Background and Objectives: In recent years, with the growing growth of chemicals based on nanotechnology, on the one hand, and on the other hand, special capabilities such as photolysis in nanomaterials, which will cause the destruction and elimination of organic pollutants, we have witnessed the entry of these materials into the environment. Different waters are like wetlands. In this research, considering the widespread use of titanium dioxide nanomaterials to remove organic sediments of Anzali lagoon in the past years, by creating the simulated conditions of that lagoon on a laboratory scale, the hematological test of the carp species (Ctenopharyngodon Idella),in contact with Titanium dioxide nanoparticles were used to investigate the toxicological effects of this substance in the aquatic environment.
Methods:The average lethal concentration LC50 for Amur species was calculated and the daily mortality rate was determined and recorded by Spss analysis. The fish were chronically exposed to TiO2 nanoparticles for 2 weeks in the treatments of 0.1, 0.1, 1, and 10 ppm. After 14 days, blood samples were taken from the fish and blood samples were analyzed to analyze the blood parameters.
Findings: By examining the blood parameters of RBC, Hb, HCT, MCV, WBC, MCH and MCHC, there were significant differences, including a decrease in the first three cases (P<0.05) and an increase in the last three cases (P>0 /05), was observed among different treatments and the control group.The lethal concentration (LC50) for Amur species was also 12834 ppm.
Conclusion:Nanomaterials of titanium dioxide in the examined concentrations have a negative effect on the hematological factors of Amur fish and cause a decrease in red blood cells, hemoglobin and hematocrit in the blood of Amur fish, which ultimately leads to the death of this species of fish. Therefore, this fish can be a suitable indicator for the toxicology evaluation of titanium dioxide nanoparticles. |
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