Comparative Persistence of Engineered Nanoparticles in a Complex Aquatic Ecosystem
| Autor: | Lee Ferguson, Benjamin Espinasse, Gregory V. Lowry, Mark R. Wiesner, Mathieu Therezien, Nicholas K. Geitner, Curtis J. Richardson, Ariette Schierz |
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| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category Chemistry Aquatic ecosystem Water Nanoparticle Wetland 02 engineering and technology General Chemistry Environmental exposure 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Persistence (computer science) Mesocosm Water column Environmental chemistry Nanoparticles Environmental Chemistry Ecosystem 0210 nano-technology Water Pollutants Chemical 0105 earth and related environmental sciences |
| Zdroj: | Environmental Science & Technology. 52:4072-4078 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/acs.est.7b06142 |
| Popis: | During nanoparticle environmental exposure, presence in the water column is expected to dominate long distance transport as well as initial aquatic organism exposure. Much work has been done to understand potential ecological and toxicological effects of these particles. However, little has been done to date to understand the comparative persistence of engineered particles in realistic environmental systems. Presented here is a study of the water column lifetimes of 3 different classes of nanoparticles prepared with a combination of surface chemistries in wetland mesocosms. We find that, when introduced as a single pulse, all tested nanoparticles persist in the water column for periods ranging from 36 h to 10 days. Specifically, we found a range of nanoparticle residence times in the order Ag > TiO2 > SWCNT > CeO2. We further explored the hypothesis that heteroaggregation was the primary driving factor for nanoparticle removal from the water column in all but one case, and that values of surface affinity ... |
| Databáze: | OpenAIRE |
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