Bactericidal activity of iodine-containing nanothermits
An important problem is the spread of viral aerosols and bacterial spores, the danger of which has been shown by the coronavirus pandemic. The biological hazard of such aerosols is beyond doubt, and the methods of combating them are still not effective enough. Halogen-containing reactive materials can be used to mitigate the spread of dangerous microorganisms. Iodine vapor is one of the most effective means for air disinfection in areas of high risk of infection. Their activity is manifested in the fact that iodine is able to destroy the bonds that hold proteins together in the cell and inhibit protein synthesis. To deactivate biogenic agents, we use a nanostructured thermite mixture based on aluminum nanoparticles, metal oxide (calcium, manganese or iron) and containing an iodine preparation. The novelty of the work lies in the use of metal nanoparticles, since an increase in the dispersion of thermite powder particles leads to an increase in the combustion rate and an increase in the reactivity of the material. The aim of the work is to find the optimal composition of iodine-containing nanothermite, which has the highest microbicidal activity. We conducted a series of experiments to study the microbicidal activity of iodine-containing thermite systems in relation to the B-11948 strain of lactobacilli. A sample of the thermite mixture was burned in the volume of the experimental chamber with the formation of iodine vapor. After exposure in the chamber, lactobacilli were cultivated for 48 hours. We assessed microbicidal activity by counting colonies on a microbiological counter. We found that samples with iodoform (CHI3) content of more than 30% have high microbicidal activity (more than 50 %). Microbicidal activity also depends on the composition of the nanothermite. The compositions with CuO-Al create the best iodine cloud. Thermite mixtures based on iron oxide showed the least microbicidal activity; in addition, such thermite mixtures did not always ignite. In the future, we plan to continue work on improving the compositions of nanothermite iodine-containing mixtures to neutralize infectious aerosols in the air. The authors declare no conflicts of interests.
Keywords
nanothermite,
microbicidal activity,
iodineAuthors
| Gaenko Olga I. | Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences | yuu-95@mail.ru |
| Muravlev Eugene V. | Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences | evvimv@gmail.com |
| Konyukhov Ilya E. | Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences | ilyakon008@gmail.com |
| Titov Sergey S. | Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences | titov.sergey.s@gmail.com |
| Klimenko Victor A. | Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences | klimenko@siberia.design.ru |
| Kudryashova Olga B. | Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences; Tomsk State University | olgakudr@inbox.ru |
Всего: 6
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