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Characterization and Application of Passive Samplers for Monitoring of Pesticides in Water
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Bioavailable Environmental Pollutant Patterns in Sediments from Passive Equilibrium Sampling.

Melis Muz1,2, Beate I Escher1,3, Annika Jahnke1,4

  • 1Department of Cell Toxicology, UFZ Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318 Leipzig, Germany.

Environmental Science & Technology
|November 20, 2020
PubMed
Summary
This summary is machine-generated.

Bioavailable chemicals in sediments pose risks not reflected by total concentrations. Passive sampling revealed distinct global contamination patterns, with most mixtures being site-specific, highlighting the need for advanced monitoring.

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Area of Science:

  • Environmental Chemistry
  • Ecotoxicology
  • Analytical Chemistry

Background:

  • Sediment contamination risks are linked to bioavailable chemical fractions, not total concentrations.
  • Understanding these bioavailable fractions is crucial for accurate environmental risk assessment.

Purpose of the Study:

  • To investigate global sediment contamination patterns of bioavailable chemicals using passive sampling.
  • To analyze chemical mixtures and predict their mixture toxicity effects.
  • To assess the utility of passive sampling for monitoring sediment-associated chemical risks.

Main Methods:

  • Utilized passive equilibrium sampling to collect bioavailable chemicals from global sediments.
  • Analyzed extracts using gas chromatography-high resolution mass spectrometry for 121 legacy and emerging contaminants.
  • Employed a mixture toxicity model combining concentration addition and independent action principles.

Main Results:

  • Distinct spatial contamination patterns were observed across sampling sites, with mostly site-specific chemical mixtures.
  • Polycyclic aromatic hydrocarbons dominated predicted mixture effects.
  • Detected chemicals explained less than 10% of observed oxidative stress and arylhydrocarbon receptor activation, except at two Swedish sites.

Conclusions:

  • Passive sampling effectively characterizes bioavailable sediment contamination.
  • Current analytical methods may not fully explain observed biological effects in sediments.
  • Further research is needed to identify and quantify all contributing bioactive chemicals in sediment mixtures.