saskatoon scientists pulling gold out of e-waste

by:ZHENHUA     2020-09-02
In mobile phones, computers, tablets and other electronic devices, there is a little bit of gold on the board, and a chemistry professor at the University of the province of SA has found a way to easily remove gold.
Stephen Foley says nearly 50 million tons of electronic products are produced worldwide.
A large amount of garbage is landfill every year.
The gold recovered is only about, which means a lot of gold will be wasted.
\"Whenever you look at the circuit board, you will see . . . . . . A ceramic with a green plastic coating, as well as metal bypassing the circuit board, all of which are usually a layer of copper, on a layer of nickel, on a layer of gold, \"said welfare.
\"We selectively remove gold using concentrated vinegar. \" E-
The most wasteful criminals include the United States. S.
The United Nations reports that China currently has several places to recycle circuit boards, but they usually remove only nickel and copper.
Removing gold is not economically feasible.
But when his team in the lab was looking for a substance that selectively combined gold to other purposes, they stumbled upon a solution.
\"They are investigating concentrated vinegar as a solvent and they find that they can use this solvent and add some extra chemicals to it,\" he said: \"It\'s a very effective solvent to peel gold off the board. \".
Gold was produced in a solution in the form of oxidation, but the team added zinc to make it solid.
For chemists, welfare says, this is actually a very simple process that can be done in a few seconds.
Using this new process, it takes about $70 to peel enough boards to get a kilo of gold, and the benefit says it will be worth $45,000.
Welfare says they are aiming for gold and they want to scale up.
\"We are looking for companies that are already looking for recycling boards, or for investors to start our own company,\" he said . \".
The benefit adds that the process is not intended to be \"in the garage\" and it needs to be done on a larger scale in order to be worth it.
A study by the United Nations estimates
Waste dumped around the world in 2014 was worth $52 billion.
Canada dumped about 725,000 tons of electronic waste, the report said.
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