Modern alchemy leaches gold from water

Oct 28, 2012 by Marc Preel
A 10kg gold bar at Austrian bullion firm Oegussa. A small French start-up company is selling a technology with a hint of alchemy: turning water into gold.

A small French start-up company is selling a technology with a hint of alchemy: turning water into gold.

It does so by extracting from industrial the last traces of any rare—and increasingly valuable—metal.

"We leave only a microgramme per litre," according to Steve van Zutphen, a Dutchman who founded Magpie Polymers last year with a fellow 30-year old Frenchman Etienne Almoric.

"It's the equivalent of a sugar lump in an Olympic swimming pool."

Magpie Polymers operates from slightly shabby premises at a factory at Saint-Pierre-les-Nemours 80 kilometres (50 miles) southeast of Paris.

But it is at the leading edge of technology with a procedure developed at the prestigious Ecole Polytechnique in 2007.

The process is based on the use of tiny pellets of through which waste water is pumped. Gold, platinum, and rhodium, the world's most , little by little stick to the pellets and are thus separated from the waste water.

A single litre of this patented resin can treat five to 10 cubic metres of waste water and recover 50 to 100 grammes of precious metal, equivalent to "3,000 to 5,000 euros ($3,900 to $6,500)," Almoric said.

The platinum identifier stamp is seen inside a platinum ring at the Union Street Goldsmith in San Francisco. Gold, platinum, palladium and rhodium, the world's most precious metals, are retrieved from waste water by French startup Magpie Polymers.

Mobile phones, and countless other everyday products contain these precious metals.

But once they are scrapped, the problem lies in retrieving the particles of precious metals.

"What is complicated is that the amounts are infinitesimal, so hard to recover," according to Steve van Zutphen.

Once they have been separated and crushed some industrial waste products have to be dissolved with acid in water. Then the metals in the water have to be recovered whether they are valuable or not.

"There are many technologies to get metal from water that have existed since the 19th century. But there comes a moment when existing technologies are no longer effective or become too expensive," van Zutphen said.

The chief markets to which the two entrepreneurs are looking are the "refiners": specialists in the recovery of precious metals, such as British firm Johnson Matthey, the Anglo-French company Cookson-Clal and Boliden of Sweden.

But the technology could also be of interest to mining groups or large water treatment companies such as French Veolia or Suez Environnement.

The timing is good. The economic crisis has revived interest in gold, and thanks to rising demand for platinum and similar metals, combined with increasing shortages, prices have soared. As platinum mines become exhausted, half the metal used worldwide is already recycled.

Magpie's technology can also be used to leach out harmful metals such as lead, mercury, cobalt, copper and uranium.

"Obviously the amounts are much bigger. The problem is that nobody wants to pay for something that has no value," said Almoric.

Tougher environmental standards, which would further tighten the rules of waste recovery for businesses, could add further strength to the Magpie model.

The young start-up has already taken on six staff and hopes for a turnover of a nearly a million euros next year and 15 million euros in four years' time. It has just raised half a million euros from the Fonds Lorraine des Materiaux (51-percent owned by the Caisse des Depots-Region Lorraine, 49 percent by ArcelorMittal).

Magpie does not give the names of its chief clients but is already present in "France, England, Belgium and Switzerland" and soon in Germany and Spain.

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User comments : 7

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FMA
1 / 5 (1) Oct 29, 2012
I did that for many years, but I don't make that six figure money!! Poor me :(
BloodSpill
not rated yet Oct 29, 2012
Tiny plastic pellets in water? Yeah, they attract all kinds of heavy metals. The exact same thing is happening in our oceans.
lbentil
not rated yet Oct 29, 2012
It is indeed reaching the time where recycling methods are taken more seriously, how much are we wasting and how much of that waste can be recovered?
antialias_physorg
not rated yet Oct 29, 2012
At current gold prices that may even be economical. A lot of people have tried this before but it was never worth it. If they can make it work then good for them.

However, if it does work I'm predicting a lot of copycat enterprises around the world. And seeing as the gold content of the oceans is enormous that should quickly devalue gold (i.e. make the entire process less worthwhile)
PPihkala
not rated yet Oct 29, 2012
Antialias: Water is not really their source for precious metals. Their source is waste streams from scrapping industrial waste, like printed circuit boards, catalythic converters etc.
tadchem
not rated yet Oct 29, 2012
An ion exchange resin with ligands attuned especially to Group IB and VIIIB ions...?
It should work well as long as cyanide poisoning of the feedstock has not occurred.
unknownorgin
not rated yet Oct 31, 2012
There are a small number of people who experiment with recovering gold from water and other sources and over thirty years ago they had success recovering gold with catonic (negetive charge) resins from stream and river water as well as tap water. Metal ions carry a positive charge.

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