Effect of Extracellular Polymeric Substance on Chlorella Vulgaris Exposed to Micro- and Nano-Plastics

Опубликована: Янв. 1, 2025

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Язык: Английский

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Algal secretion-driven microenvironment modulates copper transformation and impact: Significance of extracellular polymeric substances

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160776 - 160776

Опубликована: Фев. 1, 2025

Язык: Английский

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Ecological Concrete-Based Modular System for Heavy Metal Removal in Riparian Transition Zones: Design, Optimization and Performance Evaluation

Applied Sciences, Год журнала: 2025, Номер 15(7), С. 3721 - 3721

Опубликована: Март 28, 2025

This study presents the development and evaluation of an innovative modular ecological transition zone system for riparian restoration. Through systematic optimization, we developed a C25-grade concrete module (100 mm × 100 mm) with specialized cavity design (φ61 H60 that achieves optimal balance between structural integrity (20–30 MPa compressive strength) environmental functionality (>15% porosity, >1 10−4 cm s−1 permeability). The incorporates precisely calibrated proportions cement (378 kg m−3), reinforcing agent (12 aggregate (1650 water (137 L creating robust platform remediation. was evaluated at two scales: module-scale experiments in 25 containers (833:1 mL g−1 ratio) kinetic studies (10:1 ratio), revealing sophisticated three-phase removal process. initial rapid surface adsorption phase (0–4 h) achieved rates 0.28–0.42 mg h−1, followed by pore diffusion (4–24 chemical fixation phases, patterns effectively modeled using modified pseudo-second-order equation. demonstrated exceptional heavy metal capabilities across varying concentration ranges, achieving efficiencies 95.6% Pb2+ ions, 92.3% Cd2+ 84.2% Cr3+ 89.7% Cu2+ 84.8% Zn2+ ions under conditions. Performance remained orders magnitude maintaining above 80% both experimental scales. design’s cost-effectiveness is through material costs USD 45–60 m−3, operational 40–60% lower than conventional systems. research provides practical, cost-effective solution restoration, combining durability efficient pollutant while consistent performance

Язык: Английский

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Differential Mapping of Intracellular Metallic Nanoparticles and Ions and Dynamic Modeling Prediction

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Июнь 4, 2025

Predicting the toxicity of metallic nanoparticles (MNPs) remains a longstanding challenge in biomedical field, primarily due to unresolved dynamic transformation between pristine MNPs and their dissolved ionic counterparts within living systems. Herein, we develop an integrative bioimaging-mathematical framework that quantifies, real-time mode, contributions toxicity. By integrating aggregation-induced emission (AIE)-based confocal imaging with label-free scattered light tracking, achieve simultaneous noninvasive visualization different-sized silver, copper oxide, zinc oxide (Ag-, CuO-, ZnO-NPs, 20-100 nm) forms cells. This dual-modal approach reveals size-dependent intracellular dissolution dynamics, 2.68-34.7% internalized dissolving post uptake smaller particles releasing 1.08-1.22 times more ions than larger particles. Leveraging these spatiotemporal insights, developed cascading model mechanistically links extracellular dissolution, cellular uptake, transformation, pathways. The demonstrates species dominate across all MNPs, contributing 59.7-79.4% (AgNPs), 69.6-100% (CuO-NPs), 97.7% (ZnO-NPs) overall 0-100 mg/L. Strikingly, profiles vary by MNP type: AgNPs exhibit biphasic toxicity, CuO-NPs follow logistic-like pattern, ZnO-NPs remain entirely ion-driven. bridging bioimaging kinetic modeling, our provides first vivo quantitative resolution nanoparticle- versus ion-specific work not only advances mechanistic understanding behavior but also establishes universally applicable tool for predictive nanotoxicology, enabling safer design nanomaterials informed regulatory policies.

Язык: Английский

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Characterization of polyphenols and carbohydrates exuded by Phaeodactylum tricornutum diatom grown under Cu stress

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Апрель 23, 2024

This study is focused on analysing polyphenols and carbohydrates released by Phaeodactylum tricornutum (P. tricornutum) diatoms cultured in natural seawater enriched with sublethal lethal Cu doses. concentrations of 0.31, 0.79 1.57 µM reduced cell densities 37, 82 91%, respectively, compared to the control. The total sum all identified cells grown under levels increased up 18.8 107.4 times, data from a control experiment. Four different vitro assays were used estimate antioxidant activities extracellular compounds: 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical inhibition, cupric ion reducing capacity (CUPRAC), ferric power complexing ability (CCA). highest observed treatments, where CCA assay exhibited greater increase (up 32.2 times higher than that found experiment) reduce concentration free medium its toxicity. presence stimulated release as detoxification mechanism survive regulating speciation.

Язык: Английский

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Detoxification and removal of heavy metal by an acid-tolerant microalgae, Graesiella sp. MA1

Journal of Water Process Engineering, Год журнала: 2024, Номер 64, С. 105579 - 105579

Опубликована: Июнь 13, 2024

Язык: Английский

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The Role of Microalgae as Bioindicators of Aquatic Contamination

Environmental science and engineering, Год журнала: 2024, Номер unknown, С. 323 - 347

Опубликована: Янв. 1, 2024

Язык: Английский

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Dissecting the mechanism of synergistic interactions between Aspergillus fumigatus and the microalgae Synechocystis sp. PCC6803 under Cd(II) exposure: insights from untargeted metabolomics

Journal of Hazardous Materials, Год журнала: 2024, Номер 478, С. 135354 - 135354

Опубликована: Авг. 3, 2024

Язык: Английский

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Continuous Tuning of Fe‐O Covalency via Bioengineering for Facilitating Overall Water Splitting

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 30, 2024

Abstract The applications of Fe‐based electrocatalysts in oxygen evolution reactions (OER) and hydrogen (HER) are hindered due to poor stability catalytic activity originating from rapid Fe leaching the intrinsic electronic structure FeOOH. Here, study presents a strategy precisely continuously tune morphology FeOOH covalent characteristics Fe–O bonds by controlling coverage extracellular polymeric substances (EPS) on surface. Operando spectroscopy theoretical calculations reveal that regulating covalency induces changes intermediate adsorption strength metal leaching, leading volcano‐shaped trend durability as function covalency. Notably, HER, negatively charged sites EPS exhibit superior *H compared bare In particular, 2 @FeOOH exhibits excellent performance for both OER (η 10 = 240 mV) HER 52 mV), with outstanding over 200 hours at 100 mA cm⁻ . current density also reaches merely 1.51 V two‐electrode configuration, significantly surpassing other bifunctional electrocatalysts. This approach will provide promising pathway enhance water electrolysis through precise modulation coverage.

Язык: Английский

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Inhibition of zinc ions in sulfur-driven autotrophic denitrification process: What is the behavior of extracellular polymeric substances?

The Science of The Total Environment, Год журнала: 2024, Номер 946, С. 174269 - 174269

Опубликована: Июнь 25, 2024

Язык: Английский

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