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61,005 resultsShowing papers similar to Roles of polystyrene micro/nano-plastics as carriers on the toxicity of Pb2+ to Chlamydomonas reinhardtii
ClearNanoplastics increase the adverse impacts of lead on the growth, morphological structure and photosynthesis of marine microalga Platymonas helgolandica
Combined exposure to polystyrene nanoplastics and lead was found to have greater adverse effects on marine microalga Platymonas helgolandica growth, morphology, and photosynthesis than lead alone, indicating nanoplastics can amplify heavy metal toxicity in marine primary producers.
Combined toxic effects of polystyrene nanoplastics and lead on Chlorella vulgaris growth, membrane lipid peroxidation, antioxidant capacity, and morphological alterations
Researchers found that amino-functionalized polystyrene nanoplastics and lead act synergistically to inhibit the growth of the microalga Chlorella vulgaris, with combined exposure producing greater reductions in chlorophyll, biomass, and cell size than either pollutant alone.
The effect of polystyrene plastics on the toxicity of triphenyltin to the marine diatom Skeletonema costatum—influence of plastic particle size
The presence of polystyrene particles of different sizes was found to modify the toxicity of triphenyltin (a toxic organotin compound) to the marine diatom Skeletonema costatum, with effects depending on whether the plastic particles increased or decreased the bioavailability of the chemical. The study illustrates how microplastics can alter the toxicity of co-occurring chemical pollutants to sensitive marine microalgae.
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.
Investigation of the Migration Patterns for Nanoplastics With Different Sizes in Chlorella vulgaris and Their Effects on Heavy Metal Adsorption by the Microalgae
Scientists found that tiny plastic particles (nanoplastics) can get absorbed by algae, with smaller particles entering the algae cells while larger ones stick to the surface. These plastic particles change how the algae absorb toxic heavy metals like mercury, cadmium, and lead from water. This matters because it could affect how these dangerous metals move through the food chain and potentially reach humans who eat seafood or use algae-based products.
Influence of polystyrene microplastic and nanoplastic on copper toxicity in two freshwater microalgae
Researchers studied how polystyrene microplastics and nanoplastics affect the toxicity of copper to two freshwater microalgae species over extended exposure periods. They found that microplastics generally reduced copper toxicity by adsorbing copper ions, while nanoplastics had more variable effects depending on concentration and algal species. The study highlights that the size of plastic particles plays an important role in how they modify the bioavailability and toxicity of heavy metals in aquatic environments.
Effects of microplastic on arsenic accumulation in Chlamydomonas reinhardtii in a freshwater environment
Researchers found that polystyrene microplastics of two sizes disrupted phospholipid membrane structure in the microalga Chlamydomonas reinhardtii, reducing its ability to accumulate and detoxify arsenic in freshwater. Smaller 100 nm particles caused greater inhibition of arsenic uptake and the detoxification pathway than 5 µm particles, indicating that nanoplastic size amplifies toxicological impacts on arsenic biogeochemical cycling.
Unveiling the molecular mechanisms of size-dependent effect of polystyrene micro/nano-plastics on Chlamydomonas reinhardtii through proteomic profiling
Researchers used proteomic profiling to uncover the molecular mechanisms behind how different sizes of polystyrene micro- and nanoplastics affect the green alga Chlamydomonas reinhardtii. They found that particle size plays a critical role in determining the type and severity of biological responses in the algae. The study suggests that nanoscale plastic particles may pose distinct ecological risks compared to larger microplastics due to their ability to trigger different cellular stress pathways.
Nanoplastics increase algal absorption and toxicity of Cd through alterations in cell wall structure and composition
Lab experiments showed that polystyrene nanoplastics made freshwater algae more vulnerable to cadmium (a toxic heavy metal) by altering the structure of their cell walls, allowing more cadmium to enter the cells. This matters for human health because nanoplastics in waterways may increase how much toxic metal accumulates in aquatic food chains that eventually reach our plates.
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.
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.
