt, 1993Howard et al, 1995Voigt, 1993Voigt, 1993 Ζεόλιθοι Μικρή -Μέτρια Μεγάλες ποσότητες υλικού Hansen, 1995 (<38%) a/, 1994) και πιθανώς το sodium ή calcium alginate για το στρόντιο (Carr et aU 1968;Kostial et al 1987).…”

Section: αντίμετρα για την αντιμετώπιση της ραδιενεργού μόλυνσης του περιβάλλοντοςunclassified

Μελετη Της Δεσμευσης Ραδιενεργων Ρυπων Απο Υποστυλωμενα Φυλλομορφα Αργιλοπυριτικα Υλικα

Καραμανησ¹

View full text Add to dashboard Cite

The aim of the research presented in this thesis was the study of the selective sorption of radioactive cesium and strontium in Pillared Layered Clays (PILCs). Two reference samples, coded ATFflNA and AZA, were initially used in experiments both in vitro and in vivo. An improved pillared clay, coded FRAZA, was constructed, characterised by several methods (XRD, XRF, PIGE, N 2 adsorption-desorption, radiotracers' exchange isotherms) and employed in exchange experiments. The reference samples and the material FRAZA differed in both the nm and μηι scales as a result of the different organisation and structural evolution of the clay layers. Furthermore, four different methods, defined as method A, Β etc, were tested for restoring the cation exchange capacity (CEC) of the thus prepared PILCs. The most effective proved method D which involved exposing the material to ammonia fumes followed by soaking in a sodium alkaline solution.Samples of ATHINA-A and AZA-A were used in the in vitro sorption experiments under static conditions. Kinetic experiments were analysed through the laws of isotopie exchange and film diffusion as the rate-determining step. Sorption rates of the order of hours were observed. The application of a phenomenological model developed for the interpretation of the results obtained in these experiments (NPL model), determined the selectivity coefficients of Cs or Sr over competitive cations of Na, Κ, Η and Ca. The observed PILCs' selectivity was interpreted through the electrostatic interaction of the cations and the negative charged clay layers. Furthermore, the influence of pH, solution volume and temperature in radiostrontium sorption was studied while, in experiments with cation concentrations simulating rumen liquid, the NPL model predicted the observed strontium sorption percentages. Comparison of PILCs with cyanoferrates (AFCF) revealed the reasons of AFCF effectiveness in cesium sorption and PILC superiority in strontium sorption. An unsuccessful in vivo experiment involving PILC administration to ruminants was attributed mainly to the limited time of contact between the material and strontium in the digestive tract of the animals and the insufficient material CEC restoration (method A).The materials AZA-D and FRAZA-D were used in cation exchange experiments. Cesium or strontium uptake was faster in FRAZA-D than AZA-D under both static and dynamic experimental conditions. This result was attributed to the different microscopic and macroscopic structure that materials possessed. Moreover, the separation factors Sr-Na and Sr-Ca were determined for FRAZA-D with values greater than 40 and 2 respectively. The selectivity of FRAZA-D for strontium sorption over several monovalent and divalent competitive cations was further confirmed in experiments with rumen liquid. The results derived from FRAZA-D administration in ruminants for strontium and cesium sorption were positive and promising for further investigation and research.

show abstract

Mechanical and physical removing of soil and plants as agricultural mitigation techniques

Cited by 16 publications

References 4 publications

Attitude of a group of Belgian stakeholders towards proposed agricultural countermeasures after a radioactive contamination: synthesis of the discussions within the Belgian EC-FARMING group

Attitude of a group of Belgian stakeholders towards proposed agricultural countermeasures after a radioactive contamination: synthesis of the discussions within the Belgian EC-FARMING group

Cesium emissions from laboratory fires

Μελετη Της Δεσμευσης Ραδιενεργων Ρυπων Απο Υποστυλωμενα Φυλλομορφα Αργιλοπυριτικα Υλικα

Contact Info

Product

Resources

About