Disposability of the UK's Intermediate Level Wastes

2008 ◽  
Vol 1107 ◽  
Author(s):  
Paul K. Abraitis ◽  
Glyn Davies
Keyword(s):  
Chemical Properties ◽  
Intermediate Level ◽  
System A ◽  
Waste Container ◽  
Heterogeneous Nature ◽  
Engineered Barriers ◽  
Physical And Chemical ◽  
Reactive Properties ◽  
And Chemical Properties

AbstractThe UK's intermediate level waste (ILW) comprises a range of waste types, which vary widely in terms of physical and chemical properties, radionuclide content (including fissile) and half-life. ILW needs to be conditioned in such a way as to provide confidence that a future disposal facility for such wastes will be able to meet or exceed the basic long-term safety and environmental protection standards. The reactive properties and heterogeneous nature of certain ILW can present waste immobilisation challenges and, depending on the waste conditioning process that is adopted, may ultimately preclude the production of truly passive wasteforms. Of considerable interest is the extent of long-term containment likely to be afforded by the waste container, the wasteform and any engineered barriers within the disposal system. A regulatory view of the current uncertainties is provided and areas where further understanding would be beneficial are identified.

scholarly journals Tillage and no-tillage effects on physical and chemical properties of an Argiaquoll soil under long-term crop rotation in Buenos Aires, Argentina

2020 ◽  
Vol 8 (2) ◽  
pp. 185-194 ◽  
Author(s):  
Ana Clara Sokolowski ◽  
Barbara Prack McCormick ◽  
Javier De Grazia ◽  
José E. Wolski ◽  
Hernán A. Rodríguez ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Buenos Aires ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
No Tillage ◽  
Physical And Chemical ◽  
And Chemical Properties

Sugarcane Biochar for Agricultural Use Produced in Different Conditions of Pyrolysis

2019 ◽  
pp. 1-8
Author(s):  
Juliany Barbosa de Pinho ◽  
Aloisio Bianchini ◽  
Pedro Silvério Xavier Pereira ◽  
Letycia Cunha Nunes ◽  
Rodrigo Fernandes Daros ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Exchange Capacity ◽  
Raw Material ◽  
Physical And Chemical Properties ◽  
Oxidizing Atmosphere ◽  
Different Temperatures ◽  
Agricultural Use ◽  
Physical And Chemical ◽  
And Chemical Properties

From the pyrolysis process, biochar is a carbon rich and recalcitrant organic material with potential for long term carbon sequestration because of its aromatic structure. However, the physical and chemical properties of the biochar vary due to the diversity of raw material and the conditions of production. The present study aimed to evaluate the biochar from the sugarcane bagasse at different temperatures and under two conditions of pyrolysis. The biochar was produced at two final temperatures 200°C (1 hour); 250°C (1h) and 250°C (2h), with pyrolysis of an oxidizing and non-oxidizing atmosphere for both. PH, cation exchange capacity (CTC), carbon content (C), Nitrogen (N), hydrogen (H), H:C, C:N and ash ratios were evaluated. The contents of C, H, N and the atomic ratios H:C and C:N were higher in Biochar produced in a non-oxidizing atmosphere (BNO). However, the content of ash, pH and CTC were higher in Biochar produced in oxidizing atmospheres (BO). One can conclude the direct influence of the pyrolysis condition.

scholarly journals THE EFFECT OF LONG-TERM INTAKE OF ATORVASTATIN AND 1-CHOLECALCIFEROL ON THE PHYSICAL AND CHEMICAL PROPERTIES OF LIPOPROTEIN BLOOD COMPLEXES OF LABORATORY RATS

2017 ◽  
pp. 49-52
Author(s):  
S. S. Osuchuk ◽  
O. S. Yakovleva
Keyword(s):  
Chemical Properties ◽  
Intragastric Administration ◽  
Physical And Chemical Properties ◽  
Laboratory Rats ◽  
Combined Application ◽  
Term Administration ◽  
Physical And Chemical ◽  
Positive Effect ◽  
And Chemical Properties

Object: to study the physical and chemical properties of the lipoprotein complexes of rats` blood in the long-term administration of statins and vitamin D. Material and methods. The experiment was performed on 4 experimental groups of rats for 90 days: 1 - intact; 2 - placebo; 3 - intragastric administration of atorvastatin; 4 - intragastric administration of atorvastatin with α-calcidol. The lipoprotein blood complexes were isolated by the method of differential ultracentrifugation. The microflow and microviscosity of the lipoprotein complexes were determined using pyrene. Results. The placebo group revealed an increase of the micropolarity of the total lipid pool of VLDL and a decrease of the microviscosity of the annulary pool of LDL and HDL. The administration of atorvastatin reduces the microviscosity of HDL. The combined application of atorvastatin and α-calcidol reduces the microviscosity of HDL. Conclusion. We have drawn a conclusion about the complex effect of stress, atorvastatin, and α-calcidol on the physical and chemical properties of the lipoprotein blood complexes and a conclusion about the positive effect of atorvastatin and α-calcidol on the microviscosity of HDL.

Technology and organization of storage of combine harvesters

2021 ◽  
pp. 9-17
Author(s):  
N. M. Morozova
Keyword(s):  
Chemical Properties ◽  
Long Term Storage ◽  
Scientific Task ◽  
Atmospheric Factors ◽  
Combine Harvesters ◽  
Physical And Chemical ◽  
Technical And Organizational Measures ◽  
Term Storage ◽  
And Chemical Properties

During long-term storage, climatic and atmospheric factors affect the agricultural machine, which cause changes in the physical and chemical properties of structural materials, technical fluids, lubricants. Therefore, the development of technical and organizational measures related to improving the storage efficiency of combine harvesters is an urgent scientific task that the leading scientific institutes of the country are engaged in.

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