Počet záznamů: 1
Coagulation of polyvinyl chloride microplastics by ferric and aluminium sulphate: Optimization of reaction conditions and removal mechanisms
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SYSNO ASEP 0545948 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Coagulation of polyvinyl chloride microplastics by ferric and aluminium sulphate: Optimization of reaction conditions and removal mechanisms Tvůrce(i) Prokopová, Michaela (UH-J) ORCID, RID, SAI
Novotná, Kateřina (UH-J) SAI, ORCID, RID
Pivokonská, Lenka (UH-J) SAI, ORCID, RID
Čermáková, Lenka (UH-J) RID, ORCID, SAI
Cajthaml, Tomáš (MBU-M) RID, ORCID
Pivokonský, Martin (UH-J) SAI, ORCID, RIDČíslo článku 106465 Zdroj.dok. Journal of Environmental Chemical Engineering. - : Elsevier - ISSN 2213-2929
Roč. 9, č. 6 (2021)Poč.str. 9 s. Forma vydání Online - E Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova coagulation ; drinking water ; microplastics ; polyvinyl chloride ; water treatment Vědní obor RIV DJ - Znečištění a kontrola vody Obor OECD Environmental sciences (social aspects to be 5.7) Vědní obor RIV – spolupráce Mikrobiologický ústav - Biotechnologie a bionika CEP GA20-29315S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UH-J - RVO:67985874 ; MBU-M - RVO:61388971 UT WOS 000707234500005 EID SCOPUS 85116355092 DOI https://doi.org/10.1016/j.jece.2021.106465 Anotace The occurrence of microplastics (MPs) in water intended for human consumption, including water supplied by drinking water treatment plants (DWTPs), has raised considerable attention. DWTPs appear to be capable of removing some of the MPs present in raw water. However, little is known about the efficiency of distinct treatment processes for MP elimination. This study investigated the coagulation of model MPs, i.e., polyvinyl chloride particles < 50 µm, using ferric and aluminium sulphate. The effects of the coagulant type, dose, and coagulation pH value were described, and different methods of aggregate separation were applied. It has shown that certain proportion of MPs could be removed even in the absence of coagulant via sedimentation or deep-bed filtration, herein simulated by centrifugation. However, when either Fe- or Al-based coagulation was conducted under suitable conditions (ferric sulphate at 20 mg L−1 and coagulation pH 7–8, or 40–60 mg L−1 and pH 5–8, aluminium sulphate at 20–60 mg L−1 and pH 7–8), the removal efficiency of MPs by coagulation-sedimentation significantly increased. The residual MP concentrations then approached those obtained after centrifugation and corresponded to approximately 80% removal. However, when focusing on Fe and Al residuals, a narrower coagulation optimum was defined. Under the optimised coagulation conditions, MPs ≥ 15 µm were completely removed. Nevertheless, a certain fraction of MPs (approximately 20% of the initial concentration, vast majority < 5 µm) was not removable despite the wide range of coagulation conditions tested, which points out the limits of coagulation for MP removal. Pracoviště Ústav pro hydrodynamiku Kontakt Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Rok sběru 2022 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S2213343721014421?via%3Dihub
Počet záznamů: 1