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20 resultsShowing papers similar to Recent Findings in Adverse Effects of Tio2 NPs in Marine Algae and Zooplanktons: A Threat to Marine Ecosystems
ClearEco-Interactions of Engineered Nanomaterials in the Marine Environment: Towards an Eco-Design Framework
This review examines the behavior and ecological impact of engineered nanomaterials entering the marine environment, with a focus on titanium dioxide nanoparticles. Researchers found that these materials interact with marine organisms and co-occurring pollutants including microplastics in complex ways that challenge current risk assessment frameworks. The study proposes an eco-design approach to help minimize the environmental impact of nanomaterials before they reach marine ecosystems.
Toxicity evaluation of nano-TiO2 in the presence of functionalized microplastics at two trophic levels: Algae and crustaceans
Researchers examined how different surface-functionalized polystyrene microplastics affect the toxicity of titanium dioxide nanoparticles across two trophic levels, using algae and brine shrimp. They found that aminated and plain microplastics enhanced nano-TiO2 toxicity to algae, while carboxylated microplastics reduced it. Direct aqueous exposure caused greater toxicity in brine shrimp than dietary exposure, suggesting that the route of exposure significantly influences combined contaminant effects.
Individual and Binary Mixture Toxicity of Five Nanoparticles in Marine Microalga Heterosigma akashiwo
Researchers assessed the individual and combined toxicity of five nanoparticle types on marine microalgae, finding synergistic toxic effects from titanium dioxide and silicon dioxide mixtures likely caused by a Trojan horse mechanism of contaminant delivery.
Influence of differently functionalized polystyrene microplastics on the toxic effects of P25 TiO2 NPs towards marine algae Chlorella sp.
Differently functionalized polystyrene microplastics (plain, amino, carboxyl) were tested for their influence on the toxicity of TiO₂ nanoparticles to marine algae Chlorella sp., finding that microplastics altered TiO₂ aggregation behavior and modified its effective toxicity in a surface-chemistry-dependent manner. The study demonstrates that microplastic-nanoparticle interactions in marine environments can change the ecotoxicological outcome of either contaminant alone.
Polystyrene nanoplastics diminish the toxic effects of Nano-TiO2 in marine algae Chlorella sp.
Researchers found that polystyrene nanoplastics reduced the toxic effects of nano-titanium dioxide on marine algae by forming larger aggregates that decreased the bioavailability of both particle types. The combined exposure led to lower oxidative stress and reduced cellular damage compared to nano-titanium dioxide alone. The study demonstrates that interactions between different types of nanoparticles in marine environments can produce antagonistic effects that alter their individual toxicity profiles.
The Comparative Effects of Visible Light and UV-A Radiation on the Combined Toxicity of P25 TiO2 Nanoparticles and Polystyrene Microplastics on Chlorella sp
This study found that TiO2 nanoparticles and polystyrene microplastics together are more toxic to marine microalgae than either pollutant alone, and that UV-A radiation makes the combined toxicity significantly worse than under ordinary visible light. TiO2 generates reactive oxygen species under UV-A that damage algal cells, with microplastics amplifying the oxidative stress. Because TiO2 nanoparticles and microplastics co-occur in surface waters where UV light is abundant, this interaction could pose a greater threat to marine photosynthetic organisms than studies conducted under standard lab lighting would suggest.
Ecotoxicity of micro- and nanoplastics on aquatic algae: Facts, challenges, and future opportunities
This review provides a comprehensive assessment of how micro- and nanoplastics harm aquatic algae, which form the base of ocean and freshwater food chains. The toxic effects include reduced growth, oxidative stress, and disrupted photosynthesis, with nanoplastics generally causing more damage than larger particles. Since algae support the entire aquatic food web, their decline from plastic pollution could reduce the quality and safety of fish and shellfish consumed by people.
Diminishing toxicity of P25 TiO2 NPs during continuous exposure to freshwater algae Chlorella
Researchers found that freshwater algae (Chlorella) developed a degree of tolerance to titanium dioxide nanoparticles during prolonged continuous exposure, with toxicity diminishing over time. The study highlights that ecotoxicity assessments using short-term tests may overestimate long-term risks of nanoparticle pollution.
Combined Toxicity of TiO2 Nanospherical Particles and TiO2 Nanotubes to Two Microalgae with Different Morphology
Researchers investigated the combined toxicity of TiO2 nanospherical particles and TiO2 nanotubes to the freshwater algae Scenedesmus obliquus and Chlorella pyrenoidosa, finding that binary mixtures produced synergistic toxic effects dependent on the relative proportions of each nanoparticle type and the morphology of the target algae.
