Alex Howard

A Study Into Making and Using Carbon-Coated Sea Shells for the Filtration of Lead-Contaminated Water

Alex Howard, USA Community Impact Award, 13-15

I wanted to find a way to make an affordable, carbon-coated material for filtering out contaminants in water. By coating oyster shells in sugar then heat treating it, a layer of carbon on the surface was easily and cheaply made. Its ability to filter out heavy metals like lead was far superior to regular filters. Carbon-coated shells have the potential not only for water purification in sewage treatment plants, but could be easily made and distributed for those who are without a safe, clean water supply.