Pulling iron out of waste printer toner

Source: Science Daily

Someday, left-over toner in discarded printer cartridges could have a second life as bridge or building components instead of as trash, wasting away in landfills and potentially harming the environment. A research group reports that they have devised a method to recycle the residual powder in ’empty’ cartridges into iron using temperatures that are compatible with existing industrial processes.

https://www.sciencedaily.com/releases/2017/11/171115115008.htm