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20 resultsShowing papers similar to Reframing microplastics as a ligand for metals reveals that water quality characteristics govern the association of cadmium to polyethylene
ClearAdsorption characteristics of cadmium onto microplastics from aqueous solutions
Laboratory adsorption experiments characterized how cadmium is taken up by microplastics of different polymer types from aqueous solutions, finding adsorption capacity varied significantly with polymer chemistry, particle size, and solution conditions. The results help predict how microplastics in contaminated waterways accumulate and transport cadmium, a highly toxic heavy metal.
Adsorption mechanism of cadmium on microplastics and their desorption behavior in sediment and gut environments: The roles of water pH, lead ions, natural organic matter and phenanthrene
Researchers compared how cadmium adsorbs onto five different microplastic types and then desorbs in simulated sediment and gut environments, finding that pH, competing ions, natural organic matter, and co-pollutants like phenanthrene all significantly alter how much cadmium is released.
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.
Sorption properties of cadmium on microplastics: The common practice experiment and A two-dimensional correlation spectroscopic study
Laboratory experiments examined how cadmium adsorbs onto microplastics of different polymer types and aging states, finding that surface chemistry and weathering significantly affect how much heavy metal the plastics can carry. This matters because microplastics contaminated with heavy metals represent a dual pollution risk when ingested by aquatic organisms.
[Effects of Aging on the Cd Adsorption by Microplastics and the Relevant Mechanisms].
This study examined how aging affects the ability of microplastics — including polyethylene and polystyrene — to adsorb the heavy metal cadmium. Weathered microplastics showed different adsorption behavior than virgin particles, which has implications for how microplastics transport toxic metals through aquatic environments.
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.
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.
Comparative assessment of cadmium(II) carrier-effects derived by polyethylene microplastics with heterogeneous sources
This study investigated whether the source of polyethylene microplastics — bottles, industrial powder, or packaging bags — affects how well they carry the toxic heavy metal cadmium in the environment. Using laboratory experiments, researchers found that source-related differences in surface chemistry meaningfully changed how much cadmium each type of microplastic absorbed and transported, especially as environmental conditions like pH shifted. The findings suggest that treating all microplastics as identical in pollution models may underestimate the real risk in areas dominated by specific plastic waste types.
Adsorption of lead(II) onto PE microplastics as a function of particle size: Influencing factors and adsorption mechanism
Researchers studied how lead ions attach to polyethylene microplastics of different sizes in water. They found that smaller microplastic particles had greater capacity to adsorb lead, primarily through chemical bonding mechanisms like hydrogen bonding and surface complexation. The findings suggest that microplastics in the environment can act as carriers for toxic heavy metals, with smaller particles posing a greater risk.
Evaluating the role of microplastics as a vector in metal cycling within the River Thames
Researchers characterized how microplastics in River Thames water adsorb toxic heavy metals, comparing adsorption capacity across different plastic types and water chemistry conditions. Microplastics consistently adsorbed metals including lead, cadmium, and copper, providing the first data on metal-binding capacity for Thames microplastics and supporting their role as carriers of inorganic pollutants in urban rivers.
Microplastics as adsorbent for Pb2+ and Cd2+: A comparative study of polypropylene, polyvinyl chloride, high-density polyethylene, and low-density polyethylene
Researchers compared how four common types of microplastics adsorb lead and cadmium heavy metals in aquatic environments. The study found that polypropylene had the highest adsorption capacity for both metals, with oxygen-containing functional groups playing a key role in the adsorption process, suggesting that different microplastic types pose varying levels of environmental risk as heavy metal carriers.
Study on the Adsorption Behavior of Cadmiumby the MPs and Its Environmental Factors
This study investigated how microplastics adsorb the toxic heavy metal cadmium under different environmental conditions including pH, temperature, and salinity. Microplastics were found to act as carriers for cadmium, potentially transporting this harmful metal into aquatic ecosystems and the food chain.
Investigation of Factors Affecting Metal Ion Desorption from the Surface of Microplastics
Laboratory experiments show that key environmental variables — pH, temperature, contact time, and polymer type — strongly influence how quickly metal ions desorb from microplastic surfaces into water. Because microplastics can concentrate and then release metals like lead and cadmium into food and drinking water, understanding these desorption parameters is critical for assessing the chemical hazard that microplastics pose beyond their physical presence.
Adsorption of three bivalent metals by four chemical distinct microplastics
Researchers measured the sorption of copper, cadmium, and lead onto four types of microplastic particles — including chlorinated PE, PVC, and two PE variants — finding that higher crystallinity and surface area drove greater metal adsorption, and that all four plastics had different capacities for each metal.
New insights into the decrease in Cd2+ bioavailability in sediments by microplastics: Role of geochemical properties
Researchers investigated how polyethylene terephthalate microplastics alter the geochemical properties of sediments in ways that reduce the bioavailability of cadmium. PET microplastics shifted cadmium from the readily exchangeable fraction to the organically bound fraction, and the associated changes in microbial activity and organic carbon explained much of the reduction in cadmium bioavailability.
Influence of cephalexin on cadmium adsorption onto microplastic particles in water: Human health risk evaluation
Researchers studied how the antibiotic cephalexin influences the adsorption of the toxic metal cadmium onto polyethylene microplastics in water. They found that smaller microplastic particles absorbed more cadmium, and that the combined presence of cadmium and microplastics poses health risks, particularly for children exposed through contaminated groundwater. The study provides evidence that microplastics can act as carriers for heavy metals, potentially increasing human exposure to toxic substances.
Sorption of Platinum and Palladium on Polyethylene Microplastics in Natural Water
Researchers studied for the first time how platinum and palladium metals adsorb onto polyethylene microplastics in natural lake water. The study found that both new and aged microplastics can accumulate these metals from water, even at very low concentrations, suggesting that microplastics could act as transport vectors for precious metals and pose risks to aquatic organisms.
Effects of virgin microplastics on the transport of Cd (II) in Xiangjiang River sediment
Six types of microplastics were found to change how cadmium (a toxic heavy metal) binds to and moves through river sediments. The presence of microplastics altered cadmium adsorption behavior, suggesting that plastics in river sediments can affect the mobility and bioavailability of co-occurring heavy metal pollutants.
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.
Sequential interfacial contributions of microplastics to microbial adhesion and metal adsorption
Researchers uncovered the mechanistic sequence of interactions between microplastics, microorganisms, and metals in aquatic environments, finding that microbial adhesion to microplastic surfaces precedes and facilitates subsequent metal adsorption through temporal interfacial processes.