Rare Earth and Rare Metal Elements Mobility and Mineralization During Magmatic and Fluid Evolution in Alkaline Granite System: Evidence from Fluid and Melt Inclusions in Baerzhe Granite, China

2013 ◽  
Vol 63 (3) ◽  
pp. 239-261 ◽  
Author(s):  
Yi Sun ◽  
Yong Lai ◽  
Jing Chen ◽  
Qihai Shu ◽  
Cong Yan
Keyword(s):  
Rare Earth ◽  
Melt Inclusions ◽  
Rare Metal ◽  
Alkaline Granite ◽  
Metal Elements ◽  
Fluid Evolution ◽  
Fluid And Melt Inclusions

Rare metal elements in the primary coal seam of Changzhi coalfield in Southeast Shanxi, China

2020 ◽  
Vol 38 (4) ◽  
pp. 1140-1158
Author(s):  
Chunhui Li ◽  
Yu Gao ◽  
Handong Liang ◽  
Qingyi Cao ◽  
Shikui Wang
Keyword(s):  
Rare Earth ◽  
Coal Seam ◽  
Inductively Coupled Plasma ◽  
Rare Metal ◽  
X Ray ◽  
Metal Elements ◽  
Inductively Coupled ◽  
Average Value ◽  
Industrial Grade ◽  
Permian Coal

Geochemistry characteristics of rare metal elements of No.15 Permian coal seam in Changzhi coalfield, such as concentration, distribution, occurrence, and mining value were investigated by low-temperature ashing prior to powder X-ray diffraction, X-ray fluorescence, inductively coupled plasma mass spectrometry, and field emission scanning electron microscopy equipped with energy-dispersive X-ray analysis. The results showed that the ∑REE concentrations ranged from 19.12 to 268.21 μg/g, with an average value of 91.74 μg/g; the average concentrations of Ga, Ge, and Th were 11.03, 1.96, and 15.09 μg/g, respectively. The concentration of rare earth elements (REEs), Th, Ga, and Ge, are all below the minimum industrial grade. However, the concentrations of rare earth oxides and Ge in high-temperature ash of some coal benches are higher than the minimum recoverable value and are thus potentially recoverable. The vertical distribution of REEs is uneven, with a maximum value adjacent to a minimum value. The source of the different layers of REEs was stable and influenced by seawater. Moreover, the ∑REE, Ga, and Th are enriched with the inorganic minerals and correlated with kaolinite. Ga and Th are also correlated with illite. Significant fractionation of REE is observed during the process of combustion.

scholarly journals The New Renewable Energy Consumption Policy of Rare Earth Metals to Build Indonesia's National Energy Security

2018 ◽  
Vol 68 ◽  
pp. 03008
Author(s):  
Muhamad Azhar ◽  
Solechan Solechan ◽  
Retno Saraswati ◽  
Putut Suharso ◽  
Suhartoyo Suhartoyo ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Rare Earth ◽  
Energy Security ◽  
Rare Earth Metals ◽  
Rare Metal ◽  
Energy Regulation ◽  
Legal Research ◽  
Renewable Energy Consumption ◽  
New Energy ◽  
National Energy Security

This study aims to discuss the policy of using renewable energy in the form of rare metal eart as an effort to build national energy security. The research method used a legal research looking from various perspectives in social science. Law is seen as a space for the process of scientific study in order to seek truth. The use of relevant legal research wants to understand the law more thoroughly. In performing implementation analysis, using the method of Regulatory Impact Assessment (RIA) with focus on energy regulation. The results of the study show that: First, the policy of the Indonesian republic government regarding the use of new energy and renewable energy aims to prepare the carrying capacity of national energy security. This policy has not fully gone well. The policy is not supported by consistency in issuing derivative policies. Second, the use of new energy and renewable energy, especially rare earth metals as part of efforts to encourage national energy security in Indonesia is still very far from expectations. The use of rare eart metal is only around 0.7% of the use of new energy. Efforts to explore and exploit rare earth metals have not been carried out in a timely manner. Whereas the potential of rare earth metals is a strategic community and has the potential to encourage national energy security in Indonesia. Indonesia is projected to produce rare earth metals reaching 20% of the world's supply.

scholarly journals Preparation of a Novel Polystyrene-Poly(hydroxamic Acid) Copolymer and Its Adsorption Properties for Rare Earth Metal Ions

