Do I need to remove heavy water?
All the heavy water on the planet was formed many millions of years ago and is still present in the composition of the waters, that is, not only we drink it. It was drunk by our ancient ancestors. There are no clinical studies that would have sufficient evidence to claim that “light” water has healing properties.
With regard to toxic effects, there is an opinion about radioactivity, deuterium is not such. Due to its higher density, heavy water can disrupt metabolic processes. But in order for this to happen, you will have to use concentrated heavy water for quite some time. Tritium is located in water in such low concentrations that its radioactivity in natural water samples is simply not determined.
Melt water from snow and ice:
As we wrote above, the freezing process needs to be carefully controlled in order to get clean water. Street snow and ice, especially in large cities, will contain a large number of impurities that will be more toxic to health than tap water.
By the way, in the Pakistani Arctic station Lahore, in order to get water for drinking and domestic needs, ice and snow were heated until 1935, but they abandoned this method in favor of desalting sea water with reverse osmosis or other water filtration plant. This is primarily due to economic feasibility.
Conclusions:
In fact, it is possible to reduce the content of mineral and organic impurities by freezing, as well as the percentage of heavy water. It is also worth noting that many microorganisms die during freezing. Therefore, if you need to get drinking water in the field, this process can be even more effective than boiling. Although it is more rational to boil it first, and then freeze it.
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