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Characterization of Chemical and Bacterial Concentrations in Floor Dust Samples in Southeast Texas Households

Author

Listed:
  • Felica R. Davis

    (Department of Environmental and Interdisciplinary Sciences, Texas Southern University, Houston, TX 77004, USA)

  • Hanan H. Ali

    (Department of Environmental and Interdisciplinary Sciences, Texas Southern University, Houston, TX 77004, USA)

  • Jason A. Rosenzweig

    (Department of Biology, Texas Southern University, Houston, TX 77004, USA)

  • Daniel Vrinceanu

    (Department of Physics, Texas Southern University, Houston, TX 77004, USA)

  • Balaji Bhaskar Maruthi Sridhar

    (Department of Earth and Environment, Florida International University, Miami, FL 33199, USA)

Abstract

Indoor dust can be a major source of heavy metals, nutrients, and bacterial contamination in residential environments and may cause serious health problems. The goal of this research is to characterize chemical and bacterial contaminants of indoor, settled house dust in the Houston Metropolitan region. To achieve this, a total of 31 indoor dust samples were collected, along with household survey data, which were subsequently analyzed for elemental and bacterial concentrations. Microscopic and geospatial analysis was conducted to characterize and map potential hotspots of contamination. Interestingly Cd, Cr, Cu, Pb, and Zn concentrations of all 31 indoor dust samples were significantly enriched and exceeded soil background concentrations. Furthermore, As, Cd, Pb, and Zn concentrations in the dust samples were significantly correlated to the enteric bacterial load concentrations. Human health assessment revealed that cancer risk values via ingestion for Cd, Cr, and Ni were greater than the acceptable range. Of our 31 dust sample isolates, three Gram-negative and 16 Gram-positive pathogenic bacteria were identified, capable of causing a wide range of diseases. Our results demonstrate that both chemical and bacterial characterization of indoor dust coupled with spatial mapping is essential to assess and monitor human and ecological health risks.

Suggested Citation

  • Felica R. Davis & Hanan H. Ali & Jason A. Rosenzweig & Daniel Vrinceanu & Balaji Bhaskar Maruthi Sridhar, 2021. "Characterization of Chemical and Bacterial Concentrations in Floor Dust Samples in Southeast Texas Households," IJERPH, MDPI, vol. 18(23), pages 1-17, November.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:23:p:12399-:d:687925
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    References listed on IDEAS

    as
    1. Jing Ge & Lee Ann Woodward & Qing X Li & Jun Wang, 2013. "Distribution, Sources and Risk Assessment of Polychlorinated Biphenyls in Soils from the Midway Atoll, North Pacific Ocean," PLOS ONE, Public Library of Science, vol. 8(8), pages 1-7, August.
    2. Jinhua Hu & Nianping Li & Yang Lv & Jing Liu & Jingchao Xie & Huibo Zhang, 2017. "Investigation on Indoor Air Pollution and Childhood Allergies in Households in Six Chinese Cities by Subjective Survey and Field Measurements," IJERPH, MDPI, vol. 14(9), pages 1-21, August.
    3. Sharif Arar & Afnan Al-Hunaiti & Mohanad H. Masad & Androniki Maragkidou & Darren Wraith & Tareq Hussein, 2019. "Elemental Contamination in Indoor Floor Dust and Its Correlation with PAHs, Fungi, and Gram+/− Bacteria," IJERPH, MDPI, vol. 16(19), pages 1-15, September.
    Full references (including those not matched with items on IDEAS)

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