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Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation

Rachel Gough, Peter Holliman Orcid Logo, Gavan M. Cooke, Christopher Freeman

Sustainability of Water Quality and Ecology, Volume: 6, Pages: 11 - 19

Swansea University Author: Peter Holliman Orcid Logo

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DOI (Published version): 10.1016/j.swaqe.2014.12.008

Abstract

It is predicated that algal blooms will become an increasing problem under changing climatic conditions. This is particularly concerning for the potable water treatment industry since algogenic organic matter (AOM) in surface waters supplying water treatment works (WTWs) can cause a number of treatm...

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Published in: Sustainability of Water Quality and Ecology
ISSN: 2212-6139
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa37033
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first_indexed 2017-11-24T15:39:19Z
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spelling 2017-11-24T09:36:13.1433038 v2 37033 2017-11-24 Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation c8f52394d776279c9c690dc26066ddf9 0000-0002-9911-8513 Peter Holliman Peter Holliman true false 2017-11-24 MTLS It is predicated that algal blooms will become an increasing problem under changing climatic conditions. This is particularly concerning for the potable water treatment industry since algogenic organic matter (AOM) in surface waters supplying water treatment works (WTWs) can cause a number of treatment issues. However, whilst previous studies have shown that AOM is distinct from terrigenous, humic-dominated organic matter, limited information exists relating to changes in the character of AOM during different algal growth phases. In this study, reservoir water containing dissolved organic carbon (DOC) dominated by humic material was enriched with nutrient medium to create an algal bloom. Over the course of the algal bloom, DOC was characterised using XAD-fractionation and UV absorbance measurements. In addition, the reactivity of DOC with chlorine both before and after XAD-fractionation was assessed using trihalomethane formation potential (THMFP) and bromine incorporation measurements to monitor whether THM yield and speciation varied between different growth phases. Characterisation of DOC during the algal bloom indicated a shift towards more hydrophilic, aliphatic (low specific UV absorbance; SUVA) DOC with the release of extracellular organic matter (EOM) and later intracellular organic matter (IOM) during cell lysis. XAD-fractionation results suggest that algae produce predominantly hydrophilic neutral (HPIN) DOC. In contrast to some existing research, our study shows a marked change in DOC reactivity over time with a reduction in standardised THMFP (STHMFP) and the initial rate of THM formation observed as the algal bloom progressed. However, bromine incorporation increased with culture age. Journal Article Sustainability of Water Quality and Ecology 6 11 19 2212-6139 Algogenic organic matter, Dissolved organic carbon, Potable water treatment, Trihalomethane, XAD-fractionation 30 9 2015 2015-09-30 10.1016/j.swaqe.2014.12.008 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2017-11-24T09:36:13.1433038 2017-11-24T09:33:41.1469451 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Rachel Gough 1 Peter Holliman 0000-0002-9911-8513 2 Gavan M. Cooke 3 Christopher Freeman 4
title Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation
spellingShingle Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation
Peter Holliman
title_short Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation
title_full Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation
title_fullStr Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation
title_full_unstemmed Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation
title_sort Characterisation of algogenic organic matter during an algal bloom and its implications for trihalomethane formation
author_id_str_mv c8f52394d776279c9c690dc26066ddf9
author_id_fullname_str_mv c8f52394d776279c9c690dc26066ddf9_***_Peter Holliman
author Peter Holliman
author2 Rachel Gough
Peter Holliman
Gavan M. Cooke
Christopher Freeman
format Journal article
container_title Sustainability of Water Quality and Ecology
container_volume 6
container_start_page 11
publishDate 2015
institution Swansea University
issn 2212-6139
doi_str_mv 10.1016/j.swaqe.2014.12.008
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 0
active_str 0
description It is predicated that algal blooms will become an increasing problem under changing climatic conditions. This is particularly concerning for the potable water treatment industry since algogenic organic matter (AOM) in surface waters supplying water treatment works (WTWs) can cause a number of treatment issues. However, whilst previous studies have shown that AOM is distinct from terrigenous, humic-dominated organic matter, limited information exists relating to changes in the character of AOM during different algal growth phases. In this study, reservoir water containing dissolved organic carbon (DOC) dominated by humic material was enriched with nutrient medium to create an algal bloom. Over the course of the algal bloom, DOC was characterised using XAD-fractionation and UV absorbance measurements. In addition, the reactivity of DOC with chlorine both before and after XAD-fractionation was assessed using trihalomethane formation potential (THMFP) and bromine incorporation measurements to monitor whether THM yield and speciation varied between different growth phases. Characterisation of DOC during the algal bloom indicated a shift towards more hydrophilic, aliphatic (low specific UV absorbance; SUVA) DOC with the release of extracellular organic matter (EOM) and later intracellular organic matter (IOM) during cell lysis. XAD-fractionation results suggest that algae produce predominantly hydrophilic neutral (HPIN) DOC. In contrast to some existing research, our study shows a marked change in DOC reactivity over time with a reduction in standardised THMFP (STHMFP) and the initial rate of THM formation observed as the algal bloom progressed. However, bromine incorporation increased with culture age.
published_date 2015-09-30T03:46:32Z
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score 11.037166

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