Session

DescriptionNanomaterials are increasingly present in rivers, lakes, groundwater, and through atmospheric deposition, raising new scientific questions that span multiple spatial and temporal scales. While engineered and incidental nanomaterials can provide benefits through advanced sensing, catalysis, and environmental remediation, they may also pose risks to aquatic ecosystems, water resources, and biogeochemical cycles. Understanding these dual roles requires computational and experimental approaches capable of linking molecular-scale interactions to hydrological and Earth-system dynamics. This minisymposium brings together researchers from environmental science, computational chemistry, and materials science to discuss emerging methods for characterizing the behavior, fate, and impacts of nanomaterials in aquatic environments. A central focus is the development of multiscale modeling frameworks that integrate chemical reactivity, surface processes, aggregation and transformation pathways. . At the nanoscale, material properties such as surface chemistry, dissolution behavior, and environmental aging critically influence mobility, persistence, and ecological effects.