Titanium dioxide nanoparticles (TiO₂ NPs) present a high interest as an excellent antibacterial agent against pathogenic microorganisms. Currently, the massive proliferation of potentially toxic cyanobacteria in the water of dams presents a threat to the public health of these water consumers. This study was maintained to evaluate the antibacterial activity of TiO₂ NPs against the cyanobacteria « Microcystis sp.» responsible for toxic blooms in the freshwater reservoirs intended for drinking water production. Three concentrations of TiO₂ NPs (150 mg.l-1¸ 300 mg.l-1 and 600 mg.l-1) were tested in the laboratory on two strains of Microcystis sp. (S1¸ S2) over a period of eight days. In parallel, three biotic variables were measured: Microcystis sp. cells density (cell.ml-1), Chlorophyll (a) (µg.l-1), and Phycocyanin (µg.l-1) content every 48 hours all along the experimental period. A remarkable decrease in cell densities was registered, recording decreased values from 77490 to 39091 cell.ml-1 for S1 and from 2801 to 0 cell.ml-1 for S2 with the concentration of 600 mg.l-1. Additionally, the chlorophyll (a) content fell from 45 to 8 µg.l-1 for S1, and from 34 to 0 µg.l-1 for S2. Similarly, treatment with TiO₂ NPs caused the degradation of phycocyanin from 200 to 65 µg.l-1 for S1 and from 200 to 0 µg.l-1 for S2 with the highest concentration of these nanoparticles (600 mg.l-1). TiO₂ NPs exhibit a very important antibacterial effect against Microcystis. sp. Thus, TiO₂ NPs can be used in the future to reduce the high biomasses of cyanobacteria during the process of tap water production.
Boutarfa et al., K. (2021). The Effect of Titanium Dioxide Nanoparticles Against Cyanobacterial Microorganisms. Egyptian Journal of Aquatic Biology and Fisheries, 25(3), 13-21. doi: 10.21608/ejabf.2021.172130
MLA
Karima Boutarfa et al.. "The Effect of Titanium Dioxide Nanoparticles Against Cyanobacterial Microorganisms", Egyptian Journal of Aquatic Biology and Fisheries, 25, 3, 2021, 13-21. doi: 10.21608/ejabf.2021.172130
HARVARD
Boutarfa et al., K. (2021). 'The Effect of Titanium Dioxide Nanoparticles Against Cyanobacterial Microorganisms', Egyptian Journal of Aquatic Biology and Fisheries, 25(3), pp. 13-21. doi: 10.21608/ejabf.2021.172130
VANCOUVER
Boutarfa et al., K. The Effect of Titanium Dioxide Nanoparticles Against Cyanobacterial Microorganisms. Egyptian Journal of Aquatic Biology and Fisheries, 2021; 25(3): 13-21. doi: 10.21608/ejabf.2021.172130