Results 31 to 40 of about 5,568,677 (301)
Temperature Effect on Plutonium Leach Rate of Nuclear Waste Glass [PDF]
Journal of Nuclear Science and Technology, 1989 The two kinds of nuclear waste glass with similar composition, a 238Pu-doped and non-radioactive waste glass, were leached under the ISO-test conditions at temperature between 23 and 90°C. An activation energy of 22±10 kJ/mole was obtained from the initial leach rates of Pu, which was much lower than the 78±9 kJ/mole obtained from those of Si, Na, Sr ...
BANBA, Tsunetaka +2 more
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Catch crop strategy and nitrate leaching following grazed grass-clover [PDF]
, 2007 Cultivation of grassland presents a high risk of nitrate leaching. This study aimed to determine if leaching could be reduced by growing spring barley (Hordeum vulgare L.) as a green crop for silage with undersown Italian ryegrass (Lolium multiflorum Lam.)
Hansen, E.M., Eriksen, J., Vinther, F.P.
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Nitrogen leaching in small agricultural catchments [PDF]
, 2004 Nitrogen (N) leaching from arable land to the aquatic environment is considered a serious problem. Small agricultural monitoring catchments in Sweden were used for the application and testing of model-based methods for quantification of N leaching from ...
Kyllmar, Katarina
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Leach Rates of Lead-Iron Phosphate Glass Waste Forms [PDF]
Journal of Nuclear Science and Technology, 1988 Lead-iron phosphate glasses loaded with simulated high-level nuclear wastes at temperatures between 900 and 1,100°C were studied on their soaking behavior in distilled water by means of leachate solution analysis. The obtained results showed that the leach rates of the glass waste forms were at least 10 to 100 times lower than that of the currently ...
YANAGI, Tadashi +2 more
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Kuangchan zonghe liyong, 2022 In order to improve the comprehensive utilization rate of V2O5 form vanadium titanomagnetite concentrates, the direct leaching and the roasting-leaching tests were carried out using titanium white waste acid byorthogonal experiment method. The results of
Enhui Wu +6 more
doaj +1 more source
Evaluation of the impact of various agricultural practices on nitrate leaching under the root zone of potato and sugar beet using the STICS soil–crop model [PDF]
, 2008 The quaternary aquifer of Vitoria-Gasteiz (Basque Country, Northern Spain) is characterised by a shallow water table mainly fed by drainage water, and thus constitutes a vulnerable zone in regards to nitrate pollution. Field studies were performed with a
Antigüedad, Iñaki +9 more
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Experimental Study on Cyanidation Leaching of a Low-grade Gold Mine in Guangxi
Kuangchan zonghe liyong, 2023 Gold content of a low-grade gold ore in Guangxi is 1.29 g/t, the gangue minerals are mainly quartz, and the content of non-ferrous metals such as copper, lead, zinc and other harmful elements arsenic is extremely low.
Linsong Yuan +5 more
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Leaching of vanadium, potassium, and iron from spent catalyst of the manufacture of sulfuric acid
Journal of Materials Research and Technology, 2021 The sulfuric acid industry produces large volumes of spent catalyst containing vanadium. To develop an efficient method for vanadium recovery, hydrogen peroxide was used to oxidize sulfur in the spent catalyst, forming sulfuric acid, which, in turn ...
Liushun Wu +4 more
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Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навукStudies have been carried out to determine the main parameters characterizing the quality of cement compounds: 137Cs leaching rate and mechanical strength.
T. G. Leontieva +3 more
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Yankuang ceshi, 2018 BACKGROUND The accurate determination of ionic phase rare earths in ion-adsorption rare earths is of great significance for the evaluation of rare earth ore bodies. Ionic phase rare earths are adsorbed on clay minerals in the form of hydroxyl or hydrated
ZHANG Lei +5 more
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