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20 resultsShowing papers similar to Aging amplifies synergistic adsorption and reduction of Cr(VI) by polyamide microplastics
ClearMicroplastics as an emerging vector of Cr(VI) in water: Correlation of aging properties and adsorption behavior
Researchers studied the correlation between aging properties and adsorption of hexavalent chromium Cr(VI) onto polyethylene microplastics under accelerated UV aging conditions, finding that aging-induced changes in surface chemistry increased the adsorption capacity. Aged microplastics may act as more effective vectors for toxic heavy metals in aquatic environments.
Adsorption behaviour of microplastics on the heavy metal Cr(VI) before and after ageing
Researchers studied how UV aging affects the adsorption of hexavalent chromium onto PE, PS, and PA microplastics, finding that aged microplastics had significantly enhanced adsorption capacity due to increased surface area and functional group changes from weathering.
Polyamide microplastics as better environmental vectors of Cr(VI) in comparison to polyethylene and polypropylene microplastics
Researchers found that polyamide microplastics adsorb more hexavalent chromium (Cr(VI)) than polyethylene or polystyrene microplastics, with UV aging increasing adsorption capacity, making polyamide particles potentially more dangerous environmental vectors for this toxic heavy metal.
Adsorption and Desorption Behavior of Cr(VI) on Two Typical UV-Aged Microplastics in Aqueous Solution
Researchers examined how UV weathering changes the ability of two common microplastic types (polyethylene and polystyrene) to adsorb and release chromium(VI) from contaminated water. UV aging altered surface chemistry and significantly increased adsorption capacity for the toxic heavy metal.
Adsorption mechanism of hexavalent chromium on electron beam-irradiated aged microplastics: Novel aging processes and environmental factors
Researchers used electron beam irradiation as a novel method to age polypropylene microplastics and then studied how these aged particles adsorb hexavalent chromium from water. They found that aging dramatically increased the microplastics' ability to bind chromium by generating oxygen-containing functional groups on their surfaces. The study highlights that weathered microplastics in the environment may have a significantly greater capacity to concentrate heavy metal pollutants than fresh plastic particles.
Aged Polystyrene Microplastics Accelerate the Photo-Reduction of Chromium(VI)
Researchers investigated how aged polystyrene microplastics interact with hexavalent chromium, a toxic heavy metal, in water under light conditions. They found that microplastics accelerate the conversion of toxic chromium(VI) to less harmful chromium(III), while the chromium in turn speeds up the aging of the microplastics. The study reveals a complex interplay between microplastics and heavy metals in aquatic environments that could influence the environmental fate of both pollutants.
Comparison of Hexavalent Chromium Adsorption Behavior on Conventional and Biodegradable Microplastics
Researchers compared hexavalent chromium adsorption behavior on conventional versus biodegradable microplastics, finding that polymer chemistry and surface aging significantly affect chromium binding capacity and the risk of co-transport in contaminated environments.
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.
Interaction characteristics and mechanism of Cr(VI)/Cr(III) with microplastics: Influence factor experiment and DFT calculation
Researchers investigated how two types of microplastics, polyamide and polyethylene, interact with toxic chromium in different forms across various environmental conditions. They found that polyamide had a much higher capacity to adsorb both forms of chromium, and that environmental factors like pH, temperature, and salinity significantly influenced the interaction. The study provides insights into how microplastics may affect the transport and toxicity of chromium contamination in the environment.
Aging properties of polyethylene and polylactic acid microplastics and their adsorption behavior of Cd(II) and Cr(VI) in aquatic environments
Researchers compared how polyethylene and polylactic acid (PLA) microplastics age in the environment and how that aging affects their ability to absorb heavy metals like cadmium and chromium from water. They found that aging changed the surface chemistry of both plastic types, increasing their capacity to pick up these toxic metals. The findings matter because aged microplastics in the environment may concentrate and transport more pollutants than fresh plastic particles.
The photo-redox of chromium regulated by microplastics (MPs) and MPs-derived dissolved organic matter (MPs-DOM) and the CO2 emission of MPs-DOM
Researchers found that microplastics and their derived dissolved organic matter regulate the photo-redox transformation of chromium in wastewater, with UV exposure converting less toxic Cr(III) to more hazardous Cr(VI) while microplastic-derived organic matter influences this process and contributes to CO2 emissions.
The mechanism for adsorption of Cr(VI) ions by PE microplastics in ternary system of natural water environment
Researchers investigated how polyethylene microplastics adsorb hexavalent chromium (Cr(VI)) from water in the presence of the surfactant sodium dodecyl benzene sulfonate (SDBS), finding that SDBS enhanced Cr(VI) adsorption at pH below 6 but competed with chromate ions for adsorption sites at pH above 6. Increasing PE microplastic dosage raised Cr(VI) adsorption capacity substantially, providing mechanistic insight into pollutant co-transport on microplastics in natural water systems.
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.
Polystyrene microplastics reduce Cr(VI) and decrease its aquatic toxicity under simulated sunlight
Researchers discovered that polystyrene microplastics can reduce toxic Cr(VI) to less harmful Cr(III) under simulated sunlight, decreasing chromium's aquatic toxicity and revealing an unexpected role of microplastics in contaminant transformation.
Unraveling Complexation and Contaminant Vector Potential in Aged Polyamide-Heavy Metal Interactions
Researchers found that heat-aged polyamide microplastics exhibit enhanced adsorption capacity for cadmium and copper compared to virgin material, with copper showing higher adsorption efficiency due to its smaller hydrated ionic radius and strong coordination with oxygen- and nitrogen-containing surface groups on the aged polymer.
Sorption Behavior, Speciation, and Toxicity of Microplastic-Bound Chromium in Multisolute Systems
Researchers investigated how UV filters affect chromium sorption and toxicity on polystyrene microplastics, finding that UV irradiation and co-contaminants alter metal speciation and increase the ecological risk of microplastic-bound heavy metals.
The role of photooxidation and organic matter in Cr(III) and Cr(VI) interactions with poly(lactic acid) microplastics in aqueous solution
Researchers studied how UV exposure and organic matter influence the interaction between chromium and biodegradable poly(lactic acid) microplastics in water. They found that pristine PLA has low affinity for chromium, but the presence of organic matter like humic and tannic acids increased chromium adsorption by up to 620-fold, while UV-induced photooxidation of PLA also substantially enhanced adsorption. The study provides important insights into how environmental conditions alter the ability of biodegradable microplastics to transport heavy metals in aquatic systems.
Adsorption behavior of UV aged microplastics on the heavy metals Pb(II) and Cu(II) in aqueous solutions
Researchers examined how UV aging affects the adsorption of lead and copper onto polypropylene, polyethylene, and polystyrene microplastics, finding that aging creates new oxidation functional groups that enhance heavy metal adsorption capacity.
Aging mechanism of microplastics with UV irradiation and its effects on the adsorption of heavy metals
Researchers aged polystyrene microplastics using UV irradiation under three conditions (air, pure water, seawater) and found that aging changed surface chemistry and increased the microplastics' capacity to adsorb heavy metals, with seawater aging producing the most pronounced surface oxidation.
Adsorption behaviors of microplastics from packaging materials subjected to ultraviolet irradiation and microbial colonization
Researchers studied how UV irradiation and microbial colonization alter the surface properties of microplastics from discarded packaging materials and their ability to adsorb pollutants. They found that aging processes changed surface chemistry and hydrophilicity, affecting how microplastics interact with contaminants like crystal violet dye through hydrogen bonding, electrostatic attraction, and hydrophobic interactions.