Results 131 to 140 of about 5,473 (299)

Development of photocatalysis‐membrane separation reactor systems for aqueous pollutant removal

PhotoMat, EarlyView., 2023
Abstract Background In our rapidly expanding society, the demand for clean water has steadily emerged as one of the most critical issues, promoting the development of numerous water treatment strategies. Aims Coupling photocatalysis and membrane separation technology provides an energy saving and environment‐friendly as well as sustainable method for ...
Junyang Zhang, Yingchun Miao, Yuning Huo, Hexing Li   +3 more
wiley   +1 more source

Hierarchically Engineered Transition Metal Electrode for Direct Lithium Extraction From Brine

Carbon Energy, EarlyView.
Carbon‐modified WO3 nanoparticles deliver lithium extraction from simulated brine with Li+ capacity of 3 mmol Li g−1h−1 and 43% recovery efficiency. Reduced graphene oxide enhances charge transport and interfacial stability, while reversible W redox validated by in‐situ spectroscopy, governs lithium intercalation dynamics and structural stability ...
Ankit Kumar Tripathi, Lixue Jiang, Thành Trần‐Phú, Denny Gunawan, Yihao Shan, Adhi Satriyatama, Liming Dai, Rose Amal, Rahman Daiyan   +8 more
wiley   +1 more source

(NH4)2[Tc2O2(S2O7)4]: An Unexpected Technetium(V)‐Sulfate From the Reaction of (NH4)(TcO4) With SO3

Chemistry – A European Journal, EarlyView.
The reaction of the radioactive pertechnetate (99TcO4)− with the oxidizer SO3 leads to blue crystals of (NH4)2[Tc2O2(S2O7)4]. The complex dimeric [Tc2O2(S2O7)4]2− anion exhibits the technetium in the oxidation state V, showing that reduction occurs during the reaction.
Stefan Sutorius, Julian Heinen, David van Gerven, Jörn Bruns, Erik Strub, Mathias S. Wickleder   +5 more
wiley   +1 more source

Towards Sustainable Processing of Chromite Resources: A Review of Methods for Magnesium and Platinum-Group Metal Extraction

Inorganics
This article provides a review of modern technologies for processing chromite ores and beneficiation wastes, with a focus on the recovery of magnesium and platinum-group metals (PGMs).
Rinat Abdulvaliyev, Yerkezhan Abikak, Nazym Akhmadiyeva, Sergey Gladyshev, Alfiyam Manapova, Asiya Kasymzhanova   +5 more
doaj   +1 more source

FIRST DISCOVERY OF PLATINUM GROUP MINERALS IN COSTA RICA

, 2009
We report on the presence of Platinum group minerals (PGM) discovered, for the first time, in Costa Rica. The PGM were found in small chromitite bodies of the Santa Elena ophiolite.Se informa por primera vez la presencia de minerales de platino en la ...
Campos Bejarano, Lolita
core  

State‐of‐the‐Art and Synthetic Challenges for Hydrosilane Production

Chemistry – A European Journal, EarlyView.
The synthesis of hydrosilanes is currently energy intensive and their recycling is not considered. However, these compounds are important in many industrial fields but also for the valorization of oxygenated waste, towards a circular economy. This review compares the available synthetic routes and highlights the remaining challenges for the production ...
Gabriel Durin, Albane Fontaine, Jean‐Claude Berthet, Thibault Cantat   +3 more
wiley   +1 more source

Geochemistry of rare, rare earth elements and platinum group elements in rocks of Shaman ultramafic massif (Eastern Transbaikalia)

Литосфера, 2016
The research on petrochemistry and geochemistry of rare, rare earth and platinum group elements in the rocks Shaman massif - the largest ultramafic protrusion body in eastern branch of the Baikal-Muya ophiolite belt, performed using a different of ...
F. P. Lesnov, A. I. Chernyshov, E. . E Pugacheva   +2 more
doaj   +2 more sources

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

Deep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza, Hendrik Grobler, Moshood Onifade, Manoj Khandelwal   +3 more
wiley   +1 more source

Proterozoic arc magmatism from the Padhar mafic-ultramafics in Betul Belt, Central India Tectonic Zone: Insight from petrography, bulk rock and in-situ trace element geochemistry

Geosystems and Geoenvironment
This study presents the first identification of an Alaskan-type intrusion within the late-Proterozoic Padhar mafic-ultramafic complex (PMUC), situated along the Central Indian Tectonic Zone (CITZ).
M. Lachhana Dora, Hassan M. Helmy, Rajkumar Meshram, Nathala K. Rao, Mohamad Shareef, Raghuram, Vivek P. Malviya, Tushar Meshram, Srinivas Rao Baswani, Mohammad Atif Raza, Kirtikumar Randive   +10 more
doaj   +1 more source

Uniaxial compressive strength prediction and ratio parameter optimization of titanium tailings composite backfill materials using intelligent hybrid models

Deep Underground Science and Engineering, EarlyView.
Based on the 90 datasets, ERT and four optimization algorithms were used to build four hybrid models to predict the UCS of the backfill body. The SMA‐ERT model was the most effective model, and it can reliably guide the design of the backfill ratio parameters. Abstract This study analyzed the feasibility of using titanium (Ti) tailings as a backfilling
Weijun Liu, Zida Liu, Zhixiang Liu
wiley   +1 more source