Getting the metals out of old phones

https://www.chemistryworld.com/feature/smartphone-recycling/2500497.article

There’s gold, platinum and other valuable materials in every phone – the hard part is getting it out.

http://www.bbc.com/future/story/20161017-your-old-phone-is-full-of-precious-metals

Your old phone or electric toothbrush could end up as a part in a 3D printer or piece of artwork, says Jonathan Kalan.

http://www.bbc.com/future/story/20140218-why-your-old-tech-holds-treasure