As a result of the accident at the Fukushima nuclear power plant, millions of liters of radioactive water have accumulated, which is not clear what to do. American and Russian scientists from the Texas and Kazan Federal Universities, headed by Professors James Tour and Ayrat Dimiev, proposed their own solution to the problem - carbon-based filters that purify water from radionuclides.
The filter base is a modified carbon material that is produced by treating existing carbon particles with oxidizing chemicals. This treatment significantly increases their surface area and adds an oxygen molecule to their structure. For this, two carbon-based products with a porous structure are used.
The name of one is C-seal F, which is used in oil production as an ingredient in drilling fluids, and the other is shungite, a rock that, in its composition, occupies an intermediate position between anthracite and graphite. Large deposits of shungite are found in Russia.
In laboratory tests, C-seal F has been shown to be highly effective in absorbing radioactive cesium and strontium cations from contaminated water. They became the main sources of water contamination in Fukushima.
According to scientists, water can simply be passed through C-seal F filters, after which the already purified water can be safely dumped into the ocean. The filters used will have to be burned, and the radioactive ash remaining in a small amount will be subject to special disposal.