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61,005 resultsShowing papers similar to Characterizing the binding interactions between virgin/aged microplastics and catalase in vitro
ClearEvidence of microplastics release from polythene and paper cups exposed to hot and cold: A case study on the compromised kinetics of catalase
Researchers found that both polythene bags and paper cups release microplastic particles when exposed to hot and cold water at various time intervals. The study demonstrated that these released microplastics can bind to and alter the structure of the antioxidant enzyme catalase, reducing its enzymatic activity by approximately 1.4-fold, suggesting that everyday plastic-containing materials may release particles that interfere with biological processes.
Spectroscopic investigations on the interaction between nano plastic and catalase on molecular level
Researchers investigated how polystyrene nanoplastics interact with the enzyme catalase at different pH levels, finding that nanoplastics alter the protein's secondary structure and reduce its enzymatic activity through static quenching and hydrophobic binding mechanisms.
Probing the molecular mechanism of interaction between polystyrene nanoplastics and catalase by multispectroscopic techniques
Researchers investigated the molecular mechanism of interaction between polystyrene nanoplastics and the antioxidant enzyme catalase using multispectroscopic techniques, revealing how nanoplastic accumulation may disrupt enzymatic function and contribute to oxidative stress.
Enhanced binding of triclocarban to catalase induced by coexisting nanoplastics
Researchers showed that polystyrene nanoplastics worsen the binding of the antimicrobial compound triclocarban to the antioxidant enzyme catalase by forming a protein corona on the nanoplastic surface and distorting the enzyme's 3D structure, leading to greater-than-expected overactivation of catalase activity and heightened oxidative stress compared to triclocarban exposure alone.
Sulfide- and UV-induced aging differentially affect contaminant-binding properties of microplastics derived from commercial plastic products
Researchers found that sulfide- and UV-induced aging of microplastics differentially alter their ability to bind environmental contaminants, with sulfide treatment particularly enhancing chromium adsorption through thiol group formation and both processes increasing PET adsorption capacity through particle flattening.
Role of UV radiation and oxidation on polyethylene micro- and nanoplastics: impacts on cadmium sorption, bioaccumulation, and toxicity in fish intestinal cells
This study examined how UV aging and oxidation change the way polyethylene micro and nanoplastics interact with cadmium, a toxic heavy metal, in fish gut cells. While the plastics actually reduced cadmium absorption and toxicity in the cells, UV aging changed the particles' surface chemistry and caused them to clump together differently. The results suggest that the interaction between microplastics and heavy metals in the environment is complex and depends on how weathered the plastic is.
Influence of aging on the affinity between microplastics and organic contaminants
Researchers investigated how UV and UV+H2O2 aging affects the capacity of polystyrene microplastics to adsorb and release pesticides and other organic contaminants, finding that aging-induced surface changes significantly altered adsorption affinity and desorption behavior compared to unaged controls.
Study on the binding of polystyrene microplastics with superoxide dismutase at the molecular level by multi-spectroscopy methods
Researchers used multiple spectroscopy methods to study how polystyrene microplastics interact with the antioxidant enzyme superoxide dismutase (SOD) at the molecular level. The study found that microplastics altered SOD's protein structure, forming larger complexes and increasing the enzyme's activity in a concentration-dependent manner, providing insights into how microplastics may affect biological antioxidant systems.
Contaminant release from aged microplastic
Researchers exposed recycled plastic granules of polyethylene, PVC, and polystyrene to simulated aging conditions including UV radiation and high temperatures. They found that aging significantly increased the rate at which chemical additives leached from the plastic particles into water, with UV exposure having the greatest effect. The study highlights that weathered microplastics in the environment may release harmful chemicals at much higher rates than fresh plastic materials.
Size-dependent effects of nanoplastics on structure and function of superoxide dismutase
Researchers used multi-spectroscopic techniques to examine how nanoplastics of different sizes interact with and alter the structure and function of the antioxidant enzyme superoxide dismutase. The study found size-dependent effects, with nanoplastics binding to the enzyme and altering its secondary structure, ultimately reducing its activity, which has implications for understanding how nanoplastics may disrupt cellular antioxidant defenses.
Elucidating the characteristic of leachates released from microplastics under different aging conditions: Perspectives of dissolved organic carbon fingerprints and nano-plastics
Researchers investigated how different aging conditions affect the release of dissolved organic carbon and nanoplastics from PVC and polystyrene microplastics over 130 days. The study found that UV aging and high temperatures promoted the release of nanoplastics and altered the chemical characteristics of leached substances, with UV-aged treatments producing smaller, rougher nanoparticles that may pose greater ecological risks.
Molecular interaction of pristine and photoaged polylactic acid microplastics with extracellular polymeric substances from Microcystis aeruginosa
Researchers investigated how pristine and UV-aged polylactic acid microplastics interact with extracellular polymeric substances produced by the cyanobacterium Microcystis aeruginosa. They found that aging enhanced the interaction between the microplastics and these biological substances, primarily through hydrogen bonding, leading to greater surface changes and molecular weight reduction. The study suggests that aged biodegradable microplastics may be more susceptible to transformation in aquatic environments than pristine ones.
