Monitoring the Environmental Aging of Nanomaterials: An Opportunity for Mesocosm Testing?
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Updated: Jan 21, 2026

A Small-Scale Setup for Algal Toxicity Testing of Nanomaterials and Other Difficult Substances
Published on: October 10, 2020
Armand Masion1,2, Mélanie Auffan3,4,5, Jérôme Rose3,4,5
1CNRS, Aix Marseille Université., IRD, INRA, Coll France, CEREGE, Europole Arbois, BP 80, 13545 Aix en Provence, France. masion@cerege.fr.
Abstract:
Traditional aging protocols typically examine only the effects of a limited number of stresses, and relatively harsh conditions may trigger degradation mechanisms that are not observed in actual situations. Environmental aging is, in essence, the complex interaction of multiple mechanical, physicochemical and biological stresses. As yet, there is no (pre)standardized procedure that addresses this issue in a satisfactory manner. Mesocosm experiments can be designed to specifically cover the aging of nanomaterials while characterizing the associated exposure and hazard. The scenario of exposure and the life time of the nanomaterial appear as the predominant factors in the design of the experiment, and appropriate precautions need to be taken. This should the subject of guidance that may be divided into product/application categories.
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