scholarly journals Urban geochemistry and human-impacted imprint of dissolved trace and rare earth elements in a high-tech industrial city, Suzhou

Elem Sci Anth ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Shilin Gao ◽  
Zhuhong Wang ◽  
Qixin Wu ◽  
Wanfa Wang ◽  
Chaochao Peng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Human Activities ◽  
Significant Positive Correlation ◽  
High Tech ◽  
Urban Geochemistry ◽  
Rapid Urbanization ◽  
Positive Correlation ◽  
Industrial City ◽  
Urban Sewage

Due to the rapid urbanization process, the consumption of trace and rare earth elements has dramatically increased. Although some elements have been extensively studied due to their high biological toxicity, most elements are ignored and taken seriously in recent years. Here, we investigated the urban geochemistry, source, and anthropogenic responding factor for 15 trace elements (Cd, Pb, Co, Sn, Cu, Ni, V, As, Mo, Sb, Al, Li, Fe, Zn, and Sr) and rare earth elements in surface water of the Suzhou city. The percentage of anthropogenic gadolinium vary from 46.9% (YCH-2) to 92.8% (WS-2), while the analysis of variance shows that human activities may affect the distribution of Cd, Co, Sn, Ni, As, Li, Fe, and Sr. Three clusters are obtained from the correlation and cluster analysis. The Cluster 1 with a significant positive correlation of Pb, Cd, Gd, Li, Sr, Co, Fe, Ni, and Sn reflecting these elements are dominantly influenced by urban sewage and industrial activities. The Cluster 2 (Zn, Cu, and Al) can be attributed to geologic sources, while the Cluster 3 (V, Mo, As, and Sb) indicate the combined action of agricultural and urban activities. The Gd versus Li plot showed a significant positive correlation, which can be used as a new indicator to trace the anthropogenic impact on urban waters. Overall, this study provides clear evidence that the content and distribution of Gd and Li are deeply affected by human activities in a high-tech industrial city (Suzhou), which can be regarded as emerging elements contaminations.

scholarly journals Editorial for Special Issue “Leaching of Rare Earth Elements from Various Sources”

Minerals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 164
Author(s):  
Kenneth N. Han
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
High Strength ◽  
Green Energy ◽  
High Tech ◽  
Special Issue ◽  
Important Group ◽  
Military Applications

Rare earth elements (REEs) have become an important group of metals used in many high-tech industries, including high-strength magnets, plasma TVs, various military applications, and clean and efficient green energy industries [...]

scholarly journals Study of the content of rare and rare earth elements in ash and slag waste of the Kemerovo state district power plant

2021 ◽  
Vol 315 ◽  
pp. 02004
Author(s):  
Tatiana Cherkasova ◽  
Anastasia Tikhomirova ◽  
Elizaveta Cherkasova ◽  
Andrey Golovachev
Keyword(s):  
Rare Earth ◽  
Power Plant ◽  
Rare Earth Elements ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
High Tech ◽  
Inductively Coupled ◽  
Ash And Slag Waste ◽  
Slag Waste

In the context of restrictions due to the sanctions imposed, a key factor in the country's development is the development of new Russian high-tech materials and their production technologies. The study of ash and slag waste from the Kemerovo State District Power Plant was carried out in this work using the methods of inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS). It has been established that matrix elements make up the predominant share of ash and slag waste. Rare and rare earth elements in terms of their content are classified as trace elements, however, some of them either have commercial values, or are close to it.

scholarly journals Electrochemical behaviours of Eu(III)/E(II) and Ce(IV)/Ce(III) in H3PO4-H2O media : solvation and complexation reactions

2018 ◽  
Vol 149 ◽  
pp. 01092
Author(s):  
B. Belqat ◽  
S. Belcadi
Keyword(s):  
Rare Earth ◽  
Phosphoric Acid ◽  
Rare Earth Elements ◽  
Electrochemical Properties ◽  
Essential Elements ◽  
High Tech ◽  
Electrochemical Studies ◽  
Redox Potentials ◽  
Complexation Reactions ◽  
Phosphoric Acid Concentration

Many kinds of rare earth elements (REE) such as europium and cerium have been make them essential elements in many high-tech components. The electrochemical studies can be presented as an interesting indication for europium and cerium extraction from phosphoric solutions, including solvation and complexation reactions. The normal redox potentials of Eu3+/Eu2+ and Ce4+/Ce3+ systems have been determined in H3PO4-H2O media with various phosphoric acid concentration. The solvation of these elements in phosphoric media is characterized by their transfer activity coefficients "f" calculated from the corresponding normal redox potentials. The corresponding solvation increases with increasing the H3PO4 concentration. For each REE, the electrochemical properties depend on its number of charges and on its basic properties. Results suggest that solvation and complexation of REE phosphates are important in controlling REE concentration.

