Since the utbreak of severe acute respiratory syndrome (SARS) was recognized in southern China in late February 2003, a large number of chemical disinfectants have been used in the epidemic area, causing public concern about human health. and the environment.
The use of light-reinforced semiconductor minerals is an alternative to conventional chemical disinfectants (Hong He a, 2004).
The set of minerals chosen by our company have been studied over the years for their antibacterial properties ((Wei C, 1994); (Watts RJ, 1995); (Kikuchi, 1997); (Cho M, 2005); (Benabbou, 2007); (Page, 2007)) and are attributed to the generation of ROS, especially free radicals of hydroxyl (HO) and hydrogen peroxide (H2O2) (Kikuchi, 1997), as well as various experiments focused on the study of the inactivating properties of viruses (Liga & Bryant, 2011).
A study to highlight part of the Hong He study carried out with the inactivation of Coronavirus, is that of Mannekarn et al, in 2007, which showed that certain semiconductor minerals that had been irradiated with visible light (VL) inactivated rotavirus, astrovirus and feline calicivirus. (FCV). Viral concentrations were drastically reduced after exposure for 24 hours. This finding implied that the catalyst products could somehow initially interact with viral proteins in the virus inactivation process. Furthermore, he shows in his article a partial degradation of the rotaviral dsRNA genome. He also observed that, as with bacteria, reactive oxygen species such as superoxide anions (O2-) and hydroxyl radicals (· OH) were generated in a significant amount after stimulation for 8, 16 and 24 hrs. In conclusion, it establishes that the inactivation of viruses, as well as microorganisms in general, could occur through the generation of O2 and OH, followed by damage to the viral protein and the genome (Niwart Maneekarn, 2007).
After an exhaustive search for minerals with these capacities, the optimal concentrations and synergies of these, ACTIVA is manufactured, a liquid treatment for all types of installations, based on harmless, non-degradable semiconductor minerals, which in combination with a source Light (natural or artificial) permanently eliminates any type of virus, bacteria or fungus. ACTIVA likewise, contains components to guarantee the adhesion of these minerals and provide a treatment durability of approximately three years.
Benabbou, A. D. (2007). Photocatalytic inactivation of Escherichia coli- effect of concentration of TiO2 and microorganism, nature and intensity of UV irradiation. Applied Catalysis B-Environmental 76 (3-4), 257-263.
Cho M, C. H. (2005). Different inactivation behaviors of ms-2 phage and Escherichia coli in TiO2 photocatalytic disinfection. . Appl Environ Microbiol 71 (1), 270-275.
Hong He a, *. X. (2004). Catalytic inactivation of SARS coronavirus, Escherichia coli. Elsevier, 170-172.
Kikuchi, Y. S. (1997). Photocatalytic bactericidal effect of TiO2 thin films: dynamic view of the active oxygen species responsible for the effect. Journal of Photochemistry and Photobiology A: Chemistry 106, 51-56.
Liga, M. V., & Bryant, E. (2011). Virus inactivation by silver doped titanium dioxide nanoparticles for drinking water treatment. Elsevier, 535-544.
Niwart Maneekarn, W. E. (2007). Photocatalytic inactivation for diarrheal viruses by visible-light- catalytic titamium oxide. Clin. Lab., 413-421.
Page, K. P. (2007). Titania and silver Titania composite films on glass-potent antimicrobial coatings. Journal of Materials Chemistry 17 (1), 94-104.
Watts RJ, K. S. (1995). Photocatalytic inactivation of coliform bacteria and viruses in secondary wastewater effluent. Water Res 29 (1), 95-100.
Wei C, L. W. (1994). Bactericidal activity of TiO2 photocatalyst in aqueous media: toward