Journal article
Food and Industrial Grade Titanium Dioxide Impacts Gut Microbiota
Environmental engineering science, v 34(8), pp 537-550
01 Aug 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Titanium dioxide (TiO2), frequently used in foods, coatings, pigments, and paints, accounts for a major fraction of engineered nanomaterials released from products during usage. Impacts of food and industrial grade TiO2 on the composition and phenotype of a human gut microbiota, representing an upstream anthropogenic system, were studied to elucidate systemic perturbations to the microbial community. Findings show an inhibition of an expected, natural shift in microbial composition observed during control conditions from Proteobacteria to Firmicutes phyla in the presence of both types of TiO2 particles, with food grade exposures having a greater effect. Additionally, both TiO2 exposures resulted in lower values of the colonic pH (<5) as compared to the control (>5), with food grade exposures recording the largest reduction (approximate to pH 4). Similar trends in microbial community hydrophobicity and electrophoretic mobility between baseline, food, and industrial grade exposures indicate TiO2 exposures may have little effect on microbial stability. Results of this study indicate that inherent physical and chemical properties of the two TiO2 forms may indeed produce different microbial responses, which is significant when considering environmental exposure and risk, and the design of environmental fate and toxicity studies.
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Details
- Title
- Food and Industrial Grade Titanium Dioxide Impacts Gut Microbiota
- Creators
- Travis Waller - Univ Calif Riverside, Dept Chem & Environm Engn, A237 Bourns Hall, Riverside, CA 92521 USAChen Chen - Univ Calif Riverside, Dept Chem & Environm Engn, A237 Bourns Hall, Riverside, CA 92521 USASharon L. Walker - Univ Calif Riverside, Dept Chem & Environm Engn, A237 Bourns Hall, Riverside, CA 92521 USA
- Publication Details
- Environmental engineering science, v 34(8), pp 537-550
- Publisher
- Mary Ann Liebert, Inc
- Number of pages
- 14
- Grant note
- Department of Education; US Department of Education National Science Foundation (NSF) P200A130127 / Department of Education (GAANN); US Department of Education CBET-0954130 / NSF; National Science Foundation (NSF) DBI 0830117 / UCCEIN (University of California Center for Environmental Implications of Nanotechnology) - EPA DBI 0830117 / UCCEIN (University of California Center for Environmental Implications of Nanotechnology) - NSF 1144635 / NSF IGERT: WaterSENSE-Water Social, Engineering, and Natural Sciences Engagement Program Environmental Protection Agency (EPA); United States Environmental Protection Agency
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- College of Engineering
- Web of Science ID
- WOS:000407119700001
- Scopus ID
- 2-s2.0-85020038422
- Other Identifier
- 991021229893404721
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- Web of Science research areas
- Engineering, Environmental
- Environmental Sciences