Title : The acute toxicity of tin dioxide nanoparticles on scenedesmus dimorphus and chlorella vulgaris algae
Abstract:
Nowadays, nanotechnology and the use of its components, i.e. nanoparticles, have successfully improved the situation of industries in advancing production goals. Among these nanoparticles, SnO2 or tin dioxide nanoparticle, which was used in this study, can be mentioned. Tin dioxide is used in the manufacture of batteries and fuel cells, capacitors and catalysts, and it is possible that through the entry of factory effluents into rivers and other water resources, the health of living organisms will be affected subject to negative influences. In this study, the biotoxicity of nanotin oxide on Chlorella vulgaris and Scenedesmus dimorphus algae, which are the primary producers and most important levels of the food chain was investigated. This research was conducted by the OECD acute toxicity test method (counting method for algae, method 201) and statistical probit analysis was performed in order to obtain toxicity data using the probit method. The results of exposure for Scenedesmus sp in 48 and 72 hours, were EC50 and EC90 equal to 30.2 x 103, 1.84 x 1014 and 2.42 and 71.87 x 105 mg/liter, respectively and for Chlorella sp algae this values were 6.99, 57.54 and 13.08 and 1.07 x 1010mg/liter, respectively. It is concluded that Chlorella sp is more sensitive than Scenedesmus sp. During the test period, no morphological changes were observed for any of the two microorganisms, which are based on the toxicity of tin nano oxide, and on the other hand, for both algae, especially Scenedesmus, normal proliferation and growth were observed during the period of exposure to nanoparticles.
Audience take away:
The results of this study helps to people who use these nanoparticles in industries. Other researchers can do similar studies on other aquatic species and obtain toxicity range of this material for different organisms.
