From microalgae to gastropods: Understanding the kinetics and toxicity of silver nanoparticles in freshwater aquatic environment

Environmental Pollution, Journal Year: 2025, Volume and Issue: 367, P. 125643 - 125643

Published: Jan. 5, 2025

Silver nanoparticles (AgNPs) are increasingly used in various consumer products and industrial applications, raising concerns about their environmental impact on aquatic ecosystems. This study investigated the physicochemical stability, trophic transfer, toxic effects of citrate-coated AgNPs a freshwater food chain including diatom Cyclotella meneghiniana gastropod Lymnaea stagnalis. remained stable exposure medium, with minimal dissolution (<0.06%) after 24 h, indicating that particulate forms dominated during exposure. inhibited growth C. without significantly affecting chlorophyll-a content or reactive oxygen species (ROS) production. Scanning electron microscopy revealed extracellular polymeric substance (EPS) secretion, which likely formed eco-coronas, reducing bioavailability oxidative damage. However, trace element analysis showed significant depletion iron, manganese, nickel, early metabolic stress redistribution essential metals to support antioxidant defenses. In L. stagnalis, toxicokinetic distinct patterns Ag uptake depuration across routes. Waterborne foodborne resulted similar higher accumulation compared combined group. highest non-eliminable fraction bioconcentration factor (BCF) > 1, efficient retention. Foodborne exhibited biomagnification (BMF) despite elimination. Combined had rate, BCF >1 BMF <1, reflecting reduced transfer potential. Oxidative stagnalis was exposure, increased ROS hemolymph uptake. caused prolonged immune stress, evidenced by elevated total capacity (TAC) protein levels. hepatopancreas, led lipid peroxidation TAC, challenges specific dietary These results highlighted complex interactions primary producers consumers ecosystems, emphasizing need for multi-route assessments nanoparticle risk evaluations.

Language: Английский

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Eco-corona Formation on Aminated Nanoplastics Interacted with Extracellular Polymeric Substances from Bloom-forming Cyanobacteria: Insightful Mechanisms with DFT Study

Water Research, Journal Year: 2025, Volume and Issue: 278, P. 123394 - 123394

Published: Feb. 25, 2025

Language: Английский

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Evaluating Cell Surface Extraction Methods for Improved Assessment of Silver Nanoparticle Bioaccumulation

Aquatic Toxicology, Journal Year: 2025, Volume and Issue: unknown, P. 107340 - 107340

Published: March 1, 2025

Language: Английский

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A Review of Eco-Corona Formation on Micro/Nanoplastics and Its Effects on Stability, Bioavailability, and Toxicity

Water, Journal Year: 2025, Volume and Issue: 17(8), P. 1124 - 1124

Published: April 10, 2025

Micro/nanoplastics (M/NPs) have become prevalent in aquatic environments due to their widespread applications. Likewise, ubiquitous ecological macromolecules can adsorb onto M/NPs form an “eco-corona”, which significantly alters environmental behaviors including aggregation dynamics, adsorption/desorption, and bioavailability. Therefore, it is necessary analyze the role of eco-corona assessing risks M/NPs. This review systematically summarizes formation mechanisms evaluates its regulatory effects on stability ecotoxicity Compared with other (e.g., natural organic matter extracellular polymeric substances), humic acid (HA) tightly binds through electrostatic hydrophobic interactions, affecting hetero-aggregation behavior colloidal stability. In terms bioavailability, various functional groups HA surface regulate charge hydrophobicity M/NPs, thereby bioaccumulation “Trojan horse” effect. Notably, corona alleviates M/NPs-induced growth inhibition oxidative stress. Genotoxicity assessment further showed that expression genes related stress response detoxification pathways. Future studies should focus synergistic between co-existing pollutants complex elucidate long-term associated formation.

Language: Английский

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Antagonistic effect of polystyrene nanoplastics and sliver nanoparticles on Chlorella pyrenoidosa

Journal of Environmental Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Comparative Analysis of Species-Specific Dissolved Gaseous Mercury Oxidation in Phytoplankton Cultures

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121764 - 121764

Published: May 1, 2025

Phytoplankton species influence mercury cycling through bioaccumulation and Hg(II) reduction, however their contribution to oxidation of Hg(0) in aquatic systems remains largely overlooked. The present study aims at investigating the by two phytoplankton species: diatom Cyclotella meneghiniana green alga Chlamydomonas reinhardtii. algae were exposed gaseous concentrations range 6 - 12 μg m-3, representative for contaminated environments, under various experimental conditions (open vs. closed systems, light vs dark, alive dead cells). obtained results revealed, a first time, that C. cultures was light-dependent limited live cells, whereas reinhardtii maintained similar rates both cells. exhibited nearly tenfold higher efficiency than meneghiniana, demonstrating strong species-dependent effect. Both facilitated uptake from air into water, potential route atmospheric enter food webs. This novel evidence phytoplankton-mediated highlights importance identity environmental governing Hg transformations bioavailability. could have significant implications understanding toxicity ecosystems. Further research is needed clarify elucidate underlying mechanisms driving process.

Language: Английский

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Asymmetric Flow Field-Flow Fractionation for Comprehensive Characterization of Hetero-Aggregates Made of Nano-Silver and Extracellular Polymeric Substances

Published: Jan. 1, 2024

Language: Английский

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Asymmetric Flow Field-Flow Fractionation for Comprehensive Characterization of Hetero-aggregates made of nano-Silver and Extracellular Polymeric Substances

Journal of Chromatography A, Journal Year: 2024, Volume and Issue: 1739, P. 465507 - 465507

Published: Nov. 7, 2024

The present study explores the capability of asymmetrical flow field-flow fractionation (AF4) coupled online with diode array (DAD), fluorescence detectors (FLD), multi-angle light scattering (MALS) and dynamic (DLS) to characterize silver nanoparticles (nAg) hetero-aggregates formed diatoms derived extracellular polymeric substances (EPS). content EPS varied from 10.5 105 mgC L

Language: Английский

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