scholarly journals Metallurgical Evaluation of the Hoidas Lake Rare Earth Deposit

10.30544/507 ◽  
2020 ◽  
Vol 26 (2) ◽  
pp. 143-162
Author(s):  
Corby Gerard Anderson ◽  
Paul J Miranda
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Research Effort ◽  
High Tech ◽  
Heavy Rare Earth ◽  
Hybrid Car ◽  
Work Index ◽  
Bond Work Index ◽  
Heavy Rare Earth Elements ◽  
Metallurgical Evaluation

Hoidas Lake lies in the Northern Rae Geological Province, in the general vicinity of many of Saskatchewan's large uranium mines. The mineralogy of the Hoidas Lake rare-earth deposit differs from most other such deposits in that it is hosted in equal abundance in veins containing apatite and allanite mineral groups. Hoidas Lake also differs from other deposits in that it contains a significant amount of heavy rare-earth elements, such as dysprosium. This abundance of heavy Rare Earth Elements (REE’s) is significant, as there is a growing demand for the heavier rare earths in high-tech manufacturing (such as the use of dysprosium in the manufacturing of hybrid car components). Recently, metallurgical testing was performed on a Hoidas Lake REE deposit composite. These investigations included characterization, flotation testing, heavy media separation, magnetic separation testing, whole ore leaching studies, bond work index grindability testing, and relative abrasion index testing. This paper summarizes this research effort.

scholarly journals GEOLOGICAL INDUSTRIAL ASSESSMENT AND RANKING OF PROMISING OBJECTS OF THE DOMESTIC BASE OF RARE EARTH ELEMENTS

2021 ◽  
pp. 32-40
Author(s):  
V. Mykhailov ◽  
M. Kurilo ◽  
S. Kosharna
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Industrial Development ◽  
Raw Materials ◽  
Technological Development ◽  
Energy Transition ◽  
Green Energy ◽  
High Tech ◽  
Mining Operations ◽  
Field Development

Changes in the priority areas of financing in the field of subsurface use and their widespread reorientation to the search for alternative sources of raw materials which could ensure the development of modern high-tech industries are the promising direction for the country's growth in sustainable development conditions and Green Energy Transition. And at the moment the only resource that can ensure safe progress in the future and plays an important role in today's technological development is rare earth elements (REE). Within the framework of this study information on the current state of awareness about the REE mining prospects in Ukraine was analyzed and generalized; the systematization and updating of available data on quantitative and qualitative REE ore occurrences and deposits characteristics and their geological and industrial parameters was done; the main obstacles / barriers to the active mining development on these objects of potential extraction were identified. The obtained ranking results of domestic deposits and REE manifestations prove the expediency of investing in geological exploration and mining operations conducted in certain areas, which are identified as the most attractive for further industrial development and generally emphasize the prospects of the studied area and justify the need in intensification of selected rare earth objects field development.

scholarly journals THE NEWEST ANALYTICAL TECHNOLOGIES FOR DETERMINING RARE-EARTH ELEMENTS IN GRANITOIDS OF THE UKRAINIAN SHIELD

2021 ◽  
Vol 17 (1) ◽  
pp. 96-102
Author(s):  
Олександр Пономаренко ◽  
Анатолій Самчук ◽  
Катерина Вовк ◽  
Ольга Заяць ◽  
Ірина Кураєва
Keyword(s):  
Mineral Resource ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Ukrainian Shield ◽  
High Tech ◽  
Resource Base ◽  
Icp Ms ◽  
Relative Standard ◽  
Rare Earth Mineral

Introduction. To date, rare earth elements (REE) are used to manufacture most high-tech goods and are crucial in defense technologies (lasers, radars, and electromagnetic weapons), nuclear engineering, metallurgy, and others. All this determines the relevance of their study to assess the rare earth mineral resource base of Ukraine. Problem Statement. The determination of REE in rocks and minerals is a fundamental problem in geochemistry and petrology for understanding the processes of rock formation. However, it is a complex analytical task related to the similar chemical properties of these elements, which are caused by the "lanthanide compression effect". Purpose. The purpose is to develop analytical technologies for determining REE content by the ICP-MS method, to evaluate their content and distribution in granitoids of the Ukrainian Shield. Materials and Methods. The hybrid method of ICP-MS analysis and microwave decomposition of rocks and minerals has been used to measure the REE content. This technique has been tested and used to estimate the content and distribution of REE in fluorites and rare-metal granitoids of the Rusko-Polyanskyi massif of the Korsun-Novomirgorod pluton of the Ukrainian Shield. Results. Analytical technologies for determination of REE in granites and minerals have been developed. The method for determining REE in fluorites and granites without their prior concentration in the range from 0.01 to 1000 ppm with a relative standard deviation of 0.01–0.10 has been described. The content of rare earth elements in the Rusko-Polianskyi granites increases (218–797 g/t), the main concentrator of these elements is fluorite (692–26933 g/t REE). An inverse relationship has been observed between the REE content in fluorites and granites. Conclusions. The developed analytical technologies are the basis for establishing quality assessment criteria and developing principles for the rational use of rare-earth granitoids to create a rare-earth mineral resource base in Ukraine.

