Persistent Organic Pollutants and Ecotoxicology in the Aquatic Environments

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Ecotoxicology".

Deadline for manuscript submissions: 31 August 2026 | Viewed by 1033

Special Issue Editors


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Guest Editor
Institute of Environment, Florida International University, Miami, FL 33199, USA
Interests: acoustics, anthropogenic and environmental pressures; bioenergetics; cetaceans; conservation biology; conservation physiology; ecology; ecotoxicology; endocrinology; marine mammals; One Health; oxidative stress biomarkers; physiological responses; physiology; sirenians; toxicology; wildlife; zoology
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Guest Editor
Environmental Health Assessment and Promotion Laboratory, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro CEP 21040-900, Brazil
Interests: biological oceanography; environmental chemistry; ecotoxicology; One Health; food safety; (metalo) proteomics; conservation of natural and fishery resources; scientific dissemination and environmental education
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Persistent Organic Pollutants (POPs) represent a class of toxic chemicals that resist degradation, bioaccumulate in aquatic food webs, and pose significant risks to environmental and human health. These compounds, including polychlorinated biphenyls (PCBs), dioxins, pesticides, polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides, new emerging compounds such as per- and polyfluoroalkyl substances (PFAS), and pseudo POPs such as organophosphate esters (OPEs) among others, are globally distributed and often detected in sediments, biota, and water, even in remote marine ecosystems. Their persistence and lipophilicity enable trophic transfer and long-term exposure, particularly in aquatic environments.

This Special Issue aims to highlight current advances in the ecotoxicological assessment of POPs in aquatic environments, from freshwater systems to estuaries and coastal and oceanic zones. We invite contributions that investigate the fate, transport, and effects of POPs using bioaccumulation models, biomarker approaches, and novel detection technologies. Emphasis is placed on studies that link contaminant exposure to molecular, cellular, and organismal responses, including endocrine disruption, oxidative stress, reproductive impairment, and dysbiosis.

We encourage original research and reviews addressing cross-species comparisons, long-term monitoring, and the integration of POP-related effects with conservation and risk assessment frameworks. Submissions focusing on emerging POPs, mixtures, interactive stressors, and their implications for One Health and ecosystem resilience are especially welcome.

Dr. Leila Soledade Lemos
Dr. Rachel Ann Hauser-Davis
Guest Editors

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Keywords

  • bioaccumulation
  • trophic transfer
  • endocrine disruption
  • aquatic toxicology
  • environmental persistence
  • organic pollutants

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Published Papers (1 paper)

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Research

28 pages, 3114 KB  
Article
Occurrence, Pollution Characteristics, Mass Load and Ecological Risk Assessment of Per- and Polyfluoroalkyl Substances in the Dianchi Basin, China
by Hongyi Liang, Tingting Ding, Yahui Zhang, Feng Miao, Zejun Wang, Shilin Du and Jiale Cao
Toxics 2026, 14(3), 196; https://doi.org/10.3390/toxics14030196 - 26 Feb 2026
Viewed by 686
Abstract
Per- and polyfluoroalkyl substances (PFASs) have attracted attention as emerging contaminants due to their persistence, bioaccumulation, and toxicity risks. This study investigated the characteristics, sources, mass loads, and ecological risks of 17 PFASs in surface waters and sediments from Dianchi Lake and its [...] Read more.
Per- and polyfluoroalkyl substances (PFASs) have attracted attention as emerging contaminants due to their persistence, bioaccumulation, and toxicity risks. This study investigated the characteristics, sources, mass loads, and ecological risks of 17 PFASs in surface waters and sediments from Dianchi Lake and its tributaries. During the wet season, the PFAS concentrations in the lake and river waters ranged from below the MDL (N.D.) to 11.21 ng/L and N.D. to 20.79 ng/L, respectively, while in the sediments, they were N.D. to 10.21 ng/g dry weight (dw) and N.D. to 9.63 ng/g dw. In the dry season, the lake and river water concentrations were N.D − 9.49 ng/L and N.D. − 15.67 ng/L, with those in sediments ranging from N.D. to 11.47 ng/g dw and from N.D. to 9.93 ng/g dw. Distribution coefficient analysis indicated that long-chain PFASs and sulfonic acid groups were preferentially enriched in sediments. In rivers, major sources included industrial discharges, domestic inputs, metal electroplating activities, and atmospheric deposition. In the lake, PFASs were mainly derived from mixed sources, atmospheric deposition, and riverine inflow, the latter being dominant. The PFAS loads from tributaries were estimated at 24.75 kg in the wet season and 8.79 kg in the dry season. The risk quotient values were low in waters (0.01) but ranged from 0.01 to 1 in sediments, indicating low to moderate risk, primarily from long-chain PFASs. Although ecological risk is limited, persistent inputs and contributions from tributaries highlight the necessity for continued monitoring and management. The results of this study deepen the understanding of PFAS contamination in this and other similar plateau lake basins, providing references for environmental management. Full article
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