Cited by 134Water Treatment and DisinfectionToxic Organic Pollutants ImpactFire effects on ecosystems

Wildfire Altering Terrestrial Precursors of Disinfection Byproducts in Forest Detritus

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Wang, Jun-Jian, Dahlgren, Randy A., Erşan, Mahmut S., Karanfil, Tanju, Chow, Alex T.·2015·Environmental Science & Technology

Abstract

Wildfire occurrence and intensity are increasing worldwide causing severe disturbances to forest watersheds used for potable water supply. The effects of wildfire on drinking water quality are not well understood, especially in terms of terrestrial dissolved organic matter (DOM) and DOM-associated formation of disinfection byproducts (DBP). As the forest floor layer is a major source of terrestrial DOM, we investigated characteristics and DBP formation of water extractable organic matter (WEOM) from the 0-5 cm depth of nonburned detritus (control) and burned detritus with black ash (moderate severity) and white ash (high severity) associated with the 2013 Rim Fire in California. Spectroscopic results suggested that the aromaticity of WEOM followed white ash > control > black ash and fluorescence region II (excitation 220-250 nm; emission 330-380 nm) of the emission-excitation-matrix was identified as a potential burn severity indicator. Compared to the control, WEOM from white and black ashes had lower reactivity in forming trihalomethanes (55%-of-control) and haloacetic acids (67%-of-control), but higher reactivity in forming the more carcinogenic haloacetonitrile after chlorination (244%-of-control) and N-nitrosodimethylamine after chloramination (229%-of-control). There was no change in reactivity for chloral hydrate formation, while WEOM from black ash showed a higher reactivity for haloketone formation (150%-of-control). Because wildfire consumed a large portion of organic matter from the detritus layer, there was lower water extractable organic carbon (27%-of-control) and organic nitrogen (19%-of-control) yields in ashes. Consequently, the wildfire caused an overall reduction in water extractable terrestrial DBP precursor yield from detritus materials.

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Crossref · 10.1021/es505836m

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  • DBP formation potential from wildfire-generated DON/DOC has been found in several other experimental studies as well, including increased HAA/HAN/THM formation potential from source water collected below other fires in Colorado and exposed to chlorine; dissolved black carbon extracted from burnt leaves of several species in South Carolina; and water extracted organic matter taken from California

    “DBP formation potential from wildfire-generated DON/DOC has been found in several other experimental studies as well, including increased HAA/HAN/THM formation potential from source water collected below other fires in Colorado and exposed to chlorine; dissolved black carbon extracted from burnt leaves of several species in South Carolina; and water extracted organic matter taken from California”
  • Each experimental study found both elevated carbon- and nitrogen-based DBPs.

    “Each experimental study found both elevated carbon- and nitrogen-based DBPs.”

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Authors
Wang, J.-J., Dahlgren, R. A., Erşan, M. S., Karanfil, T., & Chow, A. T.
Affiliations
  • Baruch Institute of Coastal Ecology and Forest Science, Clemson University, Georgetown, South Carolina 29442, United States
  • University of California, Davis (US)
  • Clemson University (US)
Corresponding author
Chow, Alex T.
Venue
Environmental Science & Technology
Published
2015-05-06
Volume
49
Issue
10
Pages
5921-5929
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2071160033
Cited by
134
References
54
Citations by year
2026: 13 · 2025: 17 · 2024: 14 · 2023: 19 · 2022: 13 · 2021: 8 · 2020: 12 · 2019: 15 · 2018: 9 · 2017: 5 · 2016: 6 · 2015: 3
FWCI
4.81
Type
journal article
Language
en
Open access
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institute of Food and Agriculture (2014-67019-21615, SC1700489)
  • Division of Chemical, Bioengineering, Environmental, and Transport Systems (1264579)
  • Joint Fire Science Program (14-1-06-19)
Topics
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Water Treatment and Disinfection
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
Keywords
forest fires, disinfection by-products, dissolved organic matter, burn severity, water-extractable organic matter, trihalomethanes, haloacetic acids, haloacetonitriles, N-nitrosodimethylamine, chloral hydrate, haloketones, drinking water quality, fluorescence excitation-emission matrix, aromaticity
MeSH terms
Bromine, California, Carbon, Dimethylnitrosamine, Disinfection, Fires, Fluorescence, Nitrogen, Trihalomethanes, Halogenation, Water Quality, Forests

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