scholarly journals SILVER IN THE GOLD DEPOSITS OF THE AMUR REGION

2021 ◽  
pp. 130-136
Author(s):  
NATALIA VALENTINOVNA MOISEENKO ◽  
◽  
SVETLANA MIKHAILOVNA AVRAMENKO ◽  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Negative Correlation ◽  
Gold Deposits ◽  
Amur Region ◽  
Positive Correlation ◽  
Lead And Cadmium ◽  
Native Silver

The main minerals of native silver hubs on gold deposits of the Amur region (Albyn, Malomyr, Pioner, Pokrovskoe) were studied. It has been established that silver has a positive correlation with gold, zinc, arsenic, antimony, lead and cadmium. There is a negative correlation of silver with zirconium, yttrium, hafnia, tantalum and rare earth elements.

scholarly journals The Potential Utilizing of Critical Element from Coal and Combustion Residues

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4710
Author(s):  
Yunhu Hu ◽  
Mu You ◽  
Guijian Liu ◽  
Zhongbing Dong ◽  
Facun Jiao ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Energy Efficient ◽  
High Tech ◽  
Critical Element ◽  
Recycled Materials ◽  
Critical Elements ◽  
High Concentrations ◽  
Alternative Sources ◽  
Combustion Residues

Strategically critical elements are becoming significant for the rising demand of emerging energy-efficient technologies and high-tech applications. These critical elements are mostly geologically dispersed, and mainly recovered from recycled materials. Coal with high concentrations of critical elements is supposed to stable alternative sources. The abundances of critical elements in coal varies widely among different deposits and regions. The high concentrations of critical elements are found in many Chinese and Russian coal ores. The global mining potential ratio (MPR) is applied and suggests scandium, hafnium, cesium, yttrium, germanium, gallium, thallium, strontium and rare-earth elements could be potential recovery from coal. A number of benefits are expected with the extraction of critical elements during coal utilization.

Tauride Carbonate Platform Bauxite Deposits (Turkey) as an Alternative Source for Gallium

2021 ◽  
Author(s):  
Hatice Nur Bayram ◽  
Ali Erdem Bakkalbasi ◽  
Zeynep Doner ◽  
Ali Tugcan Unluer ◽  
Huseyın Kocaturk ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Carbonate Rocks ◽  
Carbonate Platform ◽  
Primary Source ◽  
Geochemical Data ◽  
Strong Positive Correlation ◽  
Alternative Source ◽  
Positive Correlation ◽  
Bayer Liquor

<p>Mediterranean type karstic bauxite deposits are considered as the primary source for aluminum (Al) production in Europe. During the Al production, Gallium (Ga) is extracted from the so called Bayer-liquor during the processing of bauxite to alumina. Ga, a rare metal, is widely used in modern chemistry and electronic industry. During the past decades, the worldwide demand for Ga has been continuously increasing. In Turkey, karstic bauxite deposits are generally found with shallow marine carbonate rocks which were deposited during Mesozoic period and located in Tauride Carbonate platform. Most of these karstic bauxite deposits can be hosted considerable Ga enrichments, with other immobile elements such as rare earth elements (REE), titanium (Ti), lithium (Li), and iron (Fe). This work focuses on the revealing of the potential Ga enrichments in bauxides from different deposits of Turkey (Mortaş-Doğankuzu, Konya; Küçükkoraş, Karaman; Acıelma-Yoğunoluk, Kahramanmaraş bauxite deposits). Geochemical data of major and trace elements of studied bauxite deposits show that these deposits have significant Ga enrichments (up to 72.6 ppm), as well as the REE (up to 580 ppm), Ti (up to 1.8%), and Li (up to 428 ppm) enrichments. In addition, the Ga enrichments show strong positive correlation with heavy rare earth elements (HREE) and moderate positive correlation with Al, Fe, Ti, Li and Sn elements. In this context, it can be concluded that the most probable source for Ga is rock forming aluminosilicates of the source rock due to the substitution with Al<sup>3+</sup> and Fe<sup>3+</sup>. During weathering process Ga exhibiting immobile behavior much like Al and Fe. Gallium is than incorporated into Al-bearing phases and thus enriched in the bauxite. Presence of Li content can be also interpreted as a contribution from micaceous source such as meta-carbonate rocks of Tauride platform. Moreover, geochemical association between Ga, Ti, Li, tin (Sn) and HREE can be explained by the redox and pH conditions causing other ions seperated from shallow environments.</p>

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