Publications by authors named "V Iswarya"
In the current study, the effect of different types of titanium dioxide (TiO) nanoparticles (NPs) (rutile, anatase, and mixture) was analyzed on Ceriodaphnia dubia in the presence of algae under distinct irradiation conditions such as visible and UV-A. The toxicity experiments were performed in sterile freshwater to mimic the chemical composition of the freshwater system. In addition, the oxidative stress biomarkers such as MDA, catalase, and GSH were analyzed to elucidate the stress induced by the NPs on daphnids.
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- * The study investigates how different types of functionalized microplastics affect the toxicity of TiO NPs on marine algae (Chlorella sp.), finding that TiO NPs are significantly toxic while microplastics have minimal toxicity at higher concentrations.
- * Results indicate that certain microplastics, like plain and aminated polystyrene, enhance the toxicity of TiO NPs through oxidative stress, while carboxylated polystyrene microplastics may reduce toxicity due to aggregation in the marine environment. *
Article Synopsis
- The study investigates the environmental impact of increasing use of ZnO particles, focusing on their transfer from algae (Scenedesmus obliquus) to daphnia (Ceriodaphnia dubia).
- It finds that the toxicity and absorption of ZnO particles depend on their size and concentration, with smaller particles (50 nm) causing greater harm.
- Daphnia that fed on ZnO-exposed algae showed significant decreases in survival (15-20%) and accumulated Zn, indicating potential biomagnification in the food chain.
Owing to the increase in the usage of titanium dioxide nanoparticles (TiO NPs), their release into the aquatic environment is inevitable. In the aquatic ecosystem, TiO NPs can bio-magnify at various trophic levels in the food chain through dietary exposure. In the current study, the trophic transfer potential of two crystalline phases of TiO anatase and rutile nanoparticles (individual as well as a binary mixture) has been evaluated in the lake water matrix using algae-daphnia system.
View Article and Find Full Text PDFTitanium dioxide nanoparticles (TiO NPs) are the most risk assessed nanoparticles in the aquatic environment due to their increased usage in the various sectors from electronics to consumer products. The natural aquatic system also comprises of numerous toxicants like antibiotics, whose impact on the toxicity of nanoparticles are less assessed. Hence, it is essential to determine the effect of other toxicants on the TiO NP toxicity.
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