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61,005 resultsShowing papers similar to Influence of polystyrene microplastic and nanoplastic on copper toxicity in two freshwater microalgae
ClearCombined effects of nanoplastics and copper on the freshwater alga Raphidocelis subcapitata
Researchers found that carboxylated polystyrene nanoplastics do not adsorb copper ions or alter copper toxicity to freshwater algae in short- or long-term tests, but that nanoplastics do attach to algal cell walls and cause morphological changes — highlighting the importance of prolonged exposures and multiple endpoints in nanoplastic toxicity assessments.
Single and combined toxicity of polystyrene nanoplastics and copper on Platymonas helgolandica var. tsingtaoensis: Perspectives from growth inhibition, chlorophyll content and oxidative stress
Researchers investigated the single and combined toxicity of polystyrene nanoplastics and copper on the marine microalga Platymonas helgolandica. The study found that copper alone inhibited growth in a dose-dependent manner, while nanoplastics modified copper's bioavailability and altered the combined toxic response. The results suggest that the interaction between nanoplastics and heavy metals can produce complex toxicity patterns that differ from individual exposures.
Polystyrene nanoplastics alleviate the toxicity of CuO nanoparticles to the marine algae Platymonas helgolandica var. tsingtaoensis
Polystyrene nanoplastics were found to alleviate the toxicity of copper oxide nanoparticles to the marine microalga Chlorella vulgaris, likely by adsorbing copper ions onto their surface and reducing bioavailability. The antagonistic interaction highlights how co-occurring nanomaterials can unexpectedly modify each other's environmental toxicity.
Effects of polystyrene microplastics on copper toxicity to the protozoan Euglena gracilis: emphasis on different evaluation methods, photosynthesis, and metal accumulation
Polystyrene microplastics altered the toxicity of copper to the protozoan Euglena gracilis, with effects on photosynthesis and metal accumulation showing that microplastics can either enhance or reduce copper toxicity depending on exposure concentration and duration.
Antidote or Trojan horse for submerged macrophytes: Role of microplastics in copper toxicity in aquatic environments
Researchers investigated whether polyethylene microplastics act as an antidote or a Trojan horse for copper toxicity to submerged aquatic plants. The study found that microplastics reduced dissolved copper concentrations through adsorption but could then release copper-loaded particles that were taken up by plants. The results suggest that microplastics may initially reduce copper toxicity in water but ultimately serve as carriers that deliver copper directly into plant tissues.
Exploring the Role of Polystyrene Microplastics in Cu Binding in Sea Surface Waters: An Experimental Perspective for Future Research
The role of polystyrene microplastics in binding copper (Cu) and altering its environmental mobility and toxicity was investigated, finding that microplastics can both adsorb and release copper depending on environmental conditions. This has implications for how microplastics modulate heavy metal hazards in contaminated environments.
Combined effects of polystyrene microplastics and natural organic matter on the accumulation and toxicity of copper in zebrafish
Researchers investigated the combined effects of polystyrene microplastics and natural organic matter on copper accumulation and toxicity in zebrafish. They found that microplastics increased copper accumulation in the liver and gut, and that natural organic matter further amplified this effect in a size-dependent manner. The study suggests that microplastics in natural waters can interact with dissolved organic matter and metals to create more harmful exposure conditions for aquatic organisms.
Combined effects of polystyrene microplastics and copper on the growth and nutritional profile of Raphidocelis subcapitata
Researchers investigated the combined effects of polystyrene microplastics and copper on the growth and nutritional profile of the freshwater green alga Raphidocelis subcapitata, examining whether co-exposure to these two contaminants produces interactive toxicity effects beyond individual exposures.
Inhibitory Effect of Combined Exposure to Copper Ions and Polystyrene Microplastics on the Growth of Skeletonema costatum
Researchers examined how copper ions and polystyrene microplastics individually and together affect the growth of the marine diatom Skeletonema costatum. The study found that microplastics can adsorb copper ions, temporarily reducing copper toxicity to algal cells, but over longer exposure periods the inhibitory effects of microplastics themselves counteracted that benefit.
Understanding the Role of Low-Dose Polystyrene Microplastic in Copper Toxicity to Rice Seed (Oryza sativa L.)
This study explored how polystyrene microplastics interact with copper toxicity in rice seeds. Researchers found that microplastics actually reduced copper's harmful effects by physically accumulating on seed coats and blocking copper absorption, lowering the amount of copper taken up by seedlings by about 34%. The findings highlight how microplastics can alter the way other environmental contaminants affect plants.
