Accumulation and fractionation of rare earth elements in …
In this paper, atmospheric particulates including total suspended particulate (TSP) matter and particles with an equivalent aerodynamic diameter less than 10 μm (PM 10) were …
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Rare earth element components in atmospheric particulates in …
The Bayan Obo mine, located in Inner Mongolia, China, is the largest light rare earth body ever found in the world. The research for rare earth elements (REEs) enrichment in atmospheric particulates caused by mining and ore processing is fairly limited so …
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Atmospheric emissions of fine particle matter bound rare …
Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. However, a gap remains regarding the...
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A Review of Recent Research on Rare Earth Particulate …
This paper portraits the fabrication of composites with improved mechanical and metallurgical characterization by reinforcing rare earth particulate. Also, the study describes the …
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Effect of Particle Size Refinement on the Leaching Behavior …
Abstract. The effects of particle size, temperature, and leaching time on the leaching behavior of rare-earth elements were studied. The leaching efficiency of the rare earth reached 39.24% under leaching conditions of hydrochloric acid concentration of 8.00 mol/L, particle size 95% distributed below 1.5 μm, leaching time of 120 min, and temperature of 90 °C.
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Quantitative evaluation of anthropogenic sources and health …
Download Citation | On Jun 1, 2024, Wenkai Guan and others published Quantitative evaluation of anthropogenic sources and health risks of rare earth elements in airborne particulate matter | Find ...
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A Review of Recent Research on Rare Earth Particulate …
Abstract Rare earth particulates are known as the ''seed of technology.'' Due to this in the last few years, the research based on rare earth particulate composite materials and structures (REPCMS) is remarkably increased. In this paper, a review of published papers that are related to mechanical properties along with their ...
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Comparative studies on the concentration of rare earth …
Atmospheric particulate matter (APM) was collected at three sampling sites in Beijing, China, from February to June 1998. The concentrations of rare earth elements (REE) and cobalt (Co), zinc (Zn), copper (Cu), cadmium (Cd) and lead (Pb) in the APM were determined by inductively coupled plasma mass spectrometry (ICP-MS).
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Quantitative evaluation of anthropogenic sources and health …
Rare earth elements (REEs) have emerged as contaminants in airborne particulate matter (PM); however, their anthropogenic sources remain poorly quantified, and associated health risks are unknown. This study investigates the REE distribution across eight sizes of airborne PM during July and December …
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Atmospheric emissions of fine particle matter bound rare earth …
This study quantifies rare earth elements in fine particulate matter emitted from various industrial activities, thereby contributing to a more profound understanding of the environmental and ...
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Atmospheric emissions of fine particle matter bound …
Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. How-ever, a gap remains regarding the...
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Rare Earths: Atmospheric Signatures for Oil-Fired Power
The concentration pattern of rare earth elements on fine airborne particles (less than 2.5 micrometers in diameter) is distorted from the crustal abundance pattern in areas influenced by …
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Rare-Earth Elements and Heavy Metals in …
To enhance our fundamental understanding of atmospheric PM 10 characteristics, rare-earth elements (REEs) and heavy metals were evaluated along with their source apportionment using the positive matrix factorization …
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Recycling of rare earth particle by mini-hydrocyclones
Mini-hydrocyclones were applied to separate the fine rare earth particles from the suspensions. The effects of the flow rate, split ratio, and feed concentration on the total separation efficiency and grade separation efficiency were studied. ... The abrasive particles are difficult to separate because of the fine particle size of the rare ...
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Investigation into the purification and regeneration of rare earth
The particle size of rare earth compounds expands and roughens post-treatment. Ultimately, RECO 3 F is converted into CeLa 2 O 3 F 3 and LaOF following calcination at 1000 °C. As evident from the theoretical calculation presented in Fig. 23, the products generated through the current process ...
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Atmospheric emissions of fine particle matter bound rare …
Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. However, a gap remains …
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Effects of Ore Particle Size Distribution on Rare Earth …
This paper investigates the rare earth (RE) leaching process of weathered crust leached rare earth ores (WCE-DREOs) with different ore particle sizes. Ore particles were categorized into seven distinct size ranges: −0.106 mm, +0.106 mm to −0.15 mm, +0.15 mm to −0.25 mm, +0.25 mm to −0.85 mm and +0.85 mm. The study examined the correlation …
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Sources and geochemical behaviors of rare earth elements …
The processes of rock weathering and soil erosion, and hydrochemical characteristics are significantly affected by the climate in a basin. However, the sources of rare earth elements (REEs) in suspended particulate matter (SPM) under soil erosion, as well as the geochemical behaviors of REEs with changes in hydrochemical properties between seasons, …
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(PDF) Atmospheric emissions of fine particle matter bound …
Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. However, a gap remains …
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Rare earth elements unintentionally released from global …
Rare earth elements are harmful to human lung, liver and brain. Rare earth elements have a hormesis effect on organisms. Exposure to rare earth elements (REY) in the …
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Particulate rare earth element behavior in the North …
Abstract. Particulate concentrations of the 14 Rare Earth El-ements (PREE), yttrium, and 232-thorium were measured in 200 samples collected in the epipelagic (ca. 0–200m) and …
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Preparation of crystalline rare earth carbonates with large particle …
Crystalline rare-earth (RE) carbonates having large particle size were prepared from the lixivium of weathered crust elution-deposited rare-earth ores using the precipitation method with ammonium bicarbonate as the precipitant. Their chemical composition was studied using elemental and thermogravimetric analyses (TGA), and their structure and morphology …
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New insights into rare earth element (REE) particulate …
Cigarette smoking is a well-recognized cause of lung cancer and other diseases and is a major contributor to indoor air pollution in numerous settings worldwide. Most cigarette lighters use rare earth element (REE) mischmetal in their flints in order to aid ignition, and these lighters thus have pyrophoric properties. REE particulate emitted from these lighters presents a …
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BG
Abstract. Particulate concentrations of the 14 Rare Earth Elements (PREE), yttrium, and 232-thorium were measured in 200 samples collected in the epipelagic (ca. 0–200 m) and mesopelagic (ca. 200–1500 m) zones of the North Atlantic during the GEOVIDE cruise (May/June 2014, R/V Pourquoi Pas?, GEOTRACES GA01), providing the most detailed snapshot of the …
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