The determination of rare earth elements (REEs) in airborne particulate matter (APM) was conducted, and the distribution pattern of atmospheric REEs was evaluated in this study. The APM was collected in the center of Tokyo, Japan, where serious air pollution is always of concern. A cellulose acetate membrane filter was used to collect the APM because Ba and REEs contamination is lower than that...

The uptake of REEs was investigated using nano-zero valent iron (nZVI) and alumina-supported nZVI (AlnZVI). The results indicated fast uptake, with saturation approached within 10 min of contact between solutions and solids. Upon using nZVI, the uptake of REEs seemed to be quantitative over the studied range of concentration; 1.0–100.0 mg L . When Al-nZVI was used, complete removal was achieved...

Rare earth elements (REEs) extraction from wastes and/or by-products is alternative possibility of their winning. The occurrence ofREEs, namely 50.1 ppm La, 100.1 Ce and 44.3 Nd was confirmed in solid fly ash samples the coal fired heatingplant (TEKO, Inc. Košice, eastern Slovakia). submitted contribution presents laboratory results REEs leaching ashusing 3M HCl, HNO3, H2SO4 H3PO4 at 80°C durin...

Definitions and characteristics The rare earth elements (REE) (sometimes referred to as the rare earth metals) are a group of 17 chemically similar metallic elements, including the 15 lanthanides, scandium and yttrium. The lanthanides are elements spanning atomic numbers 57 (lanthanum, La) to 71 (lutetium, Lu) (Table 1). The lanthanides all occur in nature, although promethium, the rarest, only...

biglar permo-triassic bauxite deposit is located in ~15 km northwest of abgarm, southwest of ghazvin province, west of central iran. it consists of 8 stratiform and discontinuous bauxite lenses lying along the contact of ruteh (permian) and elika (triassic) carbonate formations. petrographically, the bauxite ores exhibit collomorphic-fluidal, pseudo-breccia, pseudo-porphyritic, panidio-morphic-...

Development of the effective technology for recovery critical rare-earth elements (REEs) from end-of-life permanent magnets is one important technological challenges. In this study, chemical and electrochemical leaching NdCeFeB was investigated in 0.5 mol/L sulfuric acid containing varying concentration oxalic acid. The influence H2C2O4 on efficiency morphological properties surface, as well co...

Rare earth elements (REEs) are widely used in high-tech industries and important basic raw materials. Bastnaesite is one of the most minerals rare extraction industry, efficient development it key guarantee for safe supply In this study, a novel method dissolving bastnaesite using carboxyl-functionalized ionic liquid ([Hbet][Tf2N]) proposed. This innovative provides collaborative model with dis...

Rare earth minerals (REMs) contain rare elements (REEs) that are important in modern technologies due to their unique magnetic, phosphorescent, and catalytic properties. However, REMs not only non-renewable resources but also non-uniformly distributed on the Earth’s crust, so processing of REE-bearing secondary via recycling is one potential route ensure long-term sustainability REE supply. Flo...