The spectroscopic characterization of plasma generated in meteorite samples during Laser-Induced Breakdown Spectroscopy (LIBS) shows the emission spectrum elements present and also allows one to rapidly identify elemental composition without any sample preparation with good accuracy compared some other methods. In addition, LIBS has advantages, such as multi-elemental response, micro–nano gram ...

Recovery of rare earth elements (REEs) has become an attractive process owing to the high costs and limited availabilities REEs. In addition, recovery REEs a necessity because their toxicity negative environmental impacts. Conventional processes for from waste streams include chemical precipitation, coagulation, flocculation, flotation, ion exchange, adsorption, electrochemical processes. These...

Phosphate rock has been considered as one of the most significant secondary rare-earth resource, and utilization rare earth elements (REEs) in phosphate attracted increasing attention. In this study, leaching kinetics REEs from a ore China was studied with variation temperature phosphoric acid concentration under conditions: ratio liquid to solid 12 mL/g, stirring speed 120 r/min, particle size...

Abstract The total content of rare earth elements (REEs) and the their oxalate-soluble fraction were studied in four soil profiles (Gleyic Umbrisols, Albic Gleyic Folic Retisols (Raptic), Dystric Retisol) Central Forest Nature Reserve. REE was normalized to a local standard (the Russian Platform clay), cerium europium anomalies quantified [8]. In addition initial redistribution REEs during form...

Under the context of reserve depletion, recovering rare earth elements (REEs) from secondary resources is essential which assists to strengthen circular economy. Contaminated biomass growing brownfield lands a potential material for REE recovery. However, prior extraction stage, polluted plants need be lessened manageable volume. In this study, contaminated gathered an abandoned mining area was...

The separation of Rare Earth Elements (REEs) is an important step in the valorization REE ore and aims at producing individual rare earth compounds for market. carried out industrially by solvent extraction (SX) using interconnected circuits consisting cascades mixer-settlers. design a circuit implies selection operating conditions number mixer-settlers required to achieve target degree purity ...

one of the most intensive occurrences of magmatism in iran was in the middle jurassic period. among the granitoid intrusions in this period as discrete bodies or complexes can be pointed to aligoodarz, alvand, astaneh, boroujerd, malayer, and chah-dozdan in the sanandaj-sirjan zone; shir-kuh and ayrakan in the central iran zone; shah-kuh, sorkh-kuh and kalateh-ahani in the lut block. these gran...

In the present study, bioaccumulation of REEs in Zea mays L. (corn plant) has been analyzed. The role of Rare Earth Element (REEs) in physiology and biochemistry of corn plant have been studied. Physiological characters like peroxidase (POD) and superoxide dismutase (SOD) activities, biochemical analysis of chlorophyll, carotenoids and phenol contents have also been carried out. The plant growt...

Rare earth elements (REEs) have been recently identified as emergent contaminants because of their numerous and increasing applications in technology. The impact REEs on downstream ecosystems, notably aquatic organisms, is particular concern, but has to date largely overlooked. purpose this study were generate toxicological information regarding these poorly studied Gadolinium Lanthanum determi...

As an emerging contaminant, rare earth elements (REEs) are becoming environmental concern, especially in Chinese cities. This study investigated the distribution of REEs river water and tap samples Guiyang, Southwest China. In all samples, concentrations total dissolved REE (∑REE) ranged from 15.1 to 53.3 ng·L–1, with heavy enriched than light elements. Most showed significant positive Gd anoma...