Accumulation of di-2-Ethylhexyl Phthalate from Polyvinyl Chloride Flooring into Settled House Dust and the Effect on the Bacterial Community

Authors

Samantha Velazquez, University of Oregon
Chenyang Bi, Virginia Polytechnic Institute and State University
Jeff Kline, University of Oregon
Susie Nunez, University of Oregon
Richard Corsi, Portland State UniversityFollow
Ying Xu, University of Texas at Austin
Suzanne L. Ishaque, University of Oregon

Sponsor

The following grant information was disclosed by the authors: Alfred P. Sloan Foundation to the Biology and the Built Environment Center (BioBE) at the University of Oregon.

Published In

PeerJ

Document Type

Article

Publication Date

2019

Subjects

Environmental chemistry -- Organic material, Indoor aerosols -- research

Abstract

Di-2-ethylhexyl phthalate (DEHP) is a plasticizer used in consumer products and building materials, including polyvinyl chloride flooring material. DEHP adsorbs from material and leaches into soil, water, or dust and presents an exposure risk to building occupants by inhalation, ingestion, or absorption. A number of bacterial isolates are demonstrated to degrade DEHP in culture, but bacteria may be susceptible to it as well, thus this study examined the relation of DEHP to bacterial communities in dust. Polyvinyl chloride flooring was seeded with homogenized house dust and incubated for up to 14 days, and bacterial communities in dust were identified at days 1, 7, and 14 using the V3–V4 regions of the bacterial 16S rRNA gene. DEHP concentration in dust increased over time, as expected, and bacterial richness and Shannon diversity were negatively correlated with DEHP concentration. Some sequence variants of Bacillus, Corynebacterium jeddahense, Streptococcus, and Peptoniphilus were relatively more abundant at low concentrations of DEHP, while some Sphingomonas, Chryseobacterium, and a member of the Enterobacteriaceae family were relatively more abundant at higher concentrations. The built environment is known to host lower microbial diversity and biomass than natural environments, and DEHP or other chemicals indoors may contribute to this paucity.

Description

Copyright 2019 Velazquez et al. Distributed under Creative Commons CC-BY 4.0

Locate the Document

https://doi.org/10.7717/peerj.8147

DOI

10.7717/peerj.8147

Persistent Identifier

https://archives.pdx.edu/ds/psu/30701

Citation Details

Velazquez, S., Bi, C., Kline, J., Nunez, S., Corsi, R., Xu, Y., & Ishaq, S. L. (2019). Accumulation of di-2-ethylhexyl phthalate from polyvinyl chloride flooring into settled house dust and the effect on the bacterial community. PeerJ, 7, e8147.