toxic effect ofaluminum oxidenanoparticles on greenmicro-algae dunaliella salina

aluminum oxide nanoparticles are the most widely used nanoparticles in various industries.theincreasing use of nanoparticles in the past two decades and their entry into the industrial and non-industrialwaste water necessitates the assessment of potential effects of these substances in aquatic ecosystems. oecdstandard method was applied to determine the toxicity of this substance. after performing the detection rangetesting, the cells of 7 treatments and 2 controls were counted every 24 hours for 72 hours in three replicates foreach concentration. after extraction, chlorophyll a and carotenoid were measured using spectrophotometry.scanning electron microscopy (sem) was used to image the exposure of the algae cells to nanoparticles. the72-hour levels of ec10, ec50, ec90, and noec, specific growth rate (μ), doubling time (g), and percentinhibition (i%) were also calculated. the obtained 72-hour levels were ec10=1.6610-3, ec50=0.162, ec90=15.31,and noec=16.2×10-2mg/l. the control and treatment algae had a significant difference in terms of cell densityand growth inhibition rate (p