Temperature dependency of virus and nanoparticle transport and retention in saturated porous media
| Autor: | Vadakattu V. S. R. Gupta, Scott A. Bradford, Saeed Torkzaban, Peter G. Cook, Salini Sasidharan |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Surface Properties Silicon dioxide 0208 environmental biotechnology Nanoparticle Nanotechnology 02 engineering and technology Surface finish 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Water Movements Zeta potential Surface roughness Environmental Chemistry Bacteriophage PRD1 Porosity Groundwater 0105 earth and related environmental sciences Water Science and Technology Osmolar Concentration Temperature Interaction energy Models Theoretical Silicon Dioxide 020801 environmental engineering Solutions Chemical engineering chemistry Ionic strength Nanoparticles Water Microbiology Bacteriophage phi X 174 |
| Zdroj: | Journal of Contaminant Hydrology. 196:10-20 |
| ISSN: | 0169-7722 |
| DOI: | 10.1016/j.jconhyd.2016.11.004 |
| Popis: | The influence of temperature on virus (PRD1 and ΦX174) and carboxyl-modified latex nanoparticle (50 and 100nm) attachment was examined in sand-packed columns under various physiochemical conditions. When the solution ionic strength (IS) equaled 10 and 30mM, the attachment rate coefficient (katt) increased up to 109% (p 50mM. An explanation for these observations was obtained from extended interaction energy calculations that considered nanoscale roughness and chemical heterogeneity on the sand surface. Interaction energy calculations demonstrated that the energy barrier to attachment in the primary minimum (∆Φa) decreased with increasing IS, chemical heterogeneity, and temperature, especially in the presence of small amounts of nanoscale roughness (e.g., roughness fraction of 0.05 and height of 20nm in the zone of influence). Temperature had a negligible effect on katt and Sf when the IS=1mM because of the large energy barrier, and at IS=50mM because of the absence of an energy barrier. Conversely, temperature had a large influence on katt and Sf when the IS was 10 and 30mM because of the presence of a small ∆Φa on sand with nanoscale roughness and a chemical (positive zeta potential) heterogeneity. This has large implications for setting parameters for the accurate modeling and transport prediction of virus and nanoparticle contaminants in ground water systems. |
| Databáze: | OpenAIRE |
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