Kinetic Aspects of the Interactions between TiO2 Nanoparticles, Mercury and the Green Alga Chlamydomonas reinhardtii

Article Article scientifique Article Kinetic Aspects of the Interactions between TiO2 Nanoparticles, Mercury and the Green Alga Chlamydomonas reinhardtii eng 2022-03-26 2022-03-26 author Li Mengting 779819 author Slaveykova Vera 0000-0002-8361-2509 510054 44 10.3390/environments9040044 2076-3298 https://www.mdpi.com/2076-3298/9/4/44 Aquatic organisms are exposed to mixtures of environmental pollutants, including engineered nanoparticles; however, the interactions underlying cocktails’ effects are poorly understood, in particular, the kinetic aspects. The present study explored the time course of the interactions between nano-sized titanium dioxide (nTiO2) with different primary particle sizes, algae and inorganic mercury (Hg) over 96 h under conditions that were representative of a highly contaminated environment. The results showed that nTiO2 with smaller primary particle size and higher concentrations rapidly reduced the adsorption and internalization of mercury by green alga Chlamydomonas reinhardtii. Such a mitigating effect on mercury bioavailability could be explained by the strong adsorbing capacity of nTiO2 for Hg and the aggregation and sedimentation of nTiO2 and bound Hg. The present study highlighted the key processes determining the bioavailability of mercury to the algae in mixture exposure under conditions representative of a highly contaminated environment, such as industrial wastewater effluents. Nanoparticles Mercury Phytoplankton Bioavailability Mixture toxicity Dewey 550 Dewey 333.7-333.9 e China Scholarship Council [2016]3100 Swiss National Science Foundation Bioavailability of Mercury Species to Phytoplankton (BioMer) 200021_166089 CH Project funding 18 Institut des sciences de l'environnement 0DB 41 Département F.-A. Forel des sciences de l'environnement et de l'eau 153 false 938 ISE Pôle Sciences 752 Environmental Biogeochemistry and Ecotoxicology 944 ISE Eau Environments 9 4 10f5dec7-52e3-4d32-a371-daa0f040abbc Article (Published version) Public Article-scientifique-from-unpaywall.pdf 1737426 application/pdf CC BY openAccess Centres et instituts / Institut des sciences de l'environnement Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau

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Kinetic Aspects of the Interactions between TiO₂Nanoparticles, Mercury and the Green Alga Chlamydomonas reinhardtii	Environments			2022	196	200

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Li, Mengting