Nanoparticles (NPs) exist in atmosphere, ores, rocks, ocean, hydrothermal vents, river, and wastewater. The presentation will first summarize the examples of presence of different nanoparticles and their oxides/sulfides forms in different compartments of aquatic environment. The focus of the presentation will be on silver nanoparticles (AgNPs) to demonstrate their formation under different environmental conditions such as temperature, pH, and source of natural organic matters (NOMs). The influence of natural sunlight and types of NOMs (e.g., fulvic acid and humic acid) will also be discussed. Approaches used in elucidating the mechanism of the formation of AgNPs will be discussed. Formed AgNPs from NOMs are highly stable up to several months. Recent research on the potential interactions of AgNPs with metals, metal oxides, and carbon-based nanomaterials under natural environment will be shown. Finally, current understanding of the toxicity of naturally formed AgNPs will be presented.

Mechanism of formation, stability, and toxicity of silver nanoparticles in aquatic environment

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.