Role of heteroaggregation and internalization in the toxicity of differently sized and charged plastic nanoparticles to freshwater microalgae
Researchers investigated how the size and surface charge of polystyrene nanoparticles affect their toxicity to freshwater microalgae. The study found that smaller and positively charged nanoparticles showed greater heteroaggregation with algal cells and higher internalization rates, leading to more pronounced toxic effects including reduced photosynthetic activity.
Different effecting mechanisms of two sized polystyrene microplastics on microalgal oxidative stress and photosynthetic responses
Researchers found that 1 micrometer polystyrene microplastics caused more oxidative stress and cell death in marine diatoms, while 0.1 micrometer particles caused greater light shading and pigment decline, revealing distinct size-dependent toxicity mechanisms.
Altered biotoxicity of cadmium to freshwater green algae by different concentrations of polystyrene
Polystyrene microplastics at low concentrations partially reduced cadmium toxicity to freshwater green algae, while higher concentrations exacerbated it, demonstrating that combined pollution effects on algae are concentration-dependent.
Toxicity of polystyrene microplastics in freshwater algae Scenedesmus obliquus: Effects of particle size and surface charge
Researchers investigated how polystyrene microplastics of different sizes and surface charges affect the freshwater algae Scenedesmus obliquus. The study found that smaller 1-micrometer particles caused greater oxidative stress, reduced photosynthetic effectiveness, and decreased membrane integrity compared to larger 12-micrometer particles, with effects being dose-dependent.
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.
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.
Are the primary characteristics of polystyrene nanoplastics responsible for toxicity and ad/absorption in the marine diatom Phaeodactylum tricornutum?
Researchers exposed the marine diatom Phaeodactylum tricornutum to 50 nm and 100 nm polystyrene nanoplastics and found that smaller particles triggered faster oxidative stress and photosynthetic damage while larger ones were more stable and caused greater growth inhibition over 72 hours, illustrating how particle size shapes toxicity dynamics in marine algae.
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.
Differential effect of nano vs. micro-sized plastics on live Chlorella sp. algae in water environment
Researchers exposed live Chlorella sp. algae to polystyrene particles ranging from 20 nm to 2000 nm and used confocal microscopy and fluorescence lifetime imaging to characterize interactions. Nanoplastics of 20–500 nm formed corona-like structures around algae cells and reduced chlorophyll fluorescence intensity and lifetime, indicating impaired photosynthesis, while larger 1000–2000 nm particles had minimal effects.
Size-Dependent Effects of Polystyrene Nanoplastics on Freshwater Microalgae After Long-Term Exposure
Researchers exposed a common freshwater algae species to polystyrene nanoplastics of three different sizes over an extended period. They found that the smallest particles caused the most damage to algae cells, while the largest particles had relatively mild effects, revealing a clear size-dependent toxicity pattern. The study suggests that the tiniest nanoplastic particles in freshwater environments may pose the greatest risk to the base of aquatic food webs.
Toxic effects of polystyrene nanoplastics on microalgae Chlorella vulgaris: Changes in biomass, photosynthetic pigments and morphology
This study tested how polystyrene nanoplastics of three different sizes affect green algae and found a clear pattern: smaller particles were more toxic than larger ones. The smallest nanoplastics (90 nm) caused the greatest reductions in algal growth and photosynthetic pigments, along with visible changes in cell shape and increased clumping. The findings suggest that as plastics break down into ever-smaller particles in the environment, their potential for biological harm may increase.
Mechanism of transport and toxicity response of Chlorella sorokiniana to polystyrene nanoplastics
Researchers studied how polystyrene nanoplastics are transported into freshwater algae cells and what toxic effects they cause. They found that the tiny plastic particles entered the cells through specific pathways and triggered oxidative stress, inhibiting algae growth. The study provides new insights into how nanoplastics disrupt the base of aquatic food chains by damaging microscopic organisms.
Influence of polystyrene microplastics on the growth, photosynthetic efficiency and aggregation of freshwater microalgae Chlamydomonas reinhardtii
Polystyrene microplastics at concentrations of 5–100 mg/L inhibited the growth and photosynthetic efficiency of the freshwater microalga Chlamydomonas reinhardtii, and promoted cell aggregation at higher concentrations, with effects scaling with dose.