Journal article
Comparison of filtration mechanisms of food and industrial grade TiO2 nanoparticles
Analytical and bioanalytical chemistry, v 410(24), pp 6133-6140
01 Sep 2018
PMID: 29781046
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The removal of food and industrial grade titanium dioxide (TiO2) particles through drinking water filtration was assessed via direct visualization of an in situ 2-D micromodel. The goal of this research was to determine whether variances in surface composition, aggregate size, and ionic strength result in different transport and deposition processes in porous media. Food and industrial grade TiO2 particles were characterized by measuring their hydrodynamic diameter, zeta potential, and zero point of charge before introduction into the 2-D micromodel. The removal efficiency as a function of position on the collector surface was calculated from direct visualization measurements. Notably, food grade TiO2 had a lower removal efficiency when compared with industrial grade. The difference in removal efficiency between the two particle types could be attributed to the higher stability (as indicated by the larger zeta potential values) of the food grade particles, which lead to a reduced aggregate size when compared to the industrial grade particles. This removal efficiency trend was most pronounced in the rear stagnation point, due to the high contribution of hydrodynamic forces at that point. It could be inferred from the results presented herein that particle removal strategies should be based on particle aggregate size and surface charge.
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Details
- Title
- Comparison of filtration mechanisms of food and industrial grade TiO2 nanoparticles
- Creators
- Chen Chen - University of California, RiversideIan M. Marcus - University of California, RiversideTravis Waller - University of California, RiversideSharon L. Walker - University of California, Riverside
- Publication Details
- Analytical and bioanalytical chemistry, v 410(24), pp 6133-6140
- Publisher
- Springer Nature
- Number of pages
- 8
- Grant note
- NSF IGERT: WaterSENSE-Water Social, Engineering National Science Foundation (NSF) P200A130127 / Department of Education (GAANN); US Department of Education CBET-0954130 / NSF; National Science Foundation (NSF) 1144635 / Natural Sciences Engagement Program NSF; National Science Foundation (NSF) DBI 0830117 / EPA; United States Environmental Protection Agency Environmental Protection Agency (EPA); United States Environmental Protection Agency Department of Education fund UCCEIN (University of California Center for Environmental Implications of Nanotechnology)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000443423300009
- Scopus ID
- 2-s2.0-85047151016
- Other Identifier
- 991021229981904721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Biochemical Research Methods
- Chemistry, Analytical