Research advances on impacts micro/nanoplastics and their carried pollutants on algae in aquatic ecosystems: A review
This review examines how micro- and nanoplastics harm algae, which are the foundation of aquatic food chains, by slowing growth, reducing photosynthesis, and damaging cells. The effects are worse when microplastics carry other pollutants on their surfaces, creating a combined toxic effect. Since algae support the entire aquatic food web, damage to these organisms can ripple upward through fish and shellfish to affect the safety of seafood consumed by humans.
Toxicity of a Binary Mixture of TiO2 and Imidacloprid Applied to Chlorella vulgaris
Combined exposure of the green alga Chlorella vulgaris to titanium dioxide nanoparticles and the insecticide imidacloprid produced synergistic growth inhibition and oxidative stress exceeding the effects of either compound alone, suggesting that pesticide-nanoparticle mixtures in agricultural runoff may pose greater algal toxicity than single-pollutant risk assessments predict.
Nanoplastics enhance the toxic effects of titanium dioxide nanoparticle in freshwater algae Scenedesmus obliquus
Researchers investigated how fluorescent nanoplastics modify the toxic effects of titanium dioxide nanoparticles on the freshwater algae Scenedesmus obliquus. They found that when nanoplastics were combined with titanium dioxide, oxidative stress markers, lipid damage, and antioxidant enzyme activity all increased significantly beyond individual exposures. The study demonstrates that nanoplastics can enhance the toxicity of other environmental contaminants in freshwater organisms.
Effects of nanoplastics on microalgae and their trophic transfer along the food chain: recent advances and perspectives
This review summarized evidence on how nanoplastics affect microalgae — including growth inhibition, oxidative stress, and altered photosynthesis — and examined trophic transfer of nanoplastics up the food chain, finding that toxicity depended on NP concentration, size, and surface charge.
Impact of Titanium Dioxide Nanoparticles on Agricultural Crops Performance: A Review of Efficacy and Mechanisms
This paper is not relevant to microplastics research; it reviews the effects of titanium dioxide nanoparticles on agricultural crop performance, focusing on photosynthesis enhancement and antimicrobial protection rather than plastic pollution.
The comparative effects of visible light and UV-A radiation on the combined toxicity of P25 TiO2 nanoparticles and polystyrene microplastics on Chlorella sp.
Scientists studied how titanium dioxide nanoparticles and polystyrene microplastics together affect green algae under visible light versus UV-A radiation. UV-A light made titanium dioxide more toxic on its own, but when combined with microplastics, the mixture actually reduced toxicity because the plastics absorbed some of the reactive chemicals generated by UV exposure. The findings suggest that light conditions significantly change how multiple pollutants interact in marine environments.
Impact of micro- and nano-plastics on marine organisms under environmentally relevant conditions
This review summarized the impacts of micro- and nanoplastics on marine organisms including microalgae, crustaceans, snails, and fish at environmentally realistic concentrations. Researchers found that while some species showed tolerance at low concentrations, chronic exposure to nanoplastics in particular caused oxidative stress and behavioral changes. The study emphasizes that more research using real-world concentration levels is needed to accurately assess the risks microplastics pose to ocean life.
Algal extracellular polymeric substances (algal-EPS) for mitigating the combined toxic effects of polystyrene nanoplastics and nano-TiO2 in Chlorella sp.
This study found that algal extracellular polymeric substances can coat both polystyrene nanoplastics and titanium dioxide nanoparticles and reduce their combined toxic effects on the green alga Chlorella, suggesting that natural organic matter in marine environments can buffer combined nanoparticle toxicity.
The microplastic menace: a critical review of its impact on marine photoautotrophs and their environment
This review examines how microplastics interact with marine macro- and microalgae, covering environmental prevalence, genetic responses to MP exposure, and mitigation strategies. It finds that annual introduction of 28.5 million tons of plastic into oceans threatens marine primary producers and indirectly affects marine food webs and human health through the consumption of contaminated seafood.
Micro/nanoplastic-induced stress in microalgae: Latest laboratory evidence and knowledge gaps
This review compiled laboratory evidence on how micro- and nanoplastics stress microalgae — the base of aquatic food webs — covering effects on photosynthesis, growth, oxidative stress, and toxin production. The authors identify key knowledge gaps including environmentally realistic concentrations and combined contaminant effects.
Impact of nanoparticles on microalgae and the prospects for biofuel production: Current advancements and future outlook
This study investigates the impact of nanoparticles on microalgae growth and their implications for biofuel production. Researchers reviewed current knowledge on how various nanoparticles can either enhance or inhibit algal growth depending on concentration and type. The findings suggest that understanding nanoparticle-microalgae interactions is important for developing sustainable biofuel technologies while managing environmental pollution concerns.