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Influence of Season...
Influence of Season on Biodegradation Rates in Rivers
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- Tian, Run, 1994- (author)
- Stockholms universitet,Institutionen för miljövetenskap
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- Posselt, Malte, 1987- (author)
- Stockholms universitet,Institutionen för miljövetenskap
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- Miaz, Luc T. (author)
- Stockholms universitet,Institutionen för miljövetenskap
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Fenner, Kathrin (author)
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- McLachlan, Michael S., 1959- (author)
- Stockholms universitet,Institutionen för miljövetenskap
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Environmental Science and Technology. - 0013-936X .- 1520-5851.
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Biodegradation plays a key role in the fate of chemicals in the environment. The variability of biodegradation in time can cause uncertainty in evaluating the environmental persistence and risk of chemicals. However, the seasonality of biodegradation in rivers has not yet been the subject of environmentally relevant testing and systematic investigation for large numbers of chemicals. In this work, we studied the biodegradation of 96 compounds during four seasons at four locations (up- and downstream of WWTPs located on two Swedish rivers). Significant seasonality (ANOVA, p < 0.05) of the first-order rate constant for primary biodegradation was observed for most compounds. Variations in pH and total bacterial cell count were not the major factors explaining the seasonality of biodegradation. Deviation from the classical Arrhenius-type behavior was observed for most of the studied compounds, which calls into question the application of this relationship to correct biodegradation rate constants for differences in environmental temperature. Similarities in magnitude and seasonality of biodegradation rate constants were observed for some groups of chemicals possessing the same functional groups. Moreover, reduced seasonality of biodegradation was observed downstream of WWTPs, while biodegradation rates of most compounds were not significantly different between up- and downstream.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- biodegradation
- seasonality
- up- and downstream
- micropollutants
- total cell count
Publication and Content Type
- ref (subject category)
- art (subject category)
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