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Pilot-scale removal of organic micropollutants and natural organic matter from drinking water using ozonation followed by granular activated carbon

Ullberg, Malin and Lavonen, Elin and Köhler, Stephan and Golovko, Oksana and Wiberg, Karin (2021). Pilot-scale removal of organic micropollutants and natural organic matter from drinking water using ozonation followed by granular activated carbon. Environmental Science: Water Research & Technology. 7 , 535-548
[Research article]

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Abstract

Conventional drinking water treatment is inefficient in removing a large fraction of known organic micropollutants (OMPs). Therefore more efficient treatment approaches are needed to limit exposure to OMPs via drinking water. Here, the OMP removal performance of a combination of ozonation/no ozonation and two types of granular activated carbon (GAC) was tested in a one-year pilot-scale study, alongside a study of full-scale treatment. The raw water was lake water with low ambient concentrations of OMPs. In total, 29 of 99 targeted OMPs (per- and polyfluoroalkyl substances (PFASs), pharmaceuticals and other OMPs) were detected (mean n-ary sumation OMPs = 57 +/- 16 ng L-1). Only a few OMPs were consistently removed in the full-scale process, while ozonation in the pilot experiment effectively removed 72% of detected compounds to levels <30%. The GAC columns showed breakthrough of OMPs and dissolved organic carbon (DOC) for both ozonated and non-ozonated water, with earlier breakthrough for DOC than OMPs. Breakthrough of OMPs was delayed in ozonated columns, possibly because of lower adsorption competition with low-molecular-weight natural organic matter (NOM) fractions measured with liquid chromatography (LC-OCD). The OMP removal performance of the two GAC materials was not affected by greater DOC loading, but Filtrasorb showed 25% higher removal of DOC without losing capacity to remove OMPs. Compounds with low log K-OC tended to break through earlier than those with higher K-OC values. The lowest levels of OMPs were observed in GAC effluents using ozonated feed water demonstrating the efficacy of combining ozone with GAC for managing OMP levels during drinking water production.

Authors/Creators:Ullberg, Malin and Lavonen, Elin and Köhler, Stephan and Golovko, Oksana and Wiberg, Karin
Title:Pilot-scale removal of organic micropollutants and natural organic matter from drinking water using ozonation followed by granular activated carbon
Series Name/Journal:Environmental Science: Water Research & Technology
Year of publishing :2021
Volume:7
Page range:535-548
Number of Pages:14
Publisher:ROYAL SOC CHEMISTRY
ISSN:2053-1400
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 3.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 208 Environmental Biotechnology > Water Treatment
URN:NBN:urn:nbn:se:slu:epsilon-p-111414
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111414
Additional ID:
Type of IDID
DOI10.1039/d0ew00933d
Web of Science (WoS)000629315800004
ID Code:23269
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:14 Apr 2021 15:13
Metadata Last Modified:14 Apr 2021 15:21

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