Between 2017 and 2019, people across Japan donated 6.21 million used phones and nearly 79,000 tonnes of small electronic devices. Recyclers recovered about 32 kilograms of gold, 3,500 kilograms of silver and 2,200 kilograms of bronze from the haul—e

Recyclers extracted significant amounts of precious metals from donated devices. Gold, silver, and bronze were among the materials recovered. The total amount of gold extracted was around 32 kilograms, while silver and bronze weighed approximately 3,500 kilograms and 2,200 kilograms, respectively.

These metals were obtained from a large collection of used electronics. The devices, which included phones, were donated over a period of two years.

Further information about this collection and recycling effort is available from the source, ScienceBlog.com.