Wastewater treatment alters microbial colonization of microplastics.
Acinetobacter
/ drug effects
Bacteria
/ drug effects
Campylobacteraceae
/ drug effects
DNA, Bacterial
/ chemistry
Klebsiella
/ genetics
Microplastics
/ analysis
Polymers
/ chemistry
Pseudomonas
/ genetics
Sequence Analysis, DNA
Sewage
/ microbiology
Waste Disposal, Fluid
Water Pollutants, Chemical
/ analysis
Xanthomonas
/ drug effects
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2021
2021
Historique:
received:
17
06
2020
accepted:
09
12
2020
entrez:
6
1
2021
pubmed:
7
1
2021
medline:
24
4
2021
Statut:
epublish
Résumé
Microplastics are ubiquitous contaminants in aquatic habitats globally, and wastewater treatment plants (WWTPs) are point sources of microplastics. Within aquatic habitats microplastics are colonized by microbial biofilms, which can include pathogenic taxa and taxa associated with plastic breakdown. Microplastics enter WWTPs in sewage and exit in sludge or effluent, but the role that WWTPs play in establishing or modifying microplastic bacterial assemblages is unknown. We analyzed microplastics and associated biofilms in raw sewage, effluent water, and sludge from two WWTPs. Both plants retained >99% of influent microplastics in sludge, and sludge microplastics showed higher bacterial species richness and higher abundance of taxa associated with bioflocculation (e.g. Xanthomonas) than influent microplastics, suggesting that colonization of microplastics within the WWTP may play a role in retention. Microplastics in WWTP effluent included significantly lower abundances of some potentially pathogenic bacterial taxa (e.g. Campylobacteraceae) compared to influent microplastics; however, other potentially pathogenic taxa (e.g. Acinetobacter) remained abundant on effluent microplastics, and several taxa linked to plastic breakdown (e.g. Klebsiella, Pseudomonas, and Sphingomonas) were significantly more abundant on effluent compared to influent microplastics. These results indicate that diverse bacterial assemblages colonize microplastics within sewage and that WWTPs can play a significant role in modifying the microplastic-associated assemblages, which may affect the fate of microplastics within the WWTPs and the environment.
Identifiants
pubmed: 33406095
doi: 10.1371/journal.pone.0244443
pii: PONE-D-20-18625
pmc: PMC7787475
doi:
Substances chimiques
DNA, Bacterial
0
Microplastics
0
Polymers
0
Sewage
0
Water Pollutants, Chemical
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0244443Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
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