Multimedia Environmental Distribution of Engineered Nanomaterials
| Autor: | Haoyang Haven Liu, Yoram Cohen |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Suspended solids
Ecology Multimedia Engineered nanomaterials Environmental engineering Sediment General Chemistry Models Theoretical computer.software_genre Nanostructures Environmental chemistry Computer Graphics Environmental Chemistry Environmental science Environmental Pollutants Environmental Pollution computer Dissolution Algorithms |
| Zdroj: | Environmental Science & Technology. 48:3281-3292 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/es405132z |
| Popis: | A compartmental multimedia model was developed to enable evaluation of the dynamic environmental multimedia mass distribution and concentrations of engineered nanomaterials (ENMs). The approach considers the environment as a collection of compartments, linked via fundamental environmental intermedia transport processes. Model simulations for various environmental scenarios indicated that ENM accumulation in the sediment increased significantly with increased ENMs attachment to suspended solids in water. Atmospheric dry and wet depositions can be important pathways for ENMs input to the terrestrial environment in the absence of direct and distributed ENM release to soil. Increased ENM concentration in water due to atmospheric deposition (wet and dry) is expected as direct ENM release to water diminishes. However, for soluble ENMs dissolution can be the dominant pathway for suspended ENM removal from water even compared to advection. Mass accumulation in the multimedia environment for the evaluated ENMs (metal, metal oxides, carbon nanotubes (CNT), nanoclays) was mostly in the soil and sediment. The present modeling approach, as illustrated via different test cases, is suited for "what if" first tier analyses to assess the multimedia mass distribution of ENMs and associated potential exposure concentrations. |
| Databáze: | OpenAIRE |
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