澳门新永利官方网址:Ultrasonic micro-explosions can harvest gold from old SIM cards

 作者:庞帻     |      日期:2019-03-14 01:20:00
Cludio Policarpo/EyeEm/Getty By Andy Coghlan There’s gold in them thar SIM cards, but most of it gets thrown away. In 2016 alone, discarding electronics wasted gold worth a reported $22.2 billion. Currently only 20 per cent of e-waste is recycled, but that could get a boost thanks to a cheap way of chipping the gold off SIM card surfaces with ultrasound. Dale Huber of Sandia National Laboratories in Albuquerque, New Mexico,