https://min-eng.blogspot.com/2013/02/the-real-cost-of-using-neodymium-in.html https://min-eng.blogspot.com/2013/02/the-real-cost-of-using-... "Neodymium is fou

https://min-eng.blogspot.com/2013/02/the-real-cost-of-using-neodymium-in.html https://min-eng.blogspot.com/2013/02/the-real-cost-of-using-... "Neodymium is found most often in monazite and bastnasite. Due to the fact that these minerals also contain lanthanides and other rare earth elements, it is difficult to isolate neodymium. The first isolation process involves extracting the lanthanides and metals out of the ores in their salt form. This step is carried out using sulphuric acid, hydrochloric acid, and sodium hydroxide. To further isolate the neodymium from other lanthanides and metals, procedures such as solvent extraction and ion exchange are used. Once neodymium has been reduced to its fluoride form using these processes, it can be reacted with pure calcium metal in a heated chamber to form pure neodymium and calcium fluoride. Some calcium contaminants remain in the neodymium, and vacuum processes are used to remove any of these contaminants. It is an expensive and potentially environmentally harmful process. In a recent posting (February 1st), it was noted that China produces over 90% of the world’s rare earths, and that Beijing’s export reductions in recent years have forced high-tech firms to relocate to China. An article in a UK newspaper claims to have uncovered the distinctly dirty truth about the process used to extract neodymium: it has an appalling environmental impact that raises serious questions over the credibility of so-called green technology. According to the report, hidden out of sight behind smoke-shrouded factory complexes lie vast, hissing cauldrons of chemicals in tailing lakes that are often very poorly constructed and maintained; throughout the extraction process large amounts of highly toxic acids, heavy metals and other chemicals are emitted into the air that people breathe, and leak into surface and ground water. The report concludes that whenever we purchase products that contain rare earth metals, we are unknowingly taking part in massive environmental degradation and the destruction of communities. It is a real dilemma for environmentalists who want to see the growth of the renewables industry but we should recognise the environmental destruction that is being caused while making these wind turbines."