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61,005 resultsShowing papers similar to Adsorption behaviour of accelerated UV aged PET and PP microplastics towards Pb(II) under varying pH, temperature, and salinity conditions
ClearEffect of light irradiation on heavy metal adsorption onto microplastics
Researchers investigated how UV light irradiation of polypropylene microplastics affected their adsorption of lead (Pb) from water, finding that photo-weathering increased surface oxidation and significantly enhanced heavy metal adsorption capacity.
Enhancement of Pb(II) adsorption by aged polyethylene terephthalate microplastics in the presence of microalgae: kinetic and mechanistic
UV, permanganate, and alkaline aging treatments all increased PET microplastic adsorption capacity for lead, and Microcystis aeruginosa microalgae further enhanced Pb(II) adsorption by coating PET surfaces with organic matter, demonstrating how environmental aging and biofouling amplify MP-metal interactions.
Investigation of the adsorption behavior of Pb(II) onto natural-aged microplastics as affected by salt ions
Researchers found that naturally aged microplastics adsorb significantly more lead than virgin microplastics, and that calcium chloride in solution strongly inhibits lead adsorption, indicating that environmental weathering and water chemistry alter contaminant transport.
Adsorption of Pb(II) by UV-aged microplastics and cotransport in homogeneous and heterogeneous porous media
Researchers found that microplastics aged by UV sunlight are better at absorbing and carrying lead (a toxic heavy metal) through soil and water than fresh microplastics. The aging process changes the microplastic surface in ways that make it grab onto more lead, potentially spreading this toxic metal further through the environment. This is relevant to human health because aged microplastics in the real world may be transporting more heavy metals into water supplies and food-growing soil than previously thought.
Enhancement of Pb(II) Adsorption by Aged Microplastics in the Presence of Microalgae: Kinetic and Mechanistic
Researchers investigated how UV light, potassium permanganate, and sodium hydroxide aging treatments affect lead (Pb(II)) adsorption by PET microplastics, and examined the additional influence of the microalga Microcystis aeruginosa. Aging increased adsorption capacity through greater surface functional groups and porosity, while microalgae further enhanced Pb(II) uptake via extracellular polymeric substances, suggesting that algal presence amplifies microplastics as heavy metal carriers in aquatic environments.
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.
The effect of UV exposure on conventional and degradable microplastics adsorption for Pb (II) in sediment
Researchers studied how UV aging affects the ability of conventional polyethylene and degradable polylactic acid microplastics to adsorb lead ions from aquatic sediment. They found that UV aging increased the surface area and oxygen content of both plastic types, enhancing their capacity to adsorb heavy metals. The study suggests that weathered microplastics in the environment may be more effective carriers of heavy metal contamination than pristine particles.
Metal adsorption by microplastics in aquatic environments under controlled conditions: exposure time, pH and salinity
Scientists systematically varied pH, salinity, and exposure time during metal adsorption experiments on different microplastic types, finding that pH had the greatest influence on metal uptake, with higher pH favoring adsorption of copper, lead, and cadmium onto most tested polymers.
Adsorption behavior of Cu(II) on UV-aged polyethylene terephthalate and polypropylene microplastics in aqueous solution
Researchers studied how UV aging changes the ability of PET and polypropylene microplastics to adsorb copper ions from water. UV exposure altered the surface properties of both plastics, increasing their capacity to bind heavy metals compared to pristine particles. The findings suggest that weathered microplastics in the environment may be more effective at concentrating toxic metals, potentially increasing ecological risks in contaminated waterways.
Mechanism analysis of heavy metal lead captured by natural-aged microplastics
The mechanism by which naturally aged microplastics capture lead (Pb(II)) from aqueous solution was investigated by comparing pristine and aged particles. Aged microplastics adsorbed more Pb(II) than pristine ones, with weathering-induced surface oxidation and increased oxygen-containing functional groups driving the enhanced metal capture capacity.
The adsorption behavior of metals in aqueous solution by microplastics effected by UV radiation
Virgin and UV-aged PET microplastics were compared for their sorption capacity of copper and zinc ions, with aged microplastics showing higher adsorption due to increased surface area and oxygen-containing functional groups formed during photoaging. The study demonstrates that environmental weathering enhances the metal-carrying potential of microplastics over time.
