Researchers have developed an environmentally friendly method for recycling and purifying metals. Using gold earrings from a pawnshop in Gothenburg and biodiesel from the nearest filling station, the ...

Chalmers University researchers develop a sustainable method for gold recycling using biodiesel. The method effectively extracts pure gold from mixed metals and is applicable to other socially ...

In a 1996 Donald Duck comic, inventor Gyro Gearloose has invented a super-machine that sorts cheap scrap and metal poured into a tube, while out of another pipe emerge gold and shiny new coins. Now, ...