Recovering metal(loids) and rare earth elements from …

Metal (loids) and Rare Earth Elements (REE) ('metals') are used in a wide range of products, and therefore, the improvement of expectations for everyday comforts with demand continues to grow. Metal-bearing wastes are a secondary source of raw material that can meet this demand by providing a previously unconsidered low impact supply …

A cleaner and sustainable method for recovering rare earth …

This paper proposes a sustainable and efficient process for recovering rare earth, cobalt, and iron from NLRs and concludes with the following conclusions. (1) Iron oxide is the main phase in NLRs and Rare earth mainly exists in the form of rare earth oxides. The hypothesis that some rare-earth oxides are encapsulated by iron oxide is …

Review of rare-earths recovery from polishing powder waste

Based on their CeO 2 content and area of application, rare-earth polishing powders can be classified as high-grade, medium-grade, or low-grade CeO 2 polishing powders (Luo et al., 2020). Table 1 lists the rare-earth content ranges of the three classes of rare-earth polishing powders and their corresponding areas of application. High …

A critical review of the recovery of rare earth elements from

Rare earth elements (REEs) are important strategic resources reserved by countries in the 21st century, especially in light of a global supply crisis stemming from …

Recent advances in functional materials for rare earth …

Recent advances in functional materials for rare earth recovery: A review - ScienceDirect. Sustainable Materials and Technologies. Volume 37, September 2023, …

Feasibility of Recovering Rare Earth Elements | netl.doe.gov

The DOE-NETL Rare Earth Element (REE) Program began in 2014, and is focused on extracting, separating and recovering REEs from coal and coal by-products. Rare earth elements (REEs) are essential dual use materials that are incorporated into many of …

How to build a circular economy for rare-earth …

10 July 2023. How to build a circular economy for rare-earth elements. Rare-earth elements that are crucial for clean-energy technologies are jealously fought over. Policies and programmes...

Recovering rare earth elements from phosphogypsum using …

1. Introduction. Phosphogypsum (PG) is a by-product of phosphoric acid production via a wet process. In this process, 70–85% of rare earth elements (REEs) originally present in the phosphate rock is concentrated in the PG (Hammas-Nasri et al., 2016).PG mainly consists of calcium sulfate (CaSO 4) dihydrate or hemihydrate along …

A novel approach for recovery of rare earths and

Abstract. It is difficult to economically recover rare earths (RE) and niobium (Nb) from Bayan Obo tailings by the existing metallurgical processes. In this study, a novel hydrometallurgy process was employed for separating and recovering RE and Nb from Bayan Obo tailings. Firstly, by sulfating roasting at 250 °C and subsequent leaching at …

Method of recovering rare-earth elements

Provided is a method of recovering rare-earth elements by performing slight pH adjustment of a leachate, which does not require such significant pH adjustment as in conventional methods, reduces cost and effort, and can efficiently recover rare-earth elements in a bauxite residue in a good yield. The method of recovering rare-earth …

Recovering rare earths, lithium and fluorine from rare earth …

Viewing the problem of high energy consumption in the process of recovering rare earths from rare earth molten salt electrolysis slag, an environmentally friendly and low carbon process by sub-molten salt decomposition was developed. The thermodynamic analysis of sub-molten salt reaction indicates that the recovery of rare …

A Fundamental Economic Assessment of Recovering Rare Earth …

In recent years, acid mine drainage (AMD) has emerged as a promising unconventional source of rare earth elements (REEs) and other critical minerals (CMs) such as cobalt and manganese. In this regard, AMD provides a natural heap leaching effect that extracts and concentrates REE/CM from the host strata creating a partially enriched …

Development of Solvent Extraction Methods for …

CHEMISTRY AND TECHNOLOGY OF RARE, TRACE, AND RADIOACTIVE ELEMENTS. Development of Solvent Extraction Methods for Recovering Rare Earth Metals. V. V. Belova. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991 Russia e-mail: [email protected]. Received April 29, 2015.

The Energy Transition Will Need More Rare Earth Elements.

Purdue University researchers have developed an innovative and inexpensive way to recycle coal ash to recover rare earth elements. Coal ash is as rich in rare …

Methods and systems for recovering rare earth elements

Embodiments of this invention provide systems for recovering rare earth elements from a material containing rare earth elements including a temperature and pressure controlled vessel into which is added the material and a rare earth element crystallization medium under solvothermal conditions sufficient to selectively crystallize the rare earth elements …

A safer and cleaner process for recovering thorium and rare earth …

A safer and cleaner process for recovering thorium and rare earth elements from radioactive waste residue. Author links open overlay panel Jia Su a b c, Yun Gao a b, Shuainan Ni a b c, Ruigao Xu d, Xiaoqi Sun a b c e. ... Rare earth elements (REEs) have attracted widely attentions because of their excellent properties, however, …

Toward Closing a Loophole: Recovering Rare Earth …

The demand for rare earth elements (REE) has increased significantly over the last decade, with global rare earth oxide (REO) production increasing markedly over the last 2 years from 132,000 t in 2017 to 210,000 t in 2019.1 This production increase is drive by the need for REE in high-technology equipment, particularly in the low-carbon energy …

Developing electrokinetic mining technology for recovering rare earth

A green and efficient technology to recover rare earth elements from weathering crusts - Nature Sustainability. Heavy rare earth elements are critical for modern technological applications, including renewable energy technologies, but their extraction can have disastrous environmental impacts.

