Effect of TiO₂ Nanoparticle Aggregation on Marine Microalgae Isochrysis Galbana
TiO2 nanoparticles (NPs) could adversely impact aquatic ecosystems. However, the aggregation of these NPs could attenuate this effect. In this work, the biological effects of TiO2 NPs on a marine microalgae Isochrysis galbana were investigated. The aggregation kinetics of TiO2 NPs under different conditions was also investigated to determine and understand these effects. Results showed that, though TiO2 NPs had no obvious impact on the size and reproducibility of algal cells under testing conditions, they caused a negative effect on algal chlorophyll, which led to a reduction in photosynthesis. Furthermore, fast aggregation of TiO2 NPs occurred under all conditions, especially at the pH close to the pHzpc. Increasing ionic strength and NP concentration also enhanced the aggregation rate. The aggregation and the following sedimentation of TiO2 NPs reduced their adverse effects on I. galbana.
J. Hu et al., "Effect of TiO₂ Nanoparticle Aggregation on Marine Microalgae Isochrysis Galbana," Journal of Environmental Sciences (China), vol. 66, pp. 208-215, Chinese Academy of Sciences, Apr 2018.
The definitive version is available at https://doi.org/10.1016/j.jes.2017.05.026
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Agglomeration; Algae; Aquatic ecosystems; Ionic strength; Microorganisms; Nanoparticles; Aggregation kinetics; Biological effects; Ecotoxicity; Isochrysis galbana; Marine microalgae; Nanoparticles (NPs); Nanoparticle aggregation; Testing conditions; Titanium dioxide; Aggregation behavior; Concentration (composition); Ecotoxicology; Microalga; Nanoparticle; pH; Pollution effect; Titanium; Algae; Isochrysis galbana; Chlorophyll; Nanoparticle; Titanium; Titanium dioxide; Haptophyta; Microalga; Osmolarity; Physiology; Toxicity; Water pollutant; Chlorophyll; Haptophyta; Microalgae; Nanoparticles; Osmolar Concentration; Titanium; Water Pollutants; Chemical; Aggregation
International Standard Serial Number (ISSN)
Article - Journal
© 2018 Chinese Academy of Sciences, All rights reserved.
01 Apr 2018