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61,005 resultsShowing papers similar to Co-exposure effects of polystyrene nanoplastics and silver nanoparticles in constructed wetlands: Microbial and macrophyte responses
ClearComprehensive metagenomic and enzyme activity analysis reveals the negatively influential and potentially toxic mechanism of polystyrene nanoparticles on nitrogen transformation in constructed wetlands
Researchers exposed constructed wetlands to polystyrene nanoparticles and found that even 1–10 mg/L concentrations suppressed denitrification and nitrification enzyme activities, reduced the abundance of nitrogen-cycling microbial genes, and generated oxidative stress in both macrophytes and microorganisms — disrupting the nitrogen transformation essential to wetland water-purification function.
The individual and combined effects of polystyrene and silver nanoparticles on nitrogen transformation and bacterial communities in an agricultural soil
Researchers ran a 45-day soil experiment combining polystyrene micro- and nanoplastics with silver nanoparticles, finding that the silver nanoparticles dominated nitrogen cycle disruption while polystyrene nanoplastics partially offset this by upregulating anammox genes — with particle size proving a critical variable in predicting combined ecological risk.
Toxic effects on ciliates under nano-/micro-plastics coexist with silver nanoparticles
Researchers tested the combined effects of different-sized plastic particles with silver nanoparticles on marine microorganisms and found that the mixture was more toxic than either pollutant alone. Smaller nanoplastics combined with silver nanoparticles caused the most severe damage, disrupting energy and fat metabolism and causing DNA and protein damage. This study shows how microplastics can amplify the toxicity of other environmental pollutants in marine food chains.
Nanoplastics intensify metal-induced impacts in freshwater ecosystems
Researchers found that polystyrene nanoplastics — both bare and carboxylated — intensified metal-induced impairment of leaf litter decomposition by aquatic hyphomycetes in freshwater microcosms, with combined stressor effects observed at environmentally relevant concentrations and amplified at higher exposures.
Insights into the interaction of microplastic with silver nanoparticles in natural surface water
Researchers co-exposed three common microplastics — polypropylene, polyethylene, and polystyrene — with silver nanoparticles in natural freshwater and brackish water, finding that their interaction altered the environmental behavior and fate of both contaminants. The results suggest that combined pollution from microplastics and nanomaterials produces effects distinct from either pollutant alone.
Negative impacts of nanoplastics on the purification function of submerged plants in constructed wetlands: Responses of oxidative stress and metabolic processes
Researchers exposed a submerged aquatic plant commonly used in constructed wetlands to polystyrene nanoplastics and measured the impacts on growth, photosynthesis, and metabolism. They found that nanoplastics were absorbed and transported throughout the plant, reducing growth by up to 73 percent and disrupting key metabolic pathways including the citric acid cycle. The study suggests that nanoplastic accumulation in wetland plants could compromise their ability to purify water.
Combined toxicity of nanoplastics and microcystin-LR to sulfate-reducing bacteria and the underlying mechanisms
Researchers exposed freshwater aquaculture microcosms to polyethylene nanoplastics and the algal toxin microcystin-LR, finding that nanoplastics strongly adsorb the toxin and that combined exposure disrupts sulfur cycling bacteria more severely than either contaminant alone, raising ecological concerns for aquaculture water quality.
Nanoplastics and their combined effects with sulphamethoxazole on the free-floating aquatic plant Lemna major
Researchers studied the combined effects of polystyrene nanoplastics and the antibiotic sulfamethoxazole on free-floating freshwater organisms, examining how co-exposure to these two pollutants interacts compared to individual exposures. Nanoplastics altered the bioavailability and toxicity of the antibiotic, demonstrating complex mixture effects in aquatic systems.
Can microplastics from personal care products affect stream microbial decomposers in the presence of silver nanoparticles?
This study exposed freshwater fungal decomposers to microplastics from personal care products and silver nanoparticles, individually and in combination, finding that both pollutants reduced microbial activity and that combined exposure often produced additive or synergistic inhibition. The results highlight the risk to stream-based decomposition processes from personal care product-derived pollutants.
Polystyrene microplastics sunlight-induce oxidative dissolution, chemical transformation and toxicity enhancement of silver nanoparticles
Researchers discovered that polystyrene microplastics can induce sunlight-driven oxidative dissolution and chemical transformation of silver nanoparticles, enhancing their toxicity and revealing important implications for how co-occurring pollutants interact in the environment.
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.
Toxic effects of nanoplastics on biological nitrogen removal in constructed wetlands: Evidence from iron utilization and metabolism
Researchers found that nanoplastics in wastewater disrupt biological nitrogen removal in constructed wetlands by interfering with intracellular iron homeostasis, which cripples the key enzymes and electron transport chains that microbes use for nitrogen metabolism, reducing nitrogen removal efficiency by about 30%.
Microplastics alleviate phytotoxicity of silver nanoparticles in Ottelia cordata submerged leaves
Researchers investigated the combined effects of silver nanoparticles and polystyrene microplastics on the aquatic plant Ottelia cordata, finding that microplastics actually alleviated the phytotoxicity of silver nanoparticles by reducing their bioavailability. The results highlight complex antagonistic interactions between co-occurring aquatic contaminants.
