rare earth metal environmental protection

The rare earths are of a group of 17 chemical elements, several of which are critical for the energy transition. Neodymium, praseodymium, dysprosium and terbium are key to the production of the permanent magnets used in electric vehicles (EVs) and wind turbines. Neodymium is the most important in volume terms.

This involves dissolving the ores in a suitable leaching agent before extracting the rare earth metals using methods such as precipitation, fractional crystallisation, and chromatography (Shahbaz, 2022). ... (United States Environmental Protection Agency, 2022). The extraction of REEs often results in the generation of …

In this study, we focus on three processes that are most commonly used to produce rare earth metals. Light rare earths (La, Ce, Nd, Pr) make up over 90% of …

These metals, known as rare earth elements and found in phosphate and other rocks, are a vital component in wind turbines, electric vehicles and smart phones, but are now mostly imported from China. The United States mines and uses about 23 million tons of phosphate rock per year, according to the U.S. Environmental Protection …

All rare earth metals contain radioactive elements such as uranium and thorium, which can contaminate air, water, soil and groundwater. Metals such as arsenic, barium, copper, aluminum, lead and ...

United States Environmental Protection Agency. Search Search. Main menu. Environmental Topics; Laws & Regulations; About EPA; Health & Environmental Research Online (HERO) ... alkaline earth or rare earth metal) nitridosilicates on their structure and composition Author(s) ten Kate, OM; Zhang, Z; van Ommen, JR; Hintzen, …

Rare earth elements (REEs) are important raw materials for green technologies. However, REE mining and production uses techniques that are often not environmentally sustainable. Life cycle assessment (LCA) is a well-recognized method for evaluating the environmental impacts of products and technologies. This article provides an overview of the ...

Adsorption of rare earth metals, Eu (III) and Nd (III) was investigated on a new environmental friendly material, thiourea functionalized cellulose. Before usage, the synthesized material was ...

"We're partnered with the WV Department of Environmental Protection to build a pilot plant that will treat acid mine drainage while producing about one ton per year of rare earth and critical mineral …

Science Advances. 9 Feb 2022. Vol 8, Issue 6. DOI: 10.1126/sciadv.abm3132. Abstract. Rare earth elements (REEs) are critical materials in electronics and clean technologies. …

Japan's basic energy policy is to simultaneously achieve Energy security, Economic efficiency and Environmental suitability with the underlying premise that Safety is always the primary concern (3E + S). ... Furthermore, the demand for rare earth (a kind of rare metal, comprised of a group of 17 metal elements) is expected to increase along ...

The United States was the world leader in rare earth element production from the mid-1960s to the mid-1980s. The United States produced around 15 kilotons a year, compared to around five kilotons annually for the rest of the world combined. Nearly all of this production came from the America's largest rare earth element mine, which operated ...

Scientists say under-regulated rare earths projects can produce wastewater and tailings ponds that leak acids, heavy metals and radioactive elements into groundwater, and they point out that …

Addressing polymer topologies is one of the key methods for tailoring polymer properties. Herein, we report for the first time on the core-first synthesis of three-armed star-shaped polymers with adjustable molecular weights via rare earth metal-mediated group transfer polymerization (REM-GTP).

Abstract. Rare earth elements (REEs) are important raw materials for green technologies. However, REE mining and production uses techniques that are often not environmentally sustainable. Life cycle assessment (LCA) is a well-recognized method …

The commerce ministry said on its Web site on Tuesday that it had awarded export quotas totaling 14,446 tons to 31 Chinese-owned and foreign-owned companies. A year ago, the ministry had awarded ...

The core conclusions are as follows: (1) Environmental regulation significantly promotes rather than restrains China's rare earth export. (2) According to the rare earth production process, this paper divides rare earth products into 3 kinds, that is, rare earth raw materials, rare earth useful components and rare earth end-use …

Heavy rare earth elements (HREEs) such as Gd–Lu, Sc and Y are irreplaceable metals for a number of critical (including clean) technologies, but they are scarce. Ion-adsorption deposits, which ...

