Toxic effect of nano and bulk TiO2 on growth, chlorophyll a content and oxidative stress of marine diatom Chaetoceros muelleri
Maedeh Baharlooeian, Mohideen Abdul Badhul Haq
Abstract. Nanoparticles are widely used in many applications. The recent increase in nanomaterials usage has led to raising concerns about its health risks and environmental impact. In this study, we examined the toxicity effects of nanoparticles TiO2 and bulk Ti on marine diatom chatetoceros muelleri. We treated microalgae with equal amounts of nano and bulk TiO2 in different concentrations include 0, 10, 50, 100, 200 and 300 ppm, then was investigated their growth in 96 h. Observations demonstrated growth inhibition in 50 mg/L from first exposure day for nano and bulk TiO2. Furthermore, the chlorophyll a content strongly decreased in nano and bulk in TiO2 in different days rather than control, respectively. As well as, results showed that, antioxidant values in nano-treated samples were higher than bulk in comparison control. In addition, we found that nano was more toxic than bulk. We aimed, indicating critical impacts of nTiO2 on the ecosystem.
Keywords: nano TiO2; bulk Ti; chlorophyll a content; growth inhibition; ROS production
Cite in Nipponpub style:
Baharlooeian, M., Haq, M.A.B. (2020). Toxic effect of nano and bulk TiO2 on growth, chlorophyll a content and oxidative stress of marine diatom Chaetoceros muelleri. Nipp. J. Environ. Sci., 1(1), 1001. https://doi.org/10.46266/njes.1001