Integrative Evaluation of the Ecological Hazards by Microplastics and Heavy Metals in Wetland Ecosystem
Researchers conducted an integrative ecological hazard assessment of microplastics combined with heavy metals, evaluating their combined toxicity to aquatic organisms. The study found that co-contamination with heavy metals and microplastics poses greater ecological risk than either pollutant alone.
Single and combined effects of polystyrene nanoplastics and Cd on submerged plants Ceratophyllum demersum L.
Researchers studied the combined effects of nanoplastics and cadmium, a toxic heavy metal, on the aquatic plant Ceratophyllum demersum. They found that nanoplastics worsened cadmium's harmful effects on plant growth, photosynthesis, and cellular health, reducing growth rates by over 35%. The study suggests that when nanoplastics and heavy metals co-occur in water, their combined impact on aquatic plants may be more severe than either pollutant alone.
Single and combined toxicity of polystyrene nanoplastics and PCB-52 to the aquatic duckweed Spirodela polyrhiza
Researchers found that polystyrene nanoplastics and PCB-52 act synergistically to impair the aquatic plant Spirodela polyrhiza, with combined exposure amplifying oxidative stress, chlorophyll loss, and osmotic imbalance in roots beyond what either pollutant caused alone — while low nanoplastic doses alone mildly stimulated growth.
Single and Combined Effects of Phenanthrene and Silver Nanoparticles on Denitrification Processes in Coastal Marine Sediments
Researchers examined the individual and combined effects of phenanthrene (a PAH) and silver nanoparticles on denitrifying microbial communities in sediments, finding that combined exposure produced greater inhibition of denitrification activity than either contaminant alone. The results suggest co-contamination with PAHs and engineered nanoparticles poses compounded risks to nitrogen cycling in aquatic sediments.
Effects of polystyrene nanoplastics and PCB-44 exposure on growth and physiological biochemistry of Chlorella vulgaris
Researchers studied the combined effects of polystyrene nanoplastics and a common industrial pollutant (PCB-44) on a freshwater green algae species over both short and long exposure periods. They found that both contaminants individually inhibited algae growth and disrupted cell functions, but their combined presence intensified the damage. The study highlights that when nanoplastics and chemical pollutants co-exist in water, they can create compounding harmful effects on aquatic organisms.
Microplastics and silver nanoparticles compromise detrital food chains in streams through effects on microbial decomposers and invertebrate detritivores
Researchers tested how microplastics and silver nanoparticles, both common pollutants from personal care products, affect stream food webs built around decomposing leaf litter. They found that both pollutants, alone and in combination, reduced fungal decomposition and harmed invertebrate feeding and growth, disrupting the base of the food chain. The study suggests that the co-occurrence of these contaminants in freshwater could impair nutrient cycling in stream ecosystems.
Enhanced microalgal toxicity due to polystyrene nanoplastics and cadmium co-exposure: From the perspective of physiological and metabolomic profiles
Researchers studied the combined toxicity of polystyrene nanoplastics and cadmium on the microalga Euglena gracilis and found that co-exposure produced synergistic effects, inhibiting growth by nearly 29%. The organisms activated antioxidant defenses and showed significant disruptions in carbohydrate, lipid, and amino acid metabolism. The findings suggest that nanoplastics and heavy metals together pose greater risks to aquatic microorganisms than either pollutant alone.
Ecotoxicity of emerging pollutants: Interactive impact of polystyrene nanoplastics and Metanil yellow on Artemia salina
Researchers exposed a common marine test animal, brine shrimp, to polystyrene nanoplastics combined with a synthetic yellow dye and found the mixture was far more toxic than either substance alone, killing over 93% of shrimp. The dye coated the nanoplastic surfaces, increased particle size, and amplified oxidative stress, showing that nanoplastics can make co-existing pollutants more dangerous.
Co-effects of silver nanoparticles and microplastics on nitrifying microorganisms from wastewater treatment plants and their activities
This study investigated how silver nanoparticles and microplastics — two emerging contaminants — together affect the bacteria responsible for removing ammonia in wastewater treatment. High concentrations of silver nanoparticles inhibited ammonia oxidation, and the combination with microplastics altered bacterial community composition, raising concerns about wastewater treatment performance.
Effects of long-term exposure to silver nanoparticles on the structure and function of microplastic biofilms in eutrophic water
Long-term exposure to silver nanoparticles altered the structure and function of microbial biofilms on microplastics in eutrophic water, with nanoparticles suppressing biofilm biomass, changing community composition, and reducing metabolic activity, raising concerns about combined pollutant effects in urban aquatic systems.
Effects of polystyrene nanoplastics on Ctenopharyngodon idella (grass carp) after individual and combined exposure with zinc oxide nanoparticles
Researchers studied the individual and combined toxic effects of polystyrene nanoplastics and zinc oxide nanoparticles on grass carp. They found that co-exposure caused more severe oxidative stress, immune suppression, and gill tissue damage than either pollutant alone. The study suggests that interactions between nanoplastics and metal nanoparticles in aquatic environments can produce synergistic toxic effects on freshwater fish.