Bioelectrochemistry promotes microbial activity and accelerates wastewater methanogenesis in anaerobic digestion under combined exposure to antibiotics and microplastics

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 138053 - 138053

Published: March 1, 2025

Language: Английский

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Exposure to Polystyrene Nanoplastics Compromise Ovarian Reserve Function and Endometrial Decidualization in Early Pregnant Mice

Journal of Applied Toxicology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

ABSTRACT In the environment, nanoplastics (NPs) have been shown to adversely impact reproductive health, yet research on their effects during early pregnancy is scarce. This study investigated of NPs endometrial decidualization in pregnant mice and fertility. Female were administered polystyrene (PS‐NPs) orally for 90 days before pregnancy. Our findings indicated that PS‐NPs exposure decreased live birth rate neonatal crown‐rump length. Decreased embryo implantation sites uterine wet weight observed post exposure. Histological examination revealed structural defects uteri a significant reduction follicular count across all stages PS‐NPs‐treated groups. Serum levels estradiol (E 2 ) progesterone (P) elevated, while follicle‐stimulating hormone (FSH) luteinizing (LH) diminished post‐exposure. Additionally, upregulated expression marker HOXA10 decidua. conclusion, our results suggest may disrupt disruption likely due perturbation hormonal balance within hypothalamic–pituitary–ovary including FSH, LH, E , P levels. These alterations arrest development, consequently leading detrimental outcomes compromised conditions. provided new perspective understanding possible microplastics female

Language: Английский

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Correcting microplastic pollution and risk assessment in Chinese watersheds

Environmental Pollution, Journal Year: 2025, Volume and Issue: 374, P. 126241 - 126241

Published: April 11, 2025

Language: Английский

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Viscosity of Polycaprolactone Microplastic Dispersions and Nonlinear Kinetic Models of Plastic Fragmentation

Molecules, Journal Year: 2025, Volume and Issue: 30(10), P. 2235 - 2235

Published: May 21, 2025

Viscosimetric experiments and microscopy measurements on microdispersions of polycaprolactone (PCL) plastics showed an unexpected exponential decrease in viscosity over the first 3 months a plateau for further 4 observations. This behavior is due to release nanoplastics from semicrystalline particles that reduce dispersion, leave stable fine crystalline microplastics ranging size 30 180 μm. The development nonlinear kinetic models fragmentation process macro- meso-, micro-, reveals complex we call cracking–leaching mechanism. autocatalytic mechanical cracking macroplastics larger than 5 mm followed by logistic-type mesoplastics between 1 mm. Therefore, smaller experience leaching diffusion modeled via coupled differential equations: quickly amorphous fraction, microplastics. proposed mechanism explains distribution floating plastic debris oceans, with gap Considering outcome, general reflection made critical issues currently appear unsolvable regarding pollution.

Language: Английский

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Dual mobilization of buried microplastics and organic carbon driven by seagrass degradation: a case study from Swan Lake, China

Frontiers in Marine Science, Journal Year: 2025, Volume and Issue: 12

Published: May 29, 2025

Seagrass beds are significant sinks for microplastics. However, the degradation of seagrass poses challenges, and evidence regarding its impacts on microplastic remains scarce. In this study, sediment cores were collected to investigate stock composition, carbon, organic carbon in Zostera japonica bed adjacent degraded area a lagoon Swan Lake, China. The (84.5 ± 18.5 million particles ha -1 ) was found significantly higher than (51.8 0.6 ), resulting release 38.7% buried microplastics reactivated water column. Similarly, 30.0% 66.1% total eroded due degradation. stocks derived from estimated at 0.19 0.10 kg C 0.13 0.11 area, contributing minimally (0.0023% 0.0026%, respectively). Notably, within single year may trigger rapid erosion over 20 years Lake. A linear relationship observed between contents (Organic = 1990 + 35100 × Microplastic R² 0.26, p < 0.001). Microplastics sediments predominantly fiber (48.1%), black (40.7%), 250–500 µm (47.0%) while plate (26.7%), blue transparent, each 26.7% 125–250 (38.2%) bed. not only reduce but also alter their composition. This study initially quantified contribution underscored urgent need conservation mitigate climate change prevent remobilization historically

Language: Английский

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Towards harmonized ecotoxicological effect assessment of micro- and nanoplastics in aquatic systems

Environmental Pollution, Journal Year: 2024, Volume and Issue: 366, P. 125504 - 125504

Published: Dec. 9, 2024

Micro- and nanoplastics are globally important environmental pollutants. Although research in this field is continuously improving, there a number of uncertainties, inconsistencies methodological challenges the effect assessment micro- nanoparticles freshwater systems. The current understanding adverse effects partly biased by use non-relevant particle types, unsuitable test setups environmentally unrealistic dose metrics, which does not take into account realistic processes uptake consequent effects. Here we summarize state art compiling most recent with aim to highlight gaps further necessary steps towards more harmonized testing In particular, ecotoxicological scenarios need mirror diversity bioavailability. Harmonized should include different pathways, exposures comparisons natural reference particles. Effect assessments differentiate direct physical effects, such as lesions toxicity caused polymer, from indirect alterations ambient conditions leaching, change turbidity, food dilution organisms' behavior. Implementation these suggestions can contribute harmonization effective, evidence-based nanoplastics.

Language: Английский

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Experimental inconsistencies undermine accurate characterization of microplastics and identification of environmental drivers:a metadata analysis in Chinese aquatic environment

Ecological Indicators, Journal Year: 2024, Volume and Issue: 170, P. 113053 - 113053

Published: Dec. 28, 2024

Language: Английский

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