A team of researchers from the University of Genoa and the Italian Institute of Technology have come up way to make the most out of old coffee grounds. The combines these grounds with silicone to create foam capable of removing harmful lead and mercury from water.
Lead water remains in the forefront after the crisis in Flint. This foam, infused with the abundance of coffee grounds produced by the world, seems to be very effective in handling the lead:
Despina Fragouli and her colleagues at the University of Genoa and the Italian Institute of Technology developed a process that combines the grounds with silicone to form a porous foam (basically a sponge) that can be dropped into water. The small filter pulled out 99 percent of lead and mercury ions in about 4 teaspoons of still water after 30 hours.