The interfacial interaction between typical microplastics and Pb2+ and their combined toxicity to Chlorella pyrenoidosa
Researchers found that microplastics in freshwater can absorb lead (a toxic heavy metal) onto their surfaces, especially after being weathered by UV light. When combined, the microplastics and lead were more toxic to freshwater algae than either pollutant alone, with PET plastic showing the highest capacity to bind lead. This means microplastics in rivers and lakes may concentrate heavy metals and deliver higher doses of toxins to aquatic life and potentially to people through the water supply.
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.
Pb(II) uptake onto nylon microplastics: Interaction mechanism and adsorption performance
Researchers investigated how aged nylon microplastics adsorb lead(II) ions from water, finding that surface weathering increased adsorption capacity and that the process followed pseudo-second-order kinetics. The study clarifies the mechanism by which microplastics can act as vectors for heavy metal contamination in aquatic environments.
Unraveling the adsorption behavior of Zn(II) on UV-aged PET and PP microplastics: kinetic and isotherm analyses
This study examined how UV aging changes the ability of PET and polypropylene microplastics to adsorb zinc from water. Researchers found that UV exposure over 30 days increased surface roughness and oxygen-containing functional groups on the plastics, significantly enhancing their capacity to bind zinc ions, which suggests that weathered microplastics in the environment may carry higher concentrations of heavy metals.
Comparative analysis of kinetics and mechanisms for Pb(II) sorption onto three kinds of microplastics
The sorption kinetics and mechanisms of lead (Pb(II)) onto three types of microplastics were compared to understand how plastic debris concentrates heavy metals in aquatic environments. The study found polymer-specific differences in sorption capacity and mechanism, with implications for how microplastics alter the distribution and bioavailability of lead in contaminated water.
UV-Irradiation Facilitating Pb Release from Recycled PVC Microplastics
Researchers found that UV light exposure causes microplastics made from recycled PVC to release lead (Pb), a toxic heavy metal used as a stabilizer in older PVC formulations. This shows that environmental weathering of plastic pollution can release hazardous chemical additives into water and soil.
Increased Cu(II) Adsorption Onto UV-Aged Polyethylene, Polypropylene, and Polyethylene Terephthalate Microplastic Particles in Seawater
Researchers found that UV aging significantly increased copper(II) adsorption onto polyethylene, polypropylene, and polyethylene terephthalate microplastics in seawater by up to 2.92 times after 12 months, with oxidation-induced surface changes and smaller particle sizes amplifying this effect for PP and PET.
Insights Into the Adsorption Behavior of Polyethylene Microplastics Towards Lead(II) Ions
Researchers investigated the adsorption behavior of lead(II) ions onto polyethylene microplastics in freshwater environments by systematically varying initial Pb(II) concentration, pH, and residence time, using scanning electron microscopy and other characterization methods to elucidate the interaction dynamics and sorption mechanisms between this common metal contaminant and microplastic surfaces.
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.
Microplastics aged in various environmental media exhibited strong sorption to heavy metals in seawater
Researchers aged six types of microplastics — including polyamide and PET — in different environments and then measured their adsorption of heavy metals in seawater, finding that aging consistently increased metal sorption capacity and that environmental medium during aging strongly influenced the degree of surface modification.
Effects of particle size and aging on heavy metal adsorption by polypropylene and polystyrene microplastics under varying environmental conditions
This study found that smaller and weathered microplastics absorb significantly more lead and copper from water than larger or newer particles. Since microplastics in the real world are constantly aging and breaking into smaller pieces, they may become increasingly effective at concentrating toxic metals that can then enter the food chain and potentially affect human health.
[Adsorption Characteristics of Arsenic on UV-aged Polypropylene Microplastics in Aqueous Solution].
This study examined how UV weathering (aging) changes the ability of polypropylene microplastics to adsorb arsenic from water, finding that aged plastic had rougher surfaces and more oxygen-containing groups, which enhanced arsenic adsorption. Environmental factors like pH and dissolved organic matter also influenced how much arsenic stuck to the plastic. Because aged microplastics bind more arsenic, they could carry this toxic heavy metal into aquatic food webs more effectively than pristine plastic particles.
Microplastics as a vehicle of heavy metals in aquatic environments: A review of adsorption factors, mechanisms, and biological effects
This review summarizes how microplastics in water can absorb and carry toxic heavy metals like lead and cadmium, making them more dangerous to aquatic life than either pollutant alone. Environmental factors such as water acidity, salinity, and organic matter influence how much metal sticks to microplastic surfaces. Since contaminated seafood is a major source of human exposure, understanding these interactions is important for assessing health risks.