Results 131 to 140 of about 5,495 (300)

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

(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

Experiments and Models Bearing on the Role of Chromite as a Collector of Platinum Group Minerals by Local Reduction [PDF]

, 2006
Chromite is widely recognized to act as a collector for platinum group elements (PGE), which tend to be observed as discrete grains of plat-inum group minerals included within magmatic chromite grains.
James M. Brenan, Andw F. Mcdonough, James E. Mungall, Craig S. Finnigan   +3 more
core  

Catalyst‐Free Selective Reduction of Nitrogen Dioxide to Nitric Oxide

Chemistry – A European Journal, EarlyView.
Common main group reductants selectively convert nitrogen dioxide to nitric oxide in a catalyst‐free manner. Computational studies suggest divergent reaction pathways depending on the reductant employed. Where boranes and silanes proceed via a two‐electron process, and hydrogen surrogates undergo stepwise one‐electron processes.
Awais W. Seyyad, Agamemnon E. Crumpton, Reece Lister‐Roberts, Meera Mehta   +3 more
wiley   +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

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

Micronutrient Status in Children Suffering From Anorexia Nervosa: A Cohort of 349 Patients in a Referral Center for Eating Disorders

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Anorexia nervosa (AN) is a serious illness in which more than half of all deaths are due to malnutrition. Critically low energy and protein intake are known causes of massive weight loss, whereas micronutrient deficiencies due to a low‐calorie food pattern remain poorly characterized in children with AN. Micronutrient deficiencies in
Zenaida Iordan, Diane Morfin, Marion Bernetiere, Marie Fauchet, Noël Peretti, Bérénice Segrestin, Pierre Poinsot   +6 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

Mineralogy and geochemistry of heavy concentrate from the Malaya Nesterovka gold placer (Primorsky krai): electron microprobe data

Известия высших учебных заведений: Геология и разведка
Background. The Fadeevsky ore-placer cluster (Primorsky Krai) is a promising gold-bearing area; however, the bedrock sources of its numerous placers remain a subject of debate.
E. I. Medvedev, V. V. Ivin
doaj   +1 more source

Z‐Scheme BiOCl‐Based Photocatalysts: Recent Advances in Designing, Structural Engineering, Formation Mechanisms, and High Performance Photocatalytic Environmental Remediation

EcoEnergy, EarlyView.
This review deals with the recent advancements in design and engineering of BiOCl‐based Z‐scheme photocatalysts with emphasis on tailoring of structural, optoelectronic properties and heterojunction assembly for environmental applications including photodegradation of industrial organic waste, pharmaceuticals, pesticides, herbicides, toxic heavy metals,
Sakshi Sharma, Neha Kaushal, Victor Ezebuiro, Monika Sindhu, Lovepreet Singh, Yugesh Singh Thakur, Hendrik C. Swart, Jai Prakash   +7 more
wiley   +1 more source