Results 181 to 190 of about 742,292 (243)
Some of the next articles are maybe not open access.

Sources, behaviour, and environmental and human health risks of high-technology rare earth elements as emerging contaminants.

Science of the Total Environment, 2018
Recent studies show that high-technology rare earth elements (REEs) of anthropogenic origin occur in the environment including in aquatic systems, suggesting REEs are contaminants of emerging concern. However, compared to organic contaminants, there is a
W. Gwenzi   +5 more
semanticscholar   +1 more source

Rare-Earth and Transuranic Elements

Physical Review, 1941
Verf. zeigt das starke Absinken der Energie und das Schrumpfen der räumlichen Ausdehnung der \(4f\)- bzw. \(5f\)-Eigenfunktion beim Überschreiten der ungefähren Kernladungszahl \(Z = 57\) bzw. \(Z = 92\). Dieses Vorkommnis bedeutet, daß von diesen Ordnungszahlen ab die \(4f\)- bzw. \(5f\)-Bahnen zu inneren Elektronenbahnen werden.
openaire   +1 more source

The Rare-Earth Elements

2023
In this section, the elemental forms of rare-earth elements are iron gray to silvery lustrous metals that are typically soft, malleable, ductile, and usually reactive, especially at elevated temperatures or when finely divided. rare-earth elements are examined in terms of physical and chemical properties. This makes them essential components of diverse
Mikail Aslan, Cengiz Bozada
openaire   +1 more source

Review of rare earth elements recovery from secondary resources for clean energy technologies: Grand opportunities to create wealth from waste

, 2020
Rare earth elements (REEs) are vital components of high-tech electrical and electronic based materials. In the global scenario, the deposits of natural rare earth elements (REEs) are limited except for countries such as China.
R. Jyothi   +5 more
semanticscholar   +1 more source

Recovery of rare earth elements from coal fly ash by integrated physical separation and acid leaching.

Chemosphere, 2020
Coal fly ash (CFA) is one of the most promising secondary sources of rare earth elements and yttrium (REY). This research first studied the modes of occurrence of REY in CFA collected from a China's power generation plant which utilizes a coal feedstock ...
Jinhe Pan   +5 more
semanticscholar   +1 more source

A single-step process to leach out rare earth elements from coal ash using organic carboxylic acids

, 2021
The ever increasing applications of rare earth elements and their limited primary resources has compelled researchers worldwide to find alternate methods of efficient leaching from various secondary resources, in particular from end of life products. The
Riya Banerjee   +4 more
semanticscholar   +1 more source

A critical review of bioleaching of rare earth elements: The mechanisms and effect of process parameters

, 2020
Rare earth elements (REEs) are important high-tech materials with widespread industrial applications and a high risk of supply disruption. Current physico-chemical methods for REE recovery are energy intensive, complex, and costly. Thus, it is crucial to
P. Rasoulnia, R. Barthen, A. Lakaniemi
semanticscholar   +1 more source

The Rare Earth Elements: Demand, Global Resources, and Challenges for Resourcing Future Generations

Natural Resources Research, 2018
The rare earth elements (REE) have attracted much attention in recent years, being viewed as critical metals because of China’s domination of their supply chain. This is despite the fact that REE enrichments are known to exist in a wide range of settings,
K. Goodenough, F. Wall, David Merriman
semanticscholar   +1 more source

Selective extraction of thorium from uranium and rare earth elements using sulfonated covalent organic framework and its membrane derivate

, 2020
Thorium, as a nuclear-power replacement for the uranium-based nuclear reactors and an effective avenue to produce uranium source, has become a key element for the increasing energy demand.
Xiao-hong Xiong   +6 more
semanticscholar   +1 more source

Extraction and Separation of Rare Earth Elements by Adsorption Approaches: Current Status and Future Trends

Separation and Purification Reviews, 2020
Strategic elements, such as rare earth elements, play a critical part in industry, especially in the production of high-tech materials. Major global industries developed a strong dependence on rare earth materials.
M. Asadollahzadeh   +2 more
semanticscholar   +1 more source

Home - About - Disclaimer - Privacy