Contact Us

Home   /   Contact

Keep In Touch With Us.

Location

Zhengzhou, China

An Updated Review of Toxicity Effect of the Rare Earth

The increasing usage of rare earth elements has raised concern about environmental toxicity, which may further cause harmful effects on human health. The study aims to review the toxicity analysis of these rare earth elements concerning aquatic biota, considering it to

Rare earth: health and environment effects health effects

Rare earth: health and environment effects; Effects on human health; Whether rare earth elements are harmful or not depends on the amount and duration of exposure. Usually, only when a person is exposed to a great quantity of REE over a long time, is it possible the result will be serious.

Effect of Rare Earth Ce on the Microstructure and

The effect of rare earth Ce on mechanical properties is studied by investigating the precipitates evolution during heat treatment of 34CrNiMo6 steel. Five different rare earth Ce contents are carried out with the same holding time 3 hours. Then, the mechanical properties of 34CrNiMo6 steel are obtained under steady state conditions and impact conditions, respectively.

The effect of rare-earth (La, Sm, Dy, Ho and Er) and Mg on

Jun 01, 1999 The effect of rare-earth elements, La, Sm, Dy, Ho and Er, on the microstructure in BaTiO 3 (BT)–MgO–rare-earth oxide based system was studied. Larger amount of MgO was required to suppress the grain growth for the larger ionic radius rare-earth ion (La, Sm)-doped samples than for the smaller ion (Dy, Ho, Er)-doped samples.

Don't Panic about Rare Earth Elements Scientific American

May 31, 2019 The 17 rare earth elements, which cluster near the bottom of the periodic table, play a vital role in several industries: consumer electronics including Apple AirPods and iPhones, green

rare-earth element Uses, Properties, & Facts Britannica

Discovery and history. Although the rare earths have been around since the formation of Earth, their existence did not come to light until the late 18th century.In 1787 the Swedish army lieutenant Carl Axel Arrhenius discovered a unique black mineral in a small quarry in Ytterby (a small town near Stockholm). That mineral was a mixture of rare earths, and the first individual element to be

Rare Earth Hypothesis: Meaning, Theory with a Simple

Oct 05, 2020 The Rare Earth Hypothesis argues that the development of complex life on Earth, not to mention intelligence, was an incredibly improbable thing in terms of the geological and astronomical variables involved, suggesting that the galaxy is not filled with other intelligent life forms waiting to

Rare earth: health and environment effects health effects

Rare earth: health and environment effects; Effects on human health; Whether rare earth elements are harmful or not depends on the amount and duration of exposure. Usually, only when a person is exposed to a great quantity of REE over a long time, is it possible the result will be serious.

The effect of rare-earth (La, Sm, Dy, Ho and Er) and Mg on

Jun 01, 1999 The effect of rare-earth elements, La, Sm, Dy, Ho and Er, on the microstructure in BaTiO 3 (BT)–MgO–rare-earth oxide based system was studied. Larger amount of MgO was required to suppress the grain growth for the larger ionic radius rare-earth ion (La, Sm)-doped samples than for the smaller ion (Dy, Ho, Er)-doped samples.

China’s Rare Earth Threat Sparks An International Backlash

Aug 07, 2020 In effect, three countries have moved in near-unison to accelerate the development of a non-Chinese supply of rare earths in the days after Chinese

Effect of Rare Earth Ce on the Microstructure and

The effect of rare earth Ce on mechanical properties is studied by investigating the precipitates evolution during heat treatment of 34CrNiMo6 steel. Five different rare earth Ce contents are carried out with the same holding time 3 hours. Then, the mechanical properties of 34CrNiMo6 steel are obtained under steady state conditions and impact conditions, respectively.

Physiological and Biochemical Effects of Rare Earth

Feb 14, 2007 The rare earths include the elements scandium [Sc, atomic number (Z) = 21], yttrium (Y, Z = 39), and the lanthanides from lanthanum (La, Z = 57) to lutetium (Lu, Z = 71). Crop responses to application of rare earth elements (REEs) have only been documented in a few countries.

The collapse of American rare earth mining — and lessons

Nov 12, 2019 The dream of a one-stop American rare earths solution was over, and the private sector had little appetite for reviving it. The history of Molycorp is littered with “what ifs.” What if the

A Look at Rare Earth Metals and Their Applications

Dec 04, 2019 Rare Earth Metals and Their Applications . In the periodic table of the elements, the third column lists the rare earth elements. The third row of the third column is expanded below the chart, listing the lanthanide series of elements. Scandium and Yttrium are listed as rare earth metals, although they are not part of the lanthanide series.

Executive Order on Addressing the Threat to the Domestic

Sep 30, 2020 The United States now imports 80 percent of its rare earth elements directly from China, with portions of the remainder indirectly sourced from China through other countries.

Regulation of environmental and health impacts in the rare

Regulation of environmental and health impacts in the rare earth element industry. Rare Earth Element (REE) mining, processing and exploitation are large scale industries that use a wide range of chemical substances and generate significant quantities of waste.