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1905 ◽  
Author(s):  
Xiaoyan Cao ◽  
Qing Wang ◽  
Shuai Wang ◽  
Ruilin Man
Keyword(s):  
Rare Earth ◽  
Metal Ions ◽  
Surface Area ◽  
Hydroxamic Acid ◽  
Earth Metal ◽  
Rare Metal ◽  
Rare Earth Ions ◽  
Area Measurement ◽  
Bet Surface Area ◽  
Acid Copolymer

In this study, a novel polystyrene-poly(hydroxamic acid) copolymer was synthesized as an effective adsorbent for the treatment of rare earth elements. Through the use of elemental analysis as well as FTIR, SEM, XPS, and Brunauer-Emmett-Teller (BET) surface area measurement, the synthesized polymer was found to have a specific surface area of 111.4 m2·g−1. The adsorption performances of rare metal ions were investigated under different pH levels, contact times, initial concentrations of rare earth ions, and temperatures. The adsorption equilibrium for La3+, Ce3+, and Y3+ onto a polystyrene-poly(hydroxamic acid) copolymer is described by the Langmuir model, which confirms the applicability of monolayer coverage of rare earth ions onto a polystyrene-poly(hydroxamic acid) copolymer. The amount of adsorption capacities for La3+, Ce3+, and Y3+ reached 1.27, 1.53, and 1.83 mmol·g−1 within four hours, respectively. The adsorption process was controlled by liquid film diffusion, particle diffusion, and chemical reaction simultaneously. The thermodynamic parameters, including the change of Gibbs free energy (∆G), the change of enthalpy (∆H), and the change of entropy (∆S), were determined. The results indicate that the adsorption of resins for La3+, Ce3+ and Y3+ was spontaneous and endothermic. The polymer was also used as a recyclable adsorbent by the desorption experiment.

scholarly journals Facile Chemical Synthesis of Doped ZnO Nanocrystals Exploiting Oleic Acid

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1150 ◽  
Author(s):  
Sugata Barui ◽  
Roberto Gerbaldo ◽  
Nadia Garino ◽  
Rosaria Brescia ◽  
Francesco Laviano ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Rare Earth ◽  
Oleic Acid ◽  
Magnetic Resonance ◽  
Transition Metal ◽  
Rare Earth Elements ◽  
Resonance Imaging ◽  
Metal Elements ◽  
Doped Zno ◽  
Transition Metal Elements

Zinc oxide nanocrystals (ZnO-NCs) doped with transition metal elements or rare earth elements can be probed for magnetic resonance imaging to be used as a molecular imaging technique for accurate diagnosis of various diseases. Herein, we use Mn as a candidate of transition metal elements and Gd as a presenter of rare earth elements. We report an easy and fast coprecipitation method exploiting oleic acid to synthesize spherical-shaped, small-sized doped ZnO-NCs. We show the improved colloidal stability of oleate-stabilized doped ZnO-NCs compared to the doped ZnO-NCs synthesized by conventional sol–gel synthesis method, i.e., without a stabilizing agent, especially for the Mn dopant. We also analyze their structural, morphological, optical, and magnetic properties. We are able to characterize the persistence of the crystalline properties (wurtzite structure) of ZnO in the doped structure and exclude the formation of undesired oxides by doping elements. Importantly, we determine the room-temperature ferromagnetism of the doped ZnO-NCs. This oleate-stabilized coprecipitation method can be subjected as a standard procedure to synthesize doped and also co-doped ZnO-NCs with any transition metal elements or rare earth elements. In the future, oleate-stabilized Gd/Mn-doped ZnO-NCs can be exploited as magnetic resonance imaging (MRI) contrast agents and possibly increase the signal intensity on T1-weighted images or reduce the signal intensity on T2-weighted images.

scholarly journals Primary rare earth element enrichment in carbonatites: Evidence from melt inclusions in Ulgii Khiid carbonatite, Mongolia

2020 ◽  
Vol 117 ◽  
pp. 103294 ◽  
Author(s):  
Meng Feng ◽  
Wenlei Song ◽  
Jindrich Kynicky ◽  
Martin Smith ◽  
Clinten Cox ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Melt Inclusions ◽  
Element Enrichment
Sign in / Sign up

Export Citation Format

Share Document