Stephen Messenger summarizes research on a new use for banana peels:
Banana peels, evidently, are rich in negatively charged molecules, so they attract the heavy and positively charged metal pollutants in water -- and they're quite effective, too. For every treatment with the peel powder, around 65 percent of the water was decontaminated. The process can also be repeated to purify the water almost completely.
"I started doing it at home. It's really easy," says [chemist Milena] Boniolo.