This Is How to Solve America's Rare-Earths Dilemma The

Jun 28, 2019 Rare earths comprise seventeen chemical elements with unique electric and magnetic qualities vital for the electronics and clean energy industries. The

The Geopolitics of Rare Earth Elements Stratfor

The rare earth elements are already critical to the U.S. defense sector, but rare earth mining, processing and fabrication capabilities will even more strongly influence geopolitical dynamics in the coming years as the world undergoes its nascent energy transition and transportation evolution.In the near term, China will benefit from its near-monopoly, but ultimately its own growing domestic

Here's why China's trade war threat to restrict rare earth

May 30, 2019 Rare earth minerals are commonly used in high-tech devices, automotives, clean energy and defense. About 35% of global reserves are in China, the most in

What are rare earth elements, and why are they important

Rare earth elements are an essential part of many high-tech devices. The U.S. Geological Survey news release "Going Critical" explains: "Rare-earth elements (REE) are necessary components of more than 200 products across a wide range of applications, especially high-tech consumer products, such as cellular telephones, computer hard drives

Rare earth: health and environment effects health effects

Rare earth: health and environment effects; Effects on human health; Whether rare earth elements are harmful or not depends on the amount and duration of exposure. Usually, only when a person is exposed to a great quantity of REE over a long time, is it possible the result will be serious.

What are rare earth elements, and why are they important

Rare earth elements are an essential part of many high-tech devices. The U.S. Geological Survey news release "Going Critical" explains: "Rare-earth elements (REE) are necessary components of more than 200 products across a wide range of applications, especially high-tech consumer products, such as cellular telephones, computer hard drives

Physiological and Biochemical Effects of Rare Earth

Feb 14, 2007 The rare earths include the elements scandium [Sc, atomic number (Z) = 21], yttrium (Y, Z = 39), and the lanthanides from lanthanum (La, Z = 57) to lutetium (Lu, Z = 71). Crop responses to application of rare earth elements (REEs) have only been documented in a few countries.

A Look at Rare Earth Metals and Their Applications

Dec 04, 2019 Rare Earth Metals and Their Applications . In the periodic table of the elements, the third column lists the rare earth elements. The third row of the third column is expanded below the chart, listing the lanthanide series of elements. Scandium and Yttrium are listed as rare earth metals, although they are not part of the lanthanide series.

The Geopolitics of Rare Earth Elements Stratfor

The rare earth elements are already critical to the U.S. defense sector, but rare earth mining, processing and fabrication capabilities will even more strongly influence geopolitical dynamics in the coming years as the world undergoes its nascent energy transition and transportation evolution.In the near term, China will benefit from its near-monopoly, but ultimately its own growing domestic

(PDF) Social and Environmental Impact of the Rare Earth

The use of rare earth elements in various technologies continues to grow despite some alternatives being found for particular uses. Given a history of ecological concerns about pollution from rare

Separation of Heavy Rare-Earth Elements from Light Rare

the light rare-earth elements (LREEs), i.e., lanthanum through gadolinium; and the heavy rare-earth elements (HREEs), i.e., terbium through lutetium plus yttrium [18]. The common property of the LREEs is the increasing number of unpaired electrons from 0 to 7, while the HREEs have the increasing number of paired electrons from 8 to 14.

Executive Order on Addressing the Threat to the Domestic

Sep 30, 2020 The United States now imports 80 percent of its rare earth elements directly from China, with portions of the remainder indirectly sourced from China through other countries.

China Wrestles with the Toxic Aftermath of Rare Earth

Jul 02, 2019 “The rare earth industry is a pillar industry here in Ganzhou and we must keep it running, but there’s still more to do to figure out a truly environmentally friendly method to pursue sustainable growth,” Zhang Guanjun, deputy director of the public relations department of the Ganzhou Party Committee, said in an interview. “Ironically

The Strange Second Life of America's Only Rare Earth Mine

And crucially, it added, “several of the rare earths are excellent absorbers of slow neutrons, and their poisoning effect on the action of nuclear-energy piles has stimulated intensive study of

Rare-earth element Properties of the metals Britannica

Rare-earth element Rare-earth element Properties of the metals: As noted above, the rare-earth elements—especially the lanthanides—are quite similar. They occur together in nature, and their complete separations are difficult to achieve. However, there are some striking differences, especially in the physical properties of the pure metallic elements.

Rare earth elements aren’t the secret weapon China thinks

May 23, 2019 Rare earth elements are described as the ‘vitamins of chemistry’ — producing powerful effects in small doses. America’s trade war with China has been quietly escalating for years, but this

Mining the consequences of the rare earths industry Greenbiz

Rare earth magnet components often cost 10 or more times the price of their less efficient, more common counterparts, and any disruption in supply will only lead to a widening of the price gap. When faced with a long-term drop in the supply of rare earth metals, manufacturers will be forced to choose between passing the costs onto the consumer

Boom in Mining Rare Earths Poses Mounting Toxic Risks

Jan 28, 2013 The mining of rare earth metals, used in everything from smart phones to wind turbines, has long been dominated by China. But as mining of these key elements spreads to countries like Malaysia and Brazil, scientists warn of the dangers of the toxic and radioactive waste generated by the mines and processing plants.