1. Peels from Bananas
Minced banana peel can remove lead and copper from water.
Take a look at this study that shows how the peels from bananas can be used repeatedly for water purification.
Researchers determined that the process works because of the chemical composure of the banana peel.
Nitrogen and sulfur atoms as well as carboxylic acids draw metals that have a positive charge out of water.
The study was intended to find low cost ways to purify runoff from mining sites, industrial waste areas and farms.
2. Apple Peels and Tomato Peels
Researchers at the National University of Singapore discovered the pollutant absorbing ability of apple and tomato peels while looking for ways that rural villages could clean contaminated water.
The peels of both apples and tomatoes effectively removed heavy metals from water.