A new method for recovering rare earth elements from the

The study also unveiled that 93% of rare earth metals of the fern were converted into its ash during the ashing process. Likewise, in another study, 92.3% weight of the harvested Dicranopteris ...

From trash to treasure: Electronic waste is mined for rare earth

Bhave's "mining" of an acidic solution with selective membranes joins other promising CMI technologies for recovering rare earths, including a simple process that crushes and treats magnets and an acid-free alternative. ... Most rare earth elements are lanthanides, elements with atomic numbers between 57 and 71 in the periodic table. ...

Recovering rare earth elements from contaminated soils: …

Rare earth elements (REE) are essential for sustainable energies such as solar and wind power, with rising demand due to the ambitious goal for a circular society.

Rare earth elements from waste | 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. With the diminishing …

Eco-friendly methodology for removing and recovering rare earth

In this study, response surface methodology (RSM) was applied with a Box–Behnken design to optimize the biosorption (removal and bioconcentration) of rare earth elements (REEs) (Y, La, Ce Eu, Gd, Tb) by living Ulva sp. from diluted industrial wastewaters (also containing Pt and the classic contaminants Hg, Pb, Zn, Cu, Co, and …

A green and efficient technology to recover rare earth

71 Altmetric. Metrics. 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 scarce....

Investigation on the recovery of thorium and rare earth from

Ion-adsorbed type rare earth ore (IATREO) contains more than 80% of medium and heavy RE elements in the world, which is a valuable strategic resource [4], [5]. ... A safer and cleaner process for recovering thorium and rare earth elements from radioactive waste residue. J. Hazard.

Recycling NdFeB Magnets and Rare Earth Fluorescent …

Loy 39 proposed a new hydrometallurgical method of recovering rare earth elements and cobalt from permanent magnets by mechanochemical-assisted iron sulfate leaching. Through grinding and activating NdFeB waste powder and iron sulfate powder, the metal is converted into corresponding water-soluble sulfate. The rare earth elements …

Rare Earth Elements Recovery Using Selective Membranes …

The separation of REEs by membranes usually occurs through three mechanisms: (1) complexation of REE ions with extractant that is embedded in the …

Toward Closing a Loophole: Recovering Rare Earth …

The demand for rare earth elements (REE) has increased significantly over the last decade, with global rare earth oxide (REO) production increasing markedly over the last 2 years from 132,000 t in 2017 to 210,000 t in 2019.1 This production increase is drive by the need for REE in high-technology equipment, particularly in the low-carbon energy

Selective dissolution of rare-earth element carbonates in …

Dissolution in choline-chloride based deep eutectic solvents of rare earth metals from high-purity single carbonate salts of Y, La, Ce, Nd and Sm and from their multicomponent mixtures and bastnäsite mineral was assessed with an aim to understand the leaching behavior of bastnäsite ores as REE source. The leaching system described …

Recovering metal(loids) and rare earth elements from …

Metal (loids) and Rare Earth Elements (REE) ('metals') are used in a wide range of products, and therefore, the improvement of expectations for everyday comforts with demand continues to grow. ... Barriers remain in recovering valuable materials present due to the unknown concentrations and distributions of metals in landfills and not meet ...

A high-performance impregnated resin for recovering thorium …

1. Introduction. The natural thorium, 232 Th, is a potential nuclear fuel because it can be transformed into fissile 233 U by absorbing slow neutrons [1].As for the rare earth (RE) separation industry, many RE waste residues containing Th were accumulated. The accompanied Th was not recovered as a by-product and caused environmental pollution.

Development of solvent extraction methods for recovering rare earth

Published works conducted in Russia and other countries over the last 10–15 years regarding the application of solvent extraction in technological processes for recovering rare earth metals from various mineral and technogenic raw materials (bastnesite, monazite, loparite, xenotime, kularite, etc.) were analyzed in the present …

How science could make recycling rare earth elements easier

Recycling rare earth elements is hard. Science is trying to make it easier. Recycling rare earth elements from existing high-tech products, like hard disk drives, might help meet demand for these ...

Recovery of rare earth elements from phosphogypsum waste …

Rare earth elements (REE) consist of lanthanides, scandium and yttrium. These precious metals are essential elements for modern technology. ... Recovering rare earth elements from phosphogypsum using a resin-in-leach process: selection of resin, leaching agent, and eluent. Hydrometallurgy, 189 (2019), p. 105125, …

Recovering Rare-Earth Metals from Waste

Conventional extraction methods from waste to recover rare-earth metals usually necessitate labor-intensive leaching processes using non-environmentally friendly strong acids. However, the Rice Lab's flash Joule heating process is able to heat waste products – including coal fly ash – to temperatures around 3,000 degrees Celsius in …