rare earth environments

The demand for rare earth elements is expected to grow 400-600 percent over the next few decades, and the need for minerals such as lithium and graphite used …

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. With the diminishing …

By Mike Ives • January 28, 2013. In November, the first shipment of raw "rare earth" minerals arrived at an $800 million processing plant on Malaysia's east coast near the home of Tan Bun Teet. The plant, run by …

Semantic Scholar extracted view of "Trace and rare earth element geochemistry of black shale and kerogen in the early Cambrian Niutitang Formation in Guizhou province, South China: Constraints for redox environments and origin of metal enrichments" by D. Pi et al.

Ancient and modern types of sedimentary placer deposits formed in both alluvial and coastal environments have been signficant sources of the rare earth elements (REEs). The REE-bearing minerals in placer-type deposits are primarily monazite [(Ce,La,Nd,Th)PO4] and sometimes xenotime (YPO4), which are high-density (heavy) …

Geochemical Characteristics of Rare-Metal, Rare-Dispersed, and Rare-Earth Elements and Depositional Environments in the Shanxi Formation Coal, Huainan Coalfield, Anhui, China ... rare-dispersed (scattered), and rare-earth elements (TREs) in coal, 25 coal seam samples of the Shanxi Formation in the Huainan coalfield were …

Rare earth elements in Shanxi coal mainly occur in clay minerals, and some rare earth elements are adsorbed and enriched by ... lagoon and lower delta plain environments, while coal seams of the Shanxi Formation mainly formed in distributary bay environments on a lower delta plain32 (Figure 1). 3. SAMPLE AND METHODS

1 Introduction. Uranium, thorium, and rare earth elements (REEs) are vital components of today's modern world. They play a critical role in power generation and in many emerging technologies such as …

Rare Earth elements (REE) are a group of seventeen metals including the lanthanide series, scandium (Sc) and yttrium (Y). They are naturally present in the Earth crust and thus occur all together in the …

EXECUTIVE SUMMARY. The rare earths are of a group of 17 chemical elements, several of which are critical for the energy transition. Neodymium, praseodymium, dysprosium …

Lanthanides (Ln3+), known as rare earth elements, have recently emerged as enzyme cofactors, contrary to prior assumption of their biological inertia. Several bacterial alcohol dehydrogenases have ...

Recent studies show that high-technology rare earth elements (REEs) of anthropogenic origin occur in the environment including in aquatic systems, suggesting REEs are contaminants of emerging concern. However, compared to organic contaminants, there is a lack of comprehensive reviews on the anthropogenic sources, environmental …

Sloustcher said the heavy rare earths will be refined in a different building, adding that the project is just getting started. To fully domesticate the magnet supply chain, MP Materials also began construction on the United States' first rare earth magnetics factory in April 2022. Located in Fort Worth, Texas, the facility will be able to ...

The rare earth element contents in the Shanxi Formation coal have a negative correlation with CaO (r = −0.58), MgO (r = −0.46), and MnO (r = −0.42), which may be due to the leaching of groundwater and migration of carbonate minerals, or under certain conditions, carbonate minerals are metasomatized by quartz during burial diagenesis, …

The increasing number of rare earth elements (REEs) studies in the past decade has been induced by their wider applications in industry, including electronics and high technology. This review presents the brief characteristics of REE, their occurrence in abiotic and biotic systems, and their possible detrimental effects on the environmental …

The local environments of the rare-earth species have been studied by pulsed EPR spectroscopy of the Yb3+ spin probe (S = 1/2), revealing composition-dependent echo-detected lineshapes and strong hyperfine coupling with 19F nuclei in hyperfine sublevel correlation (HYSCORE) spectra consistent with the formation of Yb3+–F bonds. ...

Rare-earth elements (REE) are an essential component of numerous advanced technology applications including high efficiency batteries, emerging energy technologies, and key defense systems. The goal of this study was to assist in the evaluation of the distribution of rare earth element deposits in the southeastern U.S., …

Rare earth elements (REE) are a homogenous group of 17 chemical elements in the periodic table that are key to many modern industries including chemicals, consumer electronics, clean energy, transportation, health care, aviation, and defense. Moreover, in recent years, they have been used in agriculture. One of the consequences …

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 ...

Abstract. China has relatively abundant rare earth elements (REEs) reserves and will continue to be one of the major producers of REEs for the world market in the foreseeable future. However, due to the large scale of mining and refining activities, large amounts of REEs have been released to the surrounding environment and caused harmful ...

@article{osti_6706085, title = {Modeling of rare-earth element partitioning between particles and solution in aquatic environments}, author = {Erel, Y and Stolper, E M}, abstractNote = {The authors have modeled the partitioning of rare earth elements (REEs) between O-donor surface groups and aqueous solutions with a simple …

Here I synthesize major, trace, and rare earth element (REE) data in bulk chert from 49 sequences from continental margin, pelagic, and ridge-proximal environments, ranging in age from Early Paleozoic to Neogene, and develop a set of depositional chemical criteria applicable to cherts regardless of age, diagenetic history, …

This Resource combines amplicon sequencing, shotgun metagenomic sequencing and untargeted metabolomics to provide a global view of microbial–metabolite associations across Earth's environments.

Rare earth elements (REEs) are increasingly critical to the high-technology and low-carbon economy. With a shift to sustainable socioeconomic development that aims to be less fossil fuel dependent, global demand for REEs continues to rise, despite their uncertain supply chain and high environmental impact of production. Here, we review recent ...

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 …

Rare earth elements (REE) were analyzed in river waters, acid mine waters, and extracts of secondary precipitates collected in the Iberian Pyrite Belt. ... Mineralogical controls on mobility of rare earth elements in acid mine drainage environments Chemosphere. 2018 Aug;205:317-327. doi: 10.1016/j.chemosphere.2018.04.095. Epub 2018 Apr 17. ...

The production of rare earth elements, REE, has significantly increased over the past years, in parallel with the latest advances in nanotechnologies and representing a new group of emerging contaminants. They find application in construction, transport, agriculture, electronics, catalysis, and biomedicine.

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REE found in soils deposited after weathering of granitic source rocks. Occur primarily in China, sometimes called laterite deposits. REE adsorbed to kaolinite, halloysite and illite clay minerals. Ore is relatively low-grade, generally only …

Rare earth elements as indicators of different marine depositional environments in chert and shale Richard W. Murray; Richard W. Murray 1. Department of Geology and Geophysics, University of California, Berkeley,California 94720. ... Differences in rare earth element (REE) relative fractionations and total abundances in marine …

This work was undertaken to assess whether former mining operations on ion-adsorption rare earth mine sites have a significant impact on water bodies and soils of the surrounding environments. Tailing soil materials, stream waters and sediments, and farmland soils were collected from one of the largest ion-adsorption rare earth mine sites ...