As a rule, during severe heavy rains, water is either absorbed into the ground or goes into the sewage system. But it could well be used as
Source of drinking water —Especially in the arid regions Pasha Planet.
The team of researchers of the University of California in Berkeley developed a water filter consisting of ordinary sand mixed with two types of natural manganese. Interacting with each other, these ingredients turn into a manganese oxide (mno2) harmless to humans.
Water contaminated with herbicides, pesticides or plastic chemicals – bisphenol, passing through such a sand filter, reacts with manganese oxide. Harmful chemicals are “binded”, leaving water on “freedom”. Moreover, they are crushed into small, less toxic chemical fragments, which during the secondary cleaning are easily subjected to biological decomposition.
Naturally, in the process of repeated use, the effectiveness of the filter is reduced, but it can be “reloaded”, thoroughly washing with technical water. According to calculations, a half -meter layer of sand can be updated by passing water through it with chlorine content 25: 1,000,000 for two days.
According to scientists, in the future, the sand filter can be placed above the aquifer for cleaning storm drains. In the meantime, they intend to try out new technology on rainwater from a stream in Sonoma (USA).
Source — University of California Berkeley