Results 21 to 30 of about 133,969 (266)

A Sustainable Process for the Recovery of Valuable Metals from Spent Lithium Ion Batteries by Deep Eutectic Solvents Leaching

Materials Proceedings, 2022
The feasibility of using low-environmental-impact leaching media to recover valuable metals from lithium ion batteries (LIBs) has been evaluated. Several deep eutectic solvents (DES) were tested as leaching agents in the presence of different type of ...
Lourdes Yurramendi, Jokin Hidalgo, Amal Siriwardana   +2 more
doaj   +1 more source

Leaching behavior of germanium from germanium-rich lignite: A further comprehension of its occurrence state

Fuel Processing Technology
Germanium, a critical metal used in many strategy fields, is widely acknowledged as organic affinity. Germanium is main occurred in the humus of lignite, but its exact occurrence state remains unclear. In this work, various methods were employed to leach
Zhiyuan Zhang, Yanyan Xu, Guixia Fan, Yingrui Jin, Daoguang Teng, Guosheng Li, Peng Li, Yijun Cao   +7 more
doaj   +1 more source

Alkali-Resistant Ion-Imprinted Chitosan–Mesoporous Silica Composite for Efficient and Selective Gallium Separation

Separations
Efficient and selective separation of gallium (Ga(III)) from alkaline industrial waste streams remains a significant challenge due to the coexistence of chemically similar ions such as Al(III) and V(V). In this study, a novel ion-imprinted chitosan-based
Zhifang Lv, Shiqiao Yang, Jiangyan Wu, Guixia Fan, Guosheng Li, Yijun Cao, Peng Li, Daoguang Teng   +7 more
doaj   +1 more source

A Fluid Inclusion and Critical/Rare Metal Study of Epithermal Quartz-Stibnite Veins Associated with the Gerakario Porphyry Deposit, Northern Greece

Applied Sciences, 2022
The Gerakario Cu-Au porphyry deposit in the Kilkis ore district, northern Greece, contains epithermal quartz-stibnite veins on the eastern side of the deposit, which crosscut a two-mica gneiss. Metallic mineralization in these veins consists of stibnite +
Christos L. Stergiou, Vasilios Melfos, Panagiotis Voudouris, Lambrini Papadopoulou, Paul G. Spry, Irena Peytcheva, Dimitrina Dimitrova, Elitsa Stefanova   +7 more
doaj   +1 more source

Critical Metallicities for Second‐Generation Stars [PDF]

AIP Conference Proceedings, 2008
The first massive stars may influence the formation of second-generation stars, in part by their metal enrichment of the surrounding gas. We investigate the "critical metallicity", defined as the the value, Z_crit, at which primordial gas cools more efficiently by fine-structure lines of O I (63.18 microns, Si II 34.8 microns, Fe II (25.99 and 35.35 ...
openaire   +2 more sources

Acid-Assisted Separation of Cathodic Material from Spent Electric Vehicle Batteries for Recycling

Metals, 2023
The recycling of lithium-ion batteries presents challenges due to the complex composition of waste streams generated by current processes. Achieving higher purity levels, particularly in the reclamation of aluminium metal and transition metal black mass,
Anton Zorin, Tengfei Song, Dominika Gastol, Emma Kendrick   +3 more
doaj   +1 more source

Cell wall target fragment discovery using a low‐cost, minimal fragment library

FEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan, Mathew Stanley, Olawale Raimi, Andrew T. Ferenbach, Helge C Dorfmueller, Daan M. F. van Aalten   +5 more
wiley   +1 more source

Precipitation–Flotation Process for Molybdenum and Uranium Separation from Wastewater

Metals
The mining of molybdenum and uranium ores inevitably results in the generation of large volumes of wastewater containing low concentrations of metals, which poses significant threats to the environment. This study presents a novel precipitation–flotation
Yanfang Huang, Sa Yue, Aohua Li, Hu Sun, Yizhuang Wang, Qunzhen Bu, Bingbing Liu, Guihong Han   +7 more
doaj   +1 more source

Challenging the Need for Deep Seabed Mining From the Perspective of Metal Demand, Biodiversity, Ecosystems Services, and Benefit Sharing

Frontiers in Marine Science, 2021
The extraction of minerals from the seabed of the deep oceans is of increasing interest to investors, mining companies and some coastal states. To date, no commercial-scale deep seabed mining has taken place but there is considerable pressure for ...
K. A. Miller, K. Brigden, D. Santillo, D. Currie, P. Johnston, K. F. Thompson, K. F. Thompson   +6 more
doaj   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source