RT Journal Article
T1 Adverse effects of iron-based nanoparticles on freshwater phytoplankton Scenedesmus armatus and Microcystis aeruginosa strains
A1 D'Ors De Blas, Ana
A1 Sánchez Fortún, A.
A1 Cortés Téllez, A. A.
A1 Fajardo, C.
A1 Mengs, G.
A1 Nande Barbeitos, María Del Mar
A1 Martín, C.
A1 Costa Buitrago, Gonzalo Antonio
A1 Martín, M.
A1 Bartolomé, M. C.
A1 Sánchez-Fortún Rodríguez, Sebastián
AB Zero-valent nano-iron particles (nZVI) are increasingly present in freshwater aquatic environments due to their numerous applications in environmental remediation. However, despite the broad benefits associated with the use and development of nZVI nanoparticles, the potential risks of introducing them into the aquatic environment need to be considered. Special attention should be focused on primary producer organisms, the basal trophic level, whose impact affects the rest of the food web. Although there are numerous acute studies on the acute effects of these nanoparticles on photosynthetic primary producers, few studies focus on long-term exposures. The present study aimed at assessing the effects of nZVI on growth rate, photosynthesis activity, and reactive oxygen activity (ROS) on the freshwater green algae Scenedesmus armatus and the cyanobacteria Microcystis aeruginosa. Moreover, microcystin production was also evaluated. These parameters were assessed on both organisms singly exposed to 72 h-effective nZVI concentration for 10% maximal response for 28 days. The results showed that the cell growth rate of S. armatus was initially significantly altered and progressively reached control-like values at 28 days post-exposure, while M. aeruginosa did not show any significant difference concerning control values at any time. In both strains dark respiration (R) increased, unlike net photosynthesis (Pn), while gross photosynthesis (Pg) only slightly increased at 7 days of exposure and then became equal to control values at 28 days of exposure. The nZVI nanoparticles generated ROS progressively during the 28 days of exposure in both strains, although their formation was significantly higher on green algae than on cyanobacteria. These data can provide additional information to further investigate the potential risks of nZVI and ultimately help decision-makers make better informed decisions regarding the use of nZVI for environmental remediation.
PB Elsevier
SN 0045-6535
YR 2023
FD 2023-07-31
LK https://hdl.handle.net/20.500.14352/104370
UL https://hdl.handle.net/20.500.14352/104370
LA eng
NO D'ors, A., Sánchez-Fortún, A., Cortés-Téllez, A. A., Fajardo, C., Mengs, G., Nande, M., Martín, C., Costa, G., Martín, M., Bartolomé, M. C., & Sánchez-Fortún, S. (2023). Adverse effects of iron-based nanoparticles on freshwater phytoplankton Scenedesmus armatus and Microcystis aeruginosa strains. Chemosphere, 339, 139710. https://doi.org/10.1016/j.chemosphere.2023.139710
NO 2023 Acuerdos transformativos CRUE
NO Ministerio de Ciencia, Innovación y Universidades (España)
DS Docta Complutense
RD 2 oct 2024