Molecular mechanisms of microplastic toxicity in coastal sediments of La Guajira Colombia and emerging ecological risks

Case Studies in Chemical and Environmental Engineering, Год журнала: 2025, Номер unknown, С. 101108 - 101108

Опубликована: Янв. 1, 2025

Язык: Английский

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Impact of Humidity Variations at Different Distances from the Lake Surface on Rhizosphere Microbiota of Trifolium repens L.

Physiological and Molecular Plant Pathology, Год журнала: 2025, Номер 136, С. 102596 - 102596

Опубликована: Фев. 6, 2025

Язык: Английский

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Investigation of Nitrogen Conversion Efficiency in Hydrogen-based Autotrophic Nitrate Reduction Reactor

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Фев. 10, 2025

This study investigates the performance of a hydrogen-based membrane biofilm reactor (MBfR) for nitrogen transformation over an extended operational period exceeding 200 days. During monitoring, sustained highly alkaline conditions with pH consistently 11.20, while achieving ammonia conversion efficiency above 60% and maintaining nitrite accumulation rate below 1%. Integrated mass balance calculations microbial community profiling revealed coexistence denitrification dissimilatory nitrate reduction to ammonium (DNRA) pathways within network. A factorial experimental design was implemented hydraulic retention time (HRT) influent concentration as independent variables, generating nine distinct regimes through cross-variable permutations. Subsequent analysis extensive datasets enabled development Response Surface Methodology (RSM) model simulate dynamics. Model validation confirmed statistical reliability predictive accuracy RSM framework. Critical demonstrated that in hydrogen autotrophic system exhibited significant correlation individual variables themselves but showed negligible dependence on their interactive effects. These findings provide novel insights into process optimization strategies theoretical understanding convention.

Язык: Английский

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Carbon Cycling in Wetlands Under the Shadow of Microplastics: Challenges and Prospects

Toxics, Год журнала: 2025, Номер 13(3), С. 143 - 143

Опубликована: Фев. 20, 2025

Wetlands are one of the most crucial ecosystems for regulating carbon sequestration and mitigating global climate change. However, disturbance to dynamics caused by microplastics (MPs) in wetlands cannot be overlooked. This review explores impacts MPs on cycles within wetland ecosystems, focusing underlying physicochemical microbial mechanisms. The accumulation sediments can severely destabilize plant root functions, disrupting water, nutrient, oxygen transport, thereby reducing biomass development. Although may temporarily enhance storage, they ultimately accelerate mineralization organic carbon, leading increased atmospheric dioxide emissions undermining long-term sequestration. A critical aspect this process involves shifts community structures driven selective colonization MPs, which affect decomposition methane production, thus posing a threat greenhouse gas emissions. Notably, dissolved matter derived from biodegradable promote photoaging coexisting enhancing release harmful substances aged further impacting microbial-associated due disrupted metabolic activity. Therefore, it is imperative deepen our understanding adverse effects mechanisms health cycles. Future strategies should incorporate regulation ecological engineering techniques develop effective methodologies aimed at maintaining sustainable capacity affected MP contamination.

Язык: Английский

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Insights into soil microbial assemblages and nitrogen cycling function responses to conventional and biodegradable microplastics

Journal of Hazardous Materials, Год журнала: 2025, Номер 491, С. 137889 - 137889

Опубликована: Март 10, 2025

Язык: Английский

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Natural abundance isotope techniques offer a key to better deciphering the impact of microplastics on the nitrogen cycle

Frontiers in Marine Science, Год журнала: 2025, Номер 12

Опубликована: Март 11, 2025

As human activities intensify, ecosystems are constantly being polluted by microplastics, which may change the microbe-driven nitrogen cycling and associated nitrous oxide emissions therein. However, exact impact of microplastics on specific processes remains to be clarified, limiting accurate assessments production. Additionally, a gap in our understanding isotopic dynamics under restricts deeper insights into microplastic-polluted environments. Accordingly, this study represents first integration natural abundance isotope techniques with microcosm experiments involving various offering novel approach for detailed investigation impacts cycle their potential role regulating Our results suggest that different sizes (0.02 mm, 0.1 1 mm) polymer types (polypropylene, polyvinyl chloride, polyamide, polyethylene) both nitrite production consumption, highlighting important size these processes. Particularly, dual signatures help identify impacted microplastics. More importantly, evidence indicates lost from environment primarily reduction gaseous products or dinitrogen polyethylene especially largest-size polyamide treatments. Conversely, polypropylene treatment, at large sizes, promote oxidation, thus retaining more within environment. findings offer new paradigm comprehensive assessment highlight importance considering when assessing greenhouse gas emissions, context increasing microplastic pollution.

Язык: Английский

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Investigation of nitrogen conversion efficiency in hydrogen-based autotrophic nitrate reduction reactor

Journal of Water Process Engineering, Год журнала: 2025, Номер 72, С. 107536 - 107536

Опубликована: Март 22, 2025

Язык: Английский

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Typical migration patterns and fates of microplastics with varying properties in bays and their impacts on coastal ecologically sensitive areas

Water Research, Год журнала: 2025, Номер 282, С. 123635 - 123635

Опубликована: Апрель 12, 2025

Язык: Английский

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Metagenomic analysis unveiled the response of microbial community and antimicrobial resistome in natural water body to duck farm sewage

Environmental Pollution, Год журнала: 2024, Номер 361, С. 124784 - 124784

Опубликована: Сен. 2, 2024

Язык: Английский

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