University of Illinois Urbana-Champaign

Quantifying the susceptibility of emerging aquatic herbicides to photodegradation and sorption in freshwater environments

Van Frost, Sydney

Content Files
VanFrost_Sydney_ECEC22.pdf

Permalink

https://hdl.handle.net/2142/114143

Description

Title
Quantifying the susceptibility of emerging aquatic herbicides to photodegradation and sorption in freshwater environments
Author(s)
Van Frost, Sydney
Issue Date
2022-04-28
Keyword(s)
  • per- and polyfluoroalkyl substances
  • PFAS
Date of Ingest
2022-05-04T16:15:46Z
Abstract
The herbicides fluridone and florpyrauxifen-benzyl (FPB) are commonly applied to surface waters to combat invasive aquatic plants. While these compounds are effective at limiting target plant growth, it is important to understand their persistence in the environment to prevent increased tolerance by target species and unintended harm to native vegetation. We investigate photodegradation and sorption to sediment, the two major abiotic pathways of herbicide removal from lakes. Experiments to calculate photodegradation rates are carried out in a Rayonet merry-go-round photoreactor with bulb irradiance at 311 nm and 365 nm. Sorption kinetics and equilibrium partitioning constants are measured using sediment samples collected from lakes in Wisconsin. While both herbicides undergo photodegradation under laboratory conditions, our results demonstrate that fluridone is more susceptible to photodegradation. In contrast, FPB sorbs more strongly than fluridone, which aligns with its lower solubility. Little information is available about these herbicides given their short history of use. Therefore, knowledge about their behavior in freshwater environments is critical to applying these herbicides for invasive species control.
Series/Report Name or Number
2022 Emerging Contaminants in the Environment Conference (ECEC22)
Type of Resource
  • text
  • still image
Genre of Resource
  • presentation/lecture/speech
  • conference paper
Language
en
Permalink
  • https://youtu.be/c4BKrkQbvWY
  • http://hdl.handle.net/2142/114143

Owning Collections

2022 Emerging Contaminants in the Environment Conference (ECEC22) PRIMARY