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Scientists use dairy waste to extract 22-carat gold from motherboards and other e-waste
Recently, scientists developed a sponge created from a waste product of cheesemaking capable of absorbing metals from electronic waste. The study published in the January edition of...
Although less environmentally harmful than e-waste, diaries dispose of well over 100 million tons of whey annually, according to the National Institute of Health. If the electronics recycling industry adopted this method of gold extraction, dairies could potentially sell their waste whey instead of paying to dispose of it. "The fact I love the most is that we're using a food industry byproduct to obtain gold from electronic waste ... You can't get much more sustainable than that," said Raffaele Mezzenga, ETH Zurich professor and co-author of the study.
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