Using silver particles for water filtration is not the main innovation. Others have used this technology in the past. The key is controlling the release of nanoparticles, which can reduce the usable life of the filters. And the silver particles mix at high volume with some of the chemicals, such as chloride and sulfide, in the untreated water, leading to a “poison layer” that can reduce the disinfection efficacy of the silver particles on the clay lining.
The researchers used materials abundant in the environment of the community, including pine tree resin, to mitigate the uncontrolled release of silver particles during the water purifying process. The materials and construction process for the pots cost less than $10, making for a potentially low-cost solution.
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