Faced with these mounting environmental disasters, as well as fears that it was depleting its rare earth resources too rapidly, China slashed its export of the elements in 2010 by 40 percent.

The design and synthesis of new metal–organic frameworks (MOFs) is important from both a fundamental and application standpoint. In this work, a novel, highly connected rare-earth (RE) MOF with an shp topology is reported, named RE-CU-10 (RE, rare-earth; CU, Concordia University), composed of a nonanuclear RE(III)-cluster node (RE = Y(III) and …

Chemistry, Environmental Science. Separations. 2024. The hot spot extraction agent N,N,N′,N′-tetraoctyl-3-oxoglutaramide (TODGA) has the advantages of novelty, high efficiency and environmental protection in the separation of rare earths by tandem…. Expand.

Rare Earth Elements. Rare earth oxides of gadolinium, praseodymium, cerium, samarium, lanthanum, and neodymium. Photo courtesy of USDA ARS. Rare earth elements (REEs), which comprise of only 17 elements from the entire periodic table, play a critical role to our national security, energy independence, environmental future, and economic growth.

How rare earth elements' hidden properties make modern technology possible. These 17 metals fine-tune light and generate powerful magnetic fields. In August, China finished constructing a maglev ...

United States Environmental Protection Agency. Search Search. Main menu. Environmental Topics; Laws & Regulations; About EPA; Health & Environmental Research Online (HERO) ... Studies on Homo- and Co-polymerizations of Polar and Non-polar Monomers Using Rare-earth Metal Catalysts Author(s) Cui, Dmei;, Year. 2020 …

"We're partnered with the WV Department of Environmental Protection to build a pilot plant that will treat acid mine drainage while producing about one ton per year of rare earth and critical mineral concentrate," said Paul Ziemkiewicz, WVWRI director and principal investigator. "NETL wants us to take it to the next step and assess the ...

For every ton of rare earth produced, the mining process yields 13kg of dust, 9,600-12,000 cubic meters of waste gas, 75 cubic meters of wastewater, and one ton of radioactive residue. This stems from the fact that rare earth element ores have metals that, when mixed with leaching pond chemicals, contaminate air, water, and soil.

2-Rare Earth Based Oxide Materials and Barrier Coatings for Thermal Protection Systems Dongming Zhu and Bryan Harder Environmental Effects and Coatings Branch Materials and StructuresDivision NASA John H. Glenn Research Center Cleveland, Ohio 44135, USA Materials Science & Technology 2014 Conference & Exhibition October 12-16, 2014

Abstract. Heavy rare earth elements (HREEs) such as Gd–Lu, Sc and Y are irreplaceable metals for a number of critical (including clean) technologies, but they are …

The UN Environment Programme estimated that over 53 million tons of e-waste were generated in 2019, including $57 billion worth of raw materials laced with rare earth elements and precious metals …

Some rare earth metals require substantial processing, and that provides a number of opportunities for pollution at every step of the way. ... let alone environmental protection.

Rare-earth elements (REEs) are a group of 17 elements with similar chemical properties, including 15 in the lanthanide group, yttrium, and scandium. Due to their unique physical and chemical properties, REEs gain increasing importance in many new energy technologies and systems that contribute to reduce greenhouse gas emissions and fossil …

EDITORIAL. 19 July 2023. The global fight for critical minerals is costly and damaging. Elements such as rare-earth metals are crucial for the clean-energy transition. …

Rare earth elements (REEs) are a group of 15 chemical elements in the periodic table, specifically the lanthanides. Two other elements, scandium and yttrium, …

2 Institute for Environmental Protection and Sensors, Beloruska 7, 2000 Maribor, Slovenia; University of Maribor, Faculty of Mechanical Engineering, Smetanova 17, 2000 Maribor, Slovenia. ... Furthermore, desorption and reusability of rare earth metals and nanomaterials are discussed. On the basis of this review it can be concluded that ...