Environmental risks of ZnO nanoparticle exposure on Microcystis aeruginosa: Toxic effects and environmental feedback

Aquatic Toxicology
Yulin TangShengji Xia

Abstract

The vast majority of studies measure the toxic effect of organisms exposed to nanoparticles (NPs) while there is still a lack of knowledge about the influence of NPs on the aquatic environment. It is unknown whether or not the interaction between NPs and algae will result in the variation of algal organic matter (AOM) and stimulate the production of more algal toxins. In this study, zinc oxide nanoparticles (nano-ZnO) as a typical representative of metal oxide NPs were used to evaluate the toxic effects and environmental feedback of Microcystis aeruginosa. Reactive oxygen species (ROS) and malondialdehyde (MDA) were measured to explain the toxicity mechanism. Changes of AOM, including the production of toxins, the molecular weight distribution and the excitation-emission matrices of algal solution were also studied as environmental feedback indicators after nano-ZnO destroyed the algae. As the nano-ZnO exceeded the comparable critical concentration (1.0 mg/L), the algae were destroyed and intracellular organic matters were released into the aquatic environment, which stimulated the generation of microcystin-LR (MC-LR). However, it is worth noting that the concentration of nano-ZnO would need to be high (at mg/L range) to stimul...Continue Reading

Citations

Sep 6, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Patrick Amoatey, Mahad Said Baawain
Oct 7, 2019·Bulletin of Environmental Contamination and Toxicology·Jingjing DuYanna Lv
Jan 8, 2021·Environmental Science and Pollution Research International·Michael Engda AsgodomJinming Kong
Apr 20, 2021·Toxicology Reports·Pallavi Saxena Harish
Jan 12, 2022·Environmental Science and Pollution Research International·Sanaz FeiziAli Movafeghi

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