Accelerated aging of polyvinyl chloride microplastics by UV irradiation: Aging characteristics, filtrate analysis, and adsorption behavior
Researchers systematically investigated how UV irradiation ages polyvinyl chloride microplastics, characterizing changes in their physical and chemical properties and the organic matter they release. The study established quantitative relationships between the degree of aging and the capacity of microplastics to adsorb environmental pollutants like malachite green and sulfamethoxazole, providing a tool for predicting contaminant accumulation on weathered microplastics in natural environments.
Adsorption properties and mechanism of Cu(II) on virgin and aged microplastics in the aquatic environment
Researchers examined how UV aging changes the surface properties of polyamide and polylactic acid microplastics and affects their ability to adsorb copper ions in water. The study found that UV irradiation altered the physical and chemical characteristics of both plastic types, increasing their capacity to bind heavy metals. Evidence indicates that weathered microplastics may act as more effective carriers of heavy metal contaminants in aquatic environments compared to virgin plastics.
Probing the molecular interaction between photoaged polystyrene microplastics and fulvic acid
Researchers investigated how photoaged polystyrene microplastics interact with fulvic acid, a common natural organic compound found in water environments. Using advanced spectroscopy techniques, they found that aging changed the surface chemistry of the microplastics and altered how they bind to fulvic acid at the molecular level. The study suggests that weathering processes in the environment may significantly change how microplastics interact with and transport other dissolved substances in water.
Aging significantly increases the interaction between polystyrene nanoplastic and minerals
Researchers investigated how environmental aging by UV light and chemical oxidation changes the way polystyrene nanoplastics interact with mineral particles. They found that aging significantly increased the nanoplastics' ability to bind to common minerals like kaolinite and goethite. The study suggests that weathered nanoplastics in the environment may behave very differently from the pristine particles typically used in laboratory studies.
Effects of photoaged polystyrene microplastics and nanoplastics on the extracellular aggregation and intracellular accumulation of ZnO nanoparticles to algae
When microplastics weather in the environment under UV sunlight, they become more chemically reactive and change how they interact with other pollutants. This study found that photoaged polystyrene microplastics and nanoplastics had a stronger ability to bind zinc oxide nanoparticles than fresh plastic, and that this enhanced binding altered how the zinc nanoparticles affected green algae — generally reducing zinc uptake into algal cells but increasing overall ecological risk. The findings highlight that the environmental "aging" of microplastics is not merely cosmetic — it fundamentally changes their behavior as carriers of other toxic substances in aquatic ecosystems.
Unraveling Complexation and Contaminant Vector Potentialin Aged Polyamide-Heavy Metal Interactions
Researchers found that aged polyamide (PA) microplastics exhibited enhanced adsorption capacity for cadmium and copper compared to pristine PA, with increased surface roughness from aging promoting stronger metal binding via electrostatic interactions, and environmental factors such as pH influencing subsequent metal desorption.
Inhibiting the release of polyvinyl chloride nanoplastics via superoxide ion-induced self-flocculation during polyvinyl chloride microplastics degradation
Researchers developed a UV/sulfite treatment system to inhibit the release of polyvinyl chloride nanoplastics generated during PVC microplastic degradation. The superoxide ion-induced surface modification reduced nanoplastic shedding by altering PVC surface chemistry, offering a strategy to limit nanoplastic generation during plastic aging.
Surface characteristics and adsorption properties of polypropylene microplastics by ultraviolet irradiation and natural aging
This study examined how aging and UV light change the surface properties of polypropylene microplastics and their ability to absorb other pollutants. UV-aged microplastics absorbed significantly more of a common dye pollutant, while naturally aged particles absorbed less due to biological film buildup. Understanding how microplastics change over time in the environment matters because aged particles may carry different levels of harmful chemicals than fresh ones.
The Aging Behavior of Polyvinyl Chloride Microplastics by UV/Sodium Percarbonate Oxidation: Efficiency and Mechanism
Researchers investigated how UV-activated sodium percarbonate breaks down PVC microplastics, finding effective dechlorination and fragmentation after 35 hours of treatment. The study identified hydroxyl and carbonate radicals as the primary agents driving the aging process, providing insights into how advanced oxidation could be used to treat microplastic-contaminated wastewater.
Mechanistic insights into non-negligible toxicity evolution of microplastics under different aging processes
This review examines how different environmental aging processes, such as UV exposure, mechanical wear, and chemical weathering, change the physical and chemical properties of microplastics and alter their toxicity. Researchers found that aged microplastics and the chemicals they leach tend to be more harmful to organisms than fresh particles, causing growth inhibition and genetic damage. The findings suggest that the environmental risks of microplastics may increase significantly as they degrade over time.
Study on the Adsorption Behavior and Mechanism of Heavy Metals in Aquatic Environment before and after the Aging of Typical Microplastics
Researchers investigated the adsorption behavior and mechanisms of heavy metals by typical microplastics before and after environmental aging, finding that aging significantly alters microplastics' surface properties and capacity to bind metals such as cadmium and lead in aquatic systems.
Microplastic aging processes: Environmental relevance and analytical implications
Researchers reviewed how microplastics change physically and chemically over time in the environment — a process called 'aging' — and found that standard lab methods for detecting microplastics were mostly developed using fresh, unaged plastics, making it harder to accurately measure real-world contamination. Improved analytical methods that account for aged microplastics are needed for reliable environmental assessment.