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Occurrence and fate of microplastics at two different drinking water treatment plants within a river catchment
- 1.0524950 - ÚH 2021 RIV NL eng J - Journal Article
Pivokonský, Martin - Pivokonská, Lenka - Novotná, Kateřina - Čermáková, Lenka - Klimtová, M.
Occurrence and fate of microplastics at two different drinking water treatment plants within a river catchment.
Science of the Total Environment. Roč. 741, November (2020), č. článku 140236. ISSN 0048-9697. E-ISSN 1879-1026
Institutional support: RVO:67985874
Keywords : coagulation-flocculation * deep-bed filtration * granular activated carbon * microplastics * sedimentation * water treatment
OECD category: Environmental sciences (social aspects to be 5.7)
Impact factor: 7.963, year: 2020
Method of publishing: Limited access
Microplastics (MPs) are emerging globally distributed pollutants of aquatic environments, and little is known about their fate at drinking water treatment plants (DWTPs), which provide a barrier preventing MPs from entering water for human consumption. This study investigated MPs ≥ 1 μm in raw and treated water of two DWTPs that both lie on the same river, but the local quality ofwater and the treatment technology applied differ. In the case of the more complex DWTP, MPs were analysed at 4 additional sampling sites along the treatment chain. The content of MPs varied greatly between the DWTPs. There were 23 ± 2 and 14 ± 1 MPs L−1 in raw and treated water, respectively, at one DWTP, and 1296 ± 35 and 151 ± 4 MPs L−1 at the other. Nevertheless, MPs comprised only a minor proportion (b0.02%) of all detected particles at both DWTPs. With regard to size and shape of MPs, the majority (N70%) were smaller than 10 μm, and only fragments and fibres were found, while fragments clearly prevailed. The most frequently occurring materials were cellulose acetate, polyethylene terephthalate, polyvinyl chloride, polyethylene, and polypropylene. Much higher total removal of MPs was achieved at the DWTP with a higher initial MP load and more complicated treatment (removal of 88% versus 40%), coagulation-flocculation-sedimentation, deep-bed filtration through clay-based material, and granular activated carbon filtration contributed to MP elimination by 62%, 20%, and 6%, respectively. Additionally, results from this more complex DWTP enabled to observe relationships between the removal efficiency and size and shape of MPs, particularly in the case of the filtration steps.
Permanent Link: http://hdl.handle.net/11104/0309485
Number of the records: 1