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61,005 resultsShowing papers similar to Microplastics as adsorbent for Pb2+ and Cd2+: A comparative study of polypropylene, polyvinyl chloride, high-density polyethylene, and low-density polyethylene
ClearThe potential of microplastics as carriers of metals
Five types of microplastics were tested for their ability to adsorb heavy metals (Cd, Co, Cr, Cu, Ni, Pb, Zn) in different water matrices, finding significant adsorption of lead, chromium, and zinc—especially on polyethylene and PVC—with surface area and porosity as key drivers. The study identifies microplastics as potential vectors for heavy metal transport and transfer through aquatic food chains.
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.
Adsorption 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 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.
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.
Adsorption of Cadmium, Copper and Lead on Polypropylene and Polyethylene Microplastics
This laboratory study measured how cadmium, copper, and lead adsorb onto polypropylene and polyethylene microplastic particles in seawater, finding that microplastics concentrate these toxic metals at levels well above surrounding water concentrations. The results reinforce concerns that microplastics act as carriers of heavy metal contamination in marine ecosystems.
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.
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.
Potential of Adsorption of Diverse Environmental Contaminants onto Microplastics
Researchers assessed the ability of four common types of microplastics to adsorb hazardous environmental contaminants including dyes and heavy metals. They found that dyes were adsorbed through physical processes while heavy metal adsorption varied by plastic type, with polystyrene showing the highest capacity for certain metals. The study confirms that microplastics can act as vectors for diverse pollutants, potentially increasing the environmental mobility and bioavailability of toxic substances.
Study on the capability and characteristics of heavy metals enriched on microplastics in marine environment
Laboratory and field experiments examined heavy metal adsorption on five plastic types (PVC, PP, PE, PA, POM), finding that PVC and PP had the highest adsorption capacity for lead and manganese, with field results showing that PP adsorbed metals at concentrations orders of magnitude higher than co-adsorbed PAHs. The study provides direct comparative data on microplastic-metal interactions across polymer types in marine environments.
Preferential adsorption of Cd, Cs and Zn onto virgin polyethylene microplastic versus sediment particles
Polyethylene microplastics preferentially adsorb the heavy metals cadmium, cesium, and zinc compared to natural sediment particles. This means microplastics may act as concentrated vectors for toxic metals in marine environments, increasing exposure risks for organisms that ingest them.
Adsorption behavior of heavy metals onto microplastics derived from conventional and biodegradable commercial plastic products
Researchers tested how well different types of microplastics, including both conventional and biodegradable plastics, absorb heavy metals like lead, nickel, copper, zinc, and cadmium from water. They found that all microplastic types could pick up significant amounts of heavy metals, with biodegradable plastics sometimes absorbing even more than conventional ones. This is concerning because microplastics carrying heavy metals could deliver a double dose of contamination to organisms that ingest them.
[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.
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.
Microplastic and heavy metal interactions (adsorption and desorption) at different salinities
Researchers examined adsorption and desorption of heavy metals (Pb, Cu, Zn) onto polypropylene, polyethylene, and other microplastic types at varying concentrations and salinities, finding PP particles absorbed the most metal but also released it most slowly compared to other polymers.
Kinetics and Size Effects on Adsorption of Cu(II), Cr(III), and Pb(II) Onto Polyethylene, Polypropylene, and Polyethylene Terephthalate Microplastic Particles
Researchers investigated how copper, chromium, and lead ions adsorb onto polyethylene, polypropylene, and PET microplastic particles of different sizes. The study found that smaller microplastic particles had greater adsorption capacity for heavy metals, with lead showing the highest adsorption levels, particularly on PET particles, suggesting increased environmental risk when tiny microplastics and heavy metals coexist.
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.
Microplastics inhibit lead binding to sediment components: Influence of surface functional groups and charge environment
Researchers systematically investigated interactions among lead, polystyrene microplastics, and sediment components to understand how microplastics affect heavy metal behavior in aquatic environments. The study found that polystyrene significantly inhibited lead adsorption to sediment by competing for binding sites, reducing lead uptake by up to 28%, which suggests that microplastics could increase the mobility of toxic metals in contaminated waterways.
Hazardous microplastic characteristics and its role as a vector of heavy metal in groundwater and surface water of coastal south India
Researchers conducted the first baseline study of microplastics in groundwater and surface water along coastal south India and tested how different plastic polymers absorb heavy metals. They found microplastics at concentrations up to 19.9 particles per liter, with polypropylene showing the highest capacity to adsorb toxic metals like cadmium and manganese. The findings suggest microplastics may act as significant carriers of heavy metals through water systems, raising concerns about contamination of drinking water sources.
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.
Coexistence and Adsorption Properties of Heavy Metals by Polypropylene Microplastics
Researchers analysed the adsorption of lead, copper, cadmium, and zinc onto polypropylene microplastics using scanning electron microscopy, FTIR, and X-ray photoelectron spectroscopy, elucidating the coexistence and adsorption mechanisms by which microplastics act as carriers of heavy metal pollutants.
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.
Competitive adsorption of lead and cadmium onto nanoplastics with different charges: Two-dimensional correlation spectroscopy study
Researchers investigated how nanoplastics with different surface charges compete to adsorb the heavy metals lead and cadmium, finding that negatively charged nanoplastics bound more of both metals and that lead consistently outcompeted cadmium for binding sites. These results reveal that the surface chemistry of nanoplastics shapes their capacity to carry toxic metals through the environment, with implications for combined heavy-metal and nanoplastic risk in aquatic ecosystems.
Characterization of polyethylene and polyurethane microplastics and their adsorption behavior on Cu2+ and Fe3+ in environmental matrices
Researchers characterized polyethylene and polyurethane microplastics and measured their ability to adsorb heavy metals, finding that both types can bind copper and iron ions from water — raising concern that microplastics may act as carriers that transport toxic metals deeper into aquatic ecosystems and food chains.