Skip to main content Skip to navigation. Lucy Balshaw. Topics aqua regia Earth gold platinum Pollution precious metals Recycling Sustainability. Related articles. Research Antimony recovery lights up lamp waste recycling TZ Green method produces fertiliser as a byproduct. Research Collaboration reduces barriers to rare earth separation TZ Photochemistry selectively removes europium from red lamp phosphor. Research Ionic liquid a perfect fit for rare earth recycling TZ Urban mining could soon be commonplace.
Load more articles. You're not signed in. To link your comment to your profile, sign in now. Only registered users can comment on this article. Sign in Register. More News. This is similar to aqua regia , which can dissolve gold, palladium, and platinum well, but can only dissolve rhodium effectively if it is in a finely powdered form. The researchers suggest that a multi-stage leaching process might be employed, with fresh solvent used each time to boost the dissolution of platinum and rhodium.
They also add that a scaled-up process will need optimizing to reduce any aluminum contamination of the noble metals retrieved from spent catalytic converters and other devices, such as fuel cells.
Please note that to comment on an article you must be registered and logged in. Registration is for free, you may already be registered to receive, e. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation. If you would like to reuse any content , in print or online, from ChemistryViews. Magazine of published by Wiley-VCH. They are made of lac varnish, colored yellow with turmeric, or gamboge. Applied to polished metal or wood, they resemble bright brass more than gold.
They Rre made by dissolving lac in alcohol—about half a pound to the gallon of spirits, adding half a pound of turmeric and one ounce of gamboge, then straining the mixture, after it is about a day old, through a clean piece of cotton cloth. It is then ready for use, to be put on with a brush, or the article to be lacquered dipped into it. This article was originally published with the title "Gold Washes" in Scientific American 13, 28, March Already a subscriber?
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