Dataset Information

Data on occurrence of perfluoroalkyl substances in influents and effluents collected from different wastewater treatment plants in Latvia.

ABSTRACT: The data set provided in this paper contains occurrence data of 17 perfluoroalkyl substances (PFAS) (including 10 perfluorinated carboxylic acids and 7 perfluorinated sulfonic acids) in influent and effluent samples collected from 43 wastewater treatment plants (WWTPs) located in different cities in Latvia. Samples were collected in the period June-July 2021. In each WWTP one influent and one effluent sample were collected on the same day. Extraction and clean-up of the samples were performed using solid phase extraction (SPE) on a weak-anion SPE phase. Observed extracts were analysed using high performance liquid chromatography coupled with Orbitrap high resolution mass spectrometry (HPLC-Orbitrap-MS) on the content of selected PFAS representatives. The collected data are with fundamental scientific value and can be applied for local data analysis. The data set is useful for the estimation of overall background levels of PFAS and evaluation of local city WWTPs wastewater remediation efficiency towards the removal of PFAS contamination.

SUBMITTER: Zacs D

PROVIDER: S-EPMC9092855 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature

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Data on occurrence of perfluoroalkyl substances in influents and effluents collected from different wastewater treatment plants in Latvia.

Zacs Dzintars D Pasecnaja Elina E Bartkevics Vadims V

Data in brief 20220429

The data set provided in this paper contains occurrence data of 17 perfluoroalkyl substances (PFAS) (including 10 perfluorinated carboxylic acids and 7 perfluorinated sulfonic acids) in influent and effluent samples collected from 43 wastewater treatment plants (WWTPs) located in different cities in Latvia. Samples were collected in the period June-July 2021. In each WWTP one influent and one effluent sample were collected on the same day. Extraction and clean-up of the samples were performed us ...[more]

PMID: 35572800

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Project description:Clostridium perfringens is classified into types A to G, and all types produce alpha-toxins; however, C. perfringens type F that is negative for phospholipase C (PLC) activity of alpha-toxin has been isolated from the environment and cases of humans afflicted by food poisoning. This study aimed to elucidate the distribution of PLC-negative C. perfringens type F in sewage influents and effluents. Influents and effluents of two wastewater treatment plants were collected monthly between July 2016 and January 2020 and between August 2018 and January 2020, respectively. Isolation rates of PLC-negative C. perfringens type F from sewage influents and effluents were 38% (33/86) and 22% (8/36), and the numbers of isolates were 43 and 13, respectively. The locus of the enterotoxin gene of all isolates was determined to be in a plasmid with an IS1151 sequence, and multilocus sequence typing revealed that all 17 representative isolates were assigned as sequence type 186. Sequencing of the plc gene of these representative isolates showed that nonsense mutation (p.W98*) causing alpha-toxin deficiency should be responsible for a loss of PLC enzymatic activity. These results suggest that alpha toxin-deficient C. perfringens type F is distributed in living and water environments since sewage influents contain community wastewater, and effluents contaminate the environment. Detection of C. perfringens type F, independent of PLC activity, should be carried out on human and environmental samples. IMPORTANCE Understanding the diversity of biochemical characteristics that may affect the identification of bacteria is essential. C. perfringens is a ubiquitous bacterium found in the environment, humans, and animals and is responsible for infectious disease in the intestine. Although the alpha-toxin of C. perfringens may be used for its detection, variants of the alpha-toxin lacking its activity have been isolated from soil and humans experiencing symptoms of diarrhea. It is valuable to disclose the prevalence of the alpha-toxin variant in the sewage of wastewater treatment plants, as it may reflect the hygienic condition of the community, as it would be a pollution source for the environment. This study shows the persistent existence and genetic characteristics of the alpha-toxin variant in sewage and reveals a lacking mechanism of the alpha-toxin activity and proposes the detection method of C. perfringens, independent of the alpha-toxin activity.

Dataset Information

Data on occurrence of perfluoroalkyl substances in influents and effluents collected from different wastewater treatment plants in Latvia.

Publications

Data on occurrence of perfluoroalkyl substances in influents and effluents collected from different wastewater treatment plants in Latvia.

Similar Datasets

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