Selective pressure of PFOA on microbial community: Enrichment of denitrifiers harboring ARGs and the transfer of ferric-electrons

Chen, Congli; Fang, Yuanping; Zhou, Dandan

doi:10.1016/j.watres.2023.119813

Cited by 37 publications

(3 citation statements)

References 47 publications

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“…Actinobacteria were also dominant phyla in TP, but their proportions in TP100 and TP1000 were much lower. The significantly higher relative abundance of Proteobacteria under the existence of PFOA was consistent with previous reports. , The reason was that the phospholipid bilayer in Proteobacteria readily interacted with PFOA, making Proteobacteria more sensitive to PFOA contamination and more likely to elicit response behavior …”

Section: Resultsmentioning

confidence: 99%

“…9,16 The reason was that the phospholipid bilayer in Proteobacteria readily interacted with PFOA, making Proteobacteria more sensitive to PFOA contamination and more likely to elicit response behavior. 17 Actinobacteria were dominant phyla in TP, but their proportion in TP100 and TP1000 was low, which indicated that PFOA might inhibit the growth of Actinobacteria in UIPs. TP100 contained the highest proportion of Cyanobacteria.…”

Section: Bacteria Growth Induced By Pfoa In Uipsmentioning

confidence: 99%

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PFOA Increases Microbial Risk by Promoting Iron Release and Weakening Biofilm Adhesion in Unlined Iron Drinking Water Pipes

Zhuang,

Li,

Hua

et al. 2023

ACS EST Water

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Perfluorooctanoic acid (PFOA) entering drinking water distribution system (DWDS) could induce complex processes affecting the water quality at consumer taps. Here, we first found that PFOA could greatly increase microbial risk by triggering high iron release or reducing the biofilm adhesive ability depending on the concentration levels of PFOA in unlined iron pipes. The heterotrophic plate counts (HPC) of three scenarios TP (without PFOA, control), TP100 (PFOA 100 ng/L, moderate concentration), and TP1000 (PFOA 1000 ng/L, high concentration) were 180, 692, and 192 CFU/mL, and the corresponding total iron concentrations were 0.67, 1.84, and 0.26 mg/L, respectively. Obviously, PFOA enhanced iron release in TP100 but inhibited iron release in TP1000, and the highest HPC in TP100 was in accordance with its highest iron release. Notably, TP1000 had the lowest iron release, but its HPC was the second highest. The extracellular polymeric substance (EPS) composition analysis revealed that PFOA stimulated EPS production but decreased the ratios of polysaccharides/proteins and carbohydrates/proteins, indicating that the biofilm adhesion ability was reduced due to PFOA, which was accountable for the relatively higher HPC in TP1000. This study provided new insights into the water quality risks associated with PFOA in DWDS.

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Section: Resultsmentioning

confidence: 99%

Section: Bacteria Growth Induced By Pfoa In Uipsmentioning

confidence: 99%

PFOA Increases Microbial Risk by Promoting Iron Release and Weakening Biofilm Adhesion in Unlined Iron Drinking Water Pipes

Zhuang,

Li,

Hua

et al. 2023

ACS EST Water

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“…The application of solid waste to agricultural fields further intensifies the contamination of these antibiotics in runoff [8,9]. Seasonal fluctuations and urban development have a profound effect on the distribution of antibiotics in watersheds, as demonstrated by the different antibiotic resistance profiles of the local ecology [10][11][12]. The antibiotic resistance of aquatic microorganisms can reach malleable, sub-stable, or stable stages due to the continuous release of antibiotics from human activities in the watershed basin [13,14].…”

Section: Introductionmentioning

confidence: 99%

Ecological Response of Enzyme Activities in Watershed Sediments to the Reintroduction of Antibiotics

Lu,

Chen,

et al. 2024

Water

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The impact of antibiotic residue on sediment ecology at the watershed level is not yet fully understood. In this investigation, varying concentrations of oxytetracycline (OTC) and sulfadiazine (SD) were added to the overlying water of both the upper (0–10 cm) and bottom sediment (20–30 cm) layers at the watershed scale to evaluate the ecological impact on sediment habitats through the analysis of the activities of enzymes, namely urease (UA), alkaline phosphatase (APA), peroxidase (POA), and dehydrogenase (DHA). Results showed that the levels of UA and APA in the bottom sediment layers exceeded those in the top sediment layer upon reintroduction of antibiotics. Conversely, the fluctuations in DHA were notably reduced across various types of antibiotics and exposure concentrations in the bottom sediment layers. Within the top sediment layers, as the concentration of OTC exposure increased, there was a corresponding elevation in POA levels. However, the response of POA initially ascended and subsequently descended with rising SD exposure concentration, although it consistently exceeded the control levels. In contrast, the response of DHA displayed an inverse correlation with OTC exposure concentration but a direct correlation with SD exposure concentration. At the watershed scale, under antibiotic exposure, UA and DHA exhibited significantly higher levels upstream compared to downstream. Conversely, APA and POA appeared relatively stable across the watershed following the reintroduction of antibiotics. Moreover, DHA demonstrated a noticeable decreasing trend with increasing concentrations of OTC exposure. Environmental factors had a predominant influence, exceeding 40%, on enzyme activities during antibiotic reintroduction. Specifically, particle size significantly inhibited enzyme activity, while sediment nutrient conditions, including total carbon, nitrogen, and sulfur content, significantly enhanced enzyme activities. The study suggests that enzyme activities associated with antibiotic reintroduction in watershed sediments are established during stable stages in the bottom sediment layer or downstream sediment environment as part of sedimentary and transport processes. More research is required to explore the maintenance and evolution of antibiotic resistance profiles in the presence of long-term antibiotic residues.

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Biological Effects and Environmental Behaviors of Medium- and Long-Chain Chlorinated Paraffins: A Brief Review

Chen,

Cheng,

Liu

et al. 2024

Curr Pollution Rep

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Selective pressure of PFOA on microbial community: Enrichment of denitrifiers harboring ARGs and the transfer of ferric-electrons

Cited by 37 publications

References 47 publications

PFOA Increases Microbial Risk by Promoting Iron Release and Weakening Biofilm Adhesion in Unlined Iron Drinking Water Pipes

PFOA Increases Microbial Risk by Promoting Iron Release and Weakening Biofilm Adhesion in Unlined Iron Drinking Water Pipes

Ecological Response of Enzyme Activities in Watershed Sediments to the Reintroduction of Antibiotics

Biological Effects and Environmental Behaviors of Medium- and Long-Chain Chlorinated Paraffins: A Brief Review

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