Results 31 to 40 of about 215,200 (314)
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
doaj +1 more source
Leach Rate Characterization of Solid Radioactive Waste Forms [PDF]
, 1979 Leach rates for a number of proposed radioactive waste forms have been measured. A neutron activation analysis technique has been used exclusively for these measurements. Leach rates as low as 10-9g/cm2d were easily determined. Problems associated with surface area determination, sample preparation and data interpretation are discussed.
Flynn, K.F. +3 more
openaire +1 more source
Natural and simulated aging of historical glasses [PDF]
, 2017 We thoroughly studied coloured glass tesserae of historical glass windows of the Santi Giovanni e Paolo Church in Venice by means of ESEM and XPS techniques in order to evaluate the weathering mechanisms of the glass surfaces.
Bertoncello, Renzo, Elena, Rebollo
core +1 more source
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
doaj +1 more source
Impurity leaching rates of 1000 liter growth tanks [PDF]
, 1999 This memo reports on the analysis of some recent measurements of solution impurity levels in the three KDP and one DKDP Pilot Production 1000 liter growth tanks (Tanks B, C, D, & F). Solution samples were taken on a weekly basis during recent crystal growth runs in each tank and were analyzed by inductively coupled plasma emission spectroscopy (ICP-ES).
Burnham, A +3 more
openaire +2 more sources
Rotating maize reduces the risk and rate of nitrate leaching
Environmental Research Letters, 2021 There is a strong link between nitrate (NO _3 -N) leaching from fertilized annual crops and the rate of nitrogen (N) fertilizer input. However, this leaching-fertilizer relationship is poorly understood and the degree to which soil type, weather, and ...
Heather Pasley +6 more
doaj +1 more source
Different Treatments of Zinc Oxide Ore in Caustic Leaching Process
Kuangchan zonghe liyong, 2022 Resource recycling of Zinc oxide ore is an important concern in zinc smelting industry at present. In this study, comparison of ultrasonic-assisted and traditional treatment of zinc oxide ore with caustic leaching process was investigated.
Jie Yuan +3 more
doaj +1 more source
A sensitivity analysis of the prediction of the nitrogen fertilizer requirement of cauliflower crops using the HRI WELL_N computer model [PDF]
, 2001 HRI WELL_N is an easy to use computer model, which has been used by farmers and growers since 1994 to predict crop nitrogen (N) requirements for a wide range of agricultural and horticultural crops.
Draycott, A. Philip (Arthur Philip) +4 more
core +1 more source
Frontiers in ChemistryThe immobilization of high-level nuclear waste (HLW) in glass waste matrices provides the key safety function of slowing down radionuclide emissions from an underground disposal site.
Mohammad Hosseinpour Khanmiri +5 more
doaj +1 more source
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
doaj +1 more source