Removal of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) by coagulation: influence of coagulant and dosing conditions

Simple item page
dc.contributor.authorWang, Pin
dc.contributor.authorAn, Guangyu
dc.contributor.authorCarra, Irene
dc.contributor.authorHassard, Francis
dc.contributor.authorCampo Moreno, Pablo
dc.contributor.authorSakar, Hacer
dc.contributor.authorJodkowska, Monika
dc.contributor.authorWang, Dongsheng
dc.contributor.authorJefferson, Bruce
dc.contributor.authorChu, Wenhai
dc.contributor.authorJarvis, Peter
dc.date.accessioned2024-10-14T13:06:29Z
dc.date.available2024-10-14T13:06:29Z
dc.date.freetoread2024-10-14
dc.date.issued2025-03
dc.date.pubOnline2024-09-11
dc.description.abstractPer- and polyfluoroalkyl substances (PFAS) pose significant risks to the environment and human health. Perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) are two of the most frequently detected PFAS in the environment. In most surface water drinking water treatment works (WTW), coagulation is the first processes exposed to a range of contaminants, including PFAS. While not designed to be a process for removal of micropollutants, it is important to understand the fate of PFAS in coagulation processes, intended or otherwise, to determine whether water treatment sludge can be a significant sink for this group of micropollutants. This work advances understanding of PFAS removal in coagulation processes by comparing the removal of PFOA and PFOS by four metal coagulants (Zr, Zn, Fe, and Al) from real water matrices. The coagulant performance followed the order Al > Fe > Zr > Zn. Al was taken forward for further evaluation, with significant removal of PFAS (>15 % for PFOA and > 30 % for PFOS) being observed when the pH<5.5 and the dose was > 5 mg Al·L-1. The adsorption of PFOA and PFOS onto flocs through hydrophobic interaction was the primary removal route. The impacts of background matrix on the mechanisms of coagulation for PFAS were explored using five organic compounds. Macromolecular organic compounds contributed to an increase in removal due to the sorption of PFAS and subsequent removal of the organic-PFAS aggregate during coagulation. Low molecular weight organic matter inhibited the removal of PFAS due to the ineffective removal of these compounds during coagulation.
dc.description.journalNameSeparation and Purification Technology
dc.description.sponsorshipChina Scholarship Council
dc.description.sponsorshipThe authors would like to express their gratitude for the financial support of the work from the China Scholarship Council.
dc.identifier.citationWang P, An G, Carra I, Hassard F, et al., (2025) Removal of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) by coagulation: influence of coagulant and dosing conditions. Separation and Purification Technology, Volume 355, Part A, March 2025, Article number 129562
dc.identifier.eissn1873-3794
dc.identifier.elementsID553026
dc.identifier.issn1383-5866
dc.identifier.paperNo129562
dc.identifier.urihttps://doi.org/10.1016/j.seppur.2024.129562
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/23015
dc.identifier.volumeNo355
dc.languageEnglish
dc.language.isoen
dc.publisherElsevier BV
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S138358662403301X?via%3Dihub
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectPFAS
dc.subjectCoagulation
dc.subjectDrinking water treatment
dc.subjectHazardous waste management
dc.subject4004 Chemical Engineering
dc.subject40 Engineering
dc.subject4011 Environmental Engineering
dc.subjectFoodborne Illness
dc.subjectChemical Engineering
dc.subject4004 Chemical engineering
dc.subject4011 Environmental engineering
dc.titleRemoval of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) by coagulation: influence of coagulant and dosing conditions
dc.typeArticle
dc.type.subtypeJournal Article
dcterms.dateAccepted2024-09-04

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Removal_of_perfluorooctanoic_acid-2024.pdf
Size:
3.86 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Plain Text
Description:
Download

Collections

Staff publications (SWEE)