The Novosibirsk State Technical University (NSTU) has developed an innovative water purifier based on chitosan, a substance derived from crab shells. This was reported by the university's press service.
We selected two types of biogels based on modified chitosan, and we tested them: we took water from an ordinary puddle, purified it, and sent it for analysis. The water showed compliance with SanPiN standards, that is, suitability for drinking.
The water purifier is a bag with a biogel that has a mesh structure, resembling a tea bag. It consists of a layer of carbon filter, one type of gel, a carbon layer, a second type of gel, and another carbon layer.
The bag is placed inside a filter cartridge on the neck of the bottle and closed with a lid, which is modified to fit the size of the neck using additional modules. One bag is designed to purify 5 liters of water.
Earlier, www1.ru reported that in Russia they created a membrane for cleaning used motor oils.
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