Microplastic Impacts on Microalgae Growth: Effects of Size and Humic Acid
Researchers investigated how different sizes of polystyrene microplastics affect the growth of freshwater microalgae, both with and without naturally occurring humic acid. They found that larger particles blocked light and disrupted photosynthesis, while smaller ones damaged cell walls by adhering to the algae surface. Adding humic acid significantly reduced the toxicity of smaller microplastics by forming a protective coating around the particles.
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.
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.
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.
Mechanism of microplastics effects on the purification of heavy metals in piggery effluents by microalgae
Experiments showed that polystyrene microplastics inhibited the ability of microalgae to remove copper and zinc from piggery wastewater, reducing the bioremediation efficacy through mechanisms including altered algal physiology and metal adsorption onto plastic surfaces.
Different effects and mechanisms of polystyrene micro- and nano-plastics on the uptake of heavy metals (Cu, Zn, Pb and Cd) by lettuce (Lactuca sativa L.)
Researchers investigated how polystyrene micro- and nanoplastics affect the uptake of heavy metals by lettuce grown in contaminated soil. They found that nanoplastics increased the accumulation of copper and zinc in lettuce leaves, while microplastics had the opposite effect for some metals. The study reveals that plastic particle size plays a critical role in determining whether microplastics worsen or reduce heavy metal contamination in food crops.
Uptake of Cu2+ by unicellular microalga Chlorella vulgaris from synthetic wastewaters is attenuated by polystyrene microspheres
This study found that polystyrene microspheres significantly reduced the ability of the green microalga Chlorella vulgaris to absorb copper from wastewater, with positively charged microspheres causing more disruption than negatively charged ones. The findings suggest that microplastics in water can interfere with the natural bioremediation function of algae, potentially affecting both ecosystem services and wastewater treatment.
Ingestion and toxicity of microplastics in the freshwater gastropod Lymnaea stagnalis: No microplastic-induced effects alone or in combination with copper
Scientists exposed the freshwater snail Lymnaea stagnalis to polystyrene microplastics alone and combined with copper, finding that the snails ingested and excreted microplastics but that neither microplastics alone nor in combination with copper caused measurable toxic effects.
Adsorption properties and influencing factors of Cu(II) on polystyrene and polyethylene terephthalate microplastics in seawater
Researchers investigated how polystyrene and polyethylene terephthalate microplastics adsorb copper ions in seawater, characterizing adsorption kinetics and influencing factors to understand microplastics' role as vectors for heavy metal pollutants in marine environments.
Aged microplastics decrease the bioavailability of coexisting heavy metals to microalga Chlorella vulgaris
Researchers studied how aged (environmentally weathered) microplastics interact with heavy metals copper and cadmium in their effects on green algae. They found that while both microplastics and heavy metals individually inhibited algal growth, combining aged microplastics with heavy metals actually reduced the toxicity of the metals. The study suggests that aged microplastics can adsorb heavy metals from water, decreasing their availability to organisms, though the microplastics themselves still pose a separate toxic threat.
Roles of polystyrene micro/nano-plastics as carriers on the toxicity of Pb2+ to Chlamydomonas reinhardtii
Researchers found that nano-sized polystyrene plastics intensified lead toxicity to green algae by facilitating internalization of absorbed lead, while micro-sized plastics reduced lead bioavailability through competitive adsorption, revealing size-dependent carrier effects.
Micro-polyethylene particles reduce the toxicity of nano zinc oxide in marine microalgae by adsorption
Researchers discovered that polyethylene microplastic particles reduced the toxicity of zinc oxide nanoparticles to marine microalgae by adsorbing the nanoparticles onto their surface, revealing that microplastics can modify the bioavailability of co-occurring contaminants.
CuO Nanoparticles Reduce Toxicity and Enhance Bioaccumulation of Cadmium and Lead in the Cells of the Microalgae Desmodesmus communis
Researchers investigated how copper oxide nanoparticles affect the toxicity and uptake of cadmium and lead by a freshwater microalgae species. They found that the nanoparticles actually reduced the toxic effects of these heavy metals while increasing how much the algae absorbed them into their cells. The study suggests that nanoparticle-metal interactions in polluted waters may alter both the toxicity and bioaccumulation patterns of heavy metal contaminants.
Effect of microplastics and microplastic-metal combinations on growth and chlorophyll a concentration of Chlorella vulgaris
Researchers tested the effects of polystyrene microplastics alone and in combination with metals (copper, zinc, manganese) on the freshwater microalga Chlorella vulgaris. The study found that low microplastic concentrations had no significant impact, but higher concentrations reduced algal growth and chlorophyll content, with metal-microplastic combinations producing more pronounced effects.