Cited by 16Per- and polyfluoroalkyl substances researchToxic Organic Pollutants ImpactMarine and coastal ecosystems

Fractionation and tidal characteristics of per- and polyfluoroalkyl substances in the estuarine maximum turbidity zone

Liu, Chang, Ma, Xin-Xin, Wang, Si-Quan, Li, Qin, Cheng, Peng, Hou, Wei, Li, Yong-Yu, Li, Wen-Long +1 more·2024·Science of The Total Environment

Abstract

Complex tidal processes and suspended particulate matter (SPM) behavior influence the land-sea transport of terrestrial contaminants in estuaries. Contaminants are generally trapped within the estuarine maximum turbidity zone (MTZ), where SPM concentrations peak, misleading flux estimation. Here, we conducted high-resolution continuous sampling over two tidal cycles within the MTZ of a semidiurnal estuary. Tidal variations of per- and polyfluoroalkyl substances (PFAS), a class of persistent organic pollutants, were analyzed in dissolved water and size-fractionated SPM. Results showed that variations in dissolved PFAS may related to the mixing of upstream and downstream. The predominant size range for SPM was found in 1-31 μm (75 %, mainly 10-31 μm), but the PFAS tended to be sorbed by 0.22-1 μm (60 %) and > 31 μm (37 %) fractions. Except during periods of sediment resuspension when particulate PFAS concentration decreased, the PFAS concentration in the 1-31 μm increased during flood tides and decreased during ebb tides, which may not be related to organic carbon/elemental carbon levels. The hourly dynamic flux of dissolved-phase and particulate-phase PFAS transport to the sea in the MTZ was calculated by combining it with a hydrodynamic model. This study first highlights the size-fractionated PFAS transport under tidal influences and provides hourly flux estimation with a hydrodynamic model.

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Crossref · 10.1016/j.scitotenv.2024.177646

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Authors
Liu, C., Ma, X.-X., Wang, S.-Q., Li, Q., Cheng, P., Hou, W., Li, Y.-Y., Li, W.-L., & Wang, X.-H.
Affiliations
  • Xiamen University (CN)
  • Anhui Agricultural University (CN)
Venue
Science of The Total Environment
Publisher
Elsevier BV
Published
2024-12
Volume
957
Pages
177646
ISSN
0048-9697 (ISSN-L)
OpenAlex
W4404607947
Cited by
16
References
79
Citations by year
2026: 8 · 2025: 8
FWCI
2.11
Type
journal article
Language
en
Open access
closed
Locations
  • The Science of The Total Environment (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
Keywords
per- and polyfluoroalkyl substances, PFAS, suspended particulate matter, tidal dynamics, sediment resuspension, hydrodynamic modeling, organic carbon

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