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Layer-specific mechanisms of perfluoroalkyl acid (PFAA) transport and partition in estuarine environments: Unveiling the depth-dependent differences.
Dong, Jianwei; Feng, Ranran; Yao, Zhiming; Wang, Jun; Wang, Yang; Wang, Hongbing; Yan, Dandan; Cui, Yang; Xie, Hui; Du, Yongfen; Xia, Xinghui.
Afiliación
  • Dong J; School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China.
  • Feng R; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China.
  • Yao Z; School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China.
  • Wang J; College of Animal Science and Engineering, Yangzhou University, Yangzhou 225001, China.
  • Wang Y; Haikou Marine Geological Survey Center, China Geological Survey, Haikou 571172, China.
  • Wang H; Haikou Marine Geological Survey Center, China Geological Survey, Haikou 571172, China.
  • Yan D; State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China. Electronic address: yandandan0113@163.com.
  • Cui Y; School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China.
  • Xie H; Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. Electronic address: hxie@niglas.ac.cn.
  • Du Y; School of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China.
  • Xia X; Key Laboratory for Water and Sediment Science, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, China.
J Hazard Mater ; 473: 134675, 2024 Jul 15.
Article en En | MEDLINE | ID: mdl-38788578
ABSTRACT
Understanding of characteristics and transport of perfluoroalkyl acids (PFAAs) in heterogeneous estuarine environments is limited. Furthermore, the role of suspended particles (SPS) in different layers remains unclear. This study explores the multiphase distribution process and mechanism of PFAAs controlled by SPS across surface and bottom layers in five small estuaries. Peaks in PFAA concentrations are consistently observed at strongly stratified sites. Concentrations of the PFAAs in both surface and bottom SPS decreased as the degree of mixing increased from strongly stratified levels to well-mixed levels. The water-SPS partitioning of some short-chain PFAAs (PFBS, PFHxA, and PFHpA) is influenced by environmental factors (pH, depth, temperature, and salinity) due to electrostatic interactions, while the sorption of some long-chain PFAAs (PFOA, PFOS, and PFNA) is controlled by SPS and dissolved organic carbon (OC), driven by hydrophobic interactions. Additionally, SPS dominates OC transport in estuarine systems, except in sandy sediment environments. SPS plays a dominant role in PFAA partitioning in both surface and bottom water-SPS systems (p < 0.05), and salinity only significantly affects PFBS in bottom layer (p < 0.01). These findings are critical for understanding the drivers of PFAA partitioning and the roles of SPS in different layers, underscoring the necessity of considering particle-associated PFAA fractions in future coastal environmental management.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos