Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. However, a gap remains …
→ WhatsApp: +86 18221755073
Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. However, a gap remains …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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, …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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).
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. However, a gap remains regarding the...
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
Unintentional releases of rare earth elements (REEs), emerging environmental pollutants, from global industries contribute to atmospheric pollution. How-ever, a gap remains regarding the...
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
This paper portraits the fabrication of composites with improved mechanical and metallurgical characterization by reinforcing rare earth particulate. Also, the study describes the …
→ WhatsApp: +86 18221755073
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 …
→ WhatsApp: +86 18221755073
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 ...
→ WhatsApp: +86 18221755073
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.
→ WhatsApp: +86 18221755073
كسارة الحجارة - تباع من قبل الموردين المعتمدين، مثل كسارة الفك / المخروط / التأثير / الكسارة المتنقلة، وما إلى ذلك.
احصل على عرض أسعار
