Results 31 to 40 of about 363,105 (311)
Optimization of groundwater contamination control in decommissioned acid in-situ leach uranium mines
Nuclear Engineering and TechnologyUpon decommissioned acid in-situ leaching (ISL) uranium mining sites, contaminants (e.g. U(VI), SO42−) tend to migrate downstream under natural groundwater flow, posing significant risks to groundwater quality.
Genmao Zhou +8 more
doaj +1 more source
MetalsA novel acid-free oxygen pressure leaching for the extraction of zinc from hemimorphite was proposed in this study. Green vitriol (FeSO4·7H2O), as one of the important industrial by-products, was used as the leaching reagent to separate zinc from silicon
Tong Wang +6 more
doaj +1 more source
工程科学学报, 2023 Manganese is one of the important strategic resources in China, and there is a saying that “no manganese, no steel”. In 2020, China’s output of electrolytic metal manganese was 1501300 tons, accounting for 96.5% of the global output.
Jun-jie ZHAO +5 more
doaj +1 more source
The fate of nitrogen from crop residues of broccoli, leek and sugar beet [PDF]
, 2010 Environmental concern has lead to legislation on fertilization to reduce nutrient losses to the environment. Reducing N input may be inadequate for crops that have a high N content in their residues. Reducing N input will negatively affect yield, but the
Berge, H.F.M., ten +2 more
core +3 more sources
Recent Progress in Electric Furnace Titanium Slag Processing and Utilization: A Review
Crystals, 2022 Titanium slags produced through ilmenite electric furnace smelting contain 60–80%TiO2, a vital titanium resource in the titanium industry. The processing and utilization of titanium slag is faced with many challenges, such as complex mineral structures ...
Jianfa Jing +5 more
doaj +1 more source
Oxygen application to chloride leaching of complex sulfide ores [PDF]
, 1987 The study investigates leaching of complex sulfide ores with simultaneous regeneration of the leaching solution and removal of dissolved iron to balance the iron concentration in the leaching process.
Chou, Kuo Tung
core
Patterns of dissolved organic carbon and nitrogen fluxes in deciduous and coniferous forests under historic high nitrogen deposition [PDF]
, 2009 Numerous recent studies have indicated that dissolved organic carbon (DOC) and nitrogen (DON) play an important role in C and N cycling in natural ecosystems, and have shown that N deposition alters the concentrations and fluxes of dissolved organic ...
De Neve, Stefaan +6 more
core +2 more sources
Advanced Engineering Materials, EarlyView.Powder metal processing provides scalable advantages in nanoporous (np) metal development. Mechanical alloying is used to produce unique precursors for hybrid nanopore formation by oxide reduction and dealloying. As demonstrated in np Ag, this approach improves process efficiency while promoting smaller ligaments and larger pores, both of which are ...
Mark A. Atwater, Oliver A. Fowler
wiley +1 more source
Research progress of non-cyanide gold leaching in gold mines
工程科学学报, 2021 With the exhaustion of easy-to-treat gold ore resources, gold ores containing arsenic, carbon, high sulfur, and ultrafine particles have become the focus of gold mining.
Ke-bo PENG +7 more
doaj +1 more source
Heap Leaching Simulation [PDF]
IFAC Proceedings Volumes, 1998 Abstract Ore leaching techniques combined with solution treatment procedures offer exceptional conditions to produce high purity metal from very low-grade ore sources. Essential percentage of the world copper production is based on the heap and dump leaching techniques.
Jämsä-Jounela, Sirkka-Liisa +1 more
openaire +2 more sources