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Algal extracellular polymeric substances (algal-EPS) for mitigating the combined toxic effects of polystyrene nanoplastics and nano-TiO<sub>2</sub> in <i>Chlorella</i> sp.

Nanotoxicology 2023 19 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Lokeshwari Natarajan, Lokeshwari Natarajan, Lokeshwari Natarajan, Lokeshwari Natarajan, Lokeshwari Natarajan, Lokeshwari Natarajan, Lokeshwari Natarajan, Lokeshwari Natarajan, Lokeshwari Natarajan, Willie J.G.M. Peijnenburg M. Annie Jenifer, Amitava Mukherjee, M. Annie Jenifer, Amitava Mukherjee, Lokeshwari Natarajan, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, M. Annie Jenifer, Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Lokeshwari Natarajan, M. Annie Jenifer, Lokeshwari Natarajan, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Amitava Mukherjee, Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg Willie J.G.M. Peijnenburg

Summary

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.

Polymers

The continuous release of nanoparticles and nanoplastics into the marine environment necessitates the examination of their combined effects in marine organisms. Natural Organic Matter (NOM) can significantly influence the behavior of nanomaterials in the marine environment. The present study explores the effects of algal Extracellular Polymeric Substances (EPS) in reducing the combined toxic effects of three different polystyrene nanoplastics (PSNPs)- aminated (NH<sub>2</sub>-PSNPs), carboxylated (COOH-PSNPs), and plain PSNPs - and P25 titanium dioxide nanoparticles (Nano-TiO<sub>2</sub>) towards the marine alga, <i>Chlorella</i> sp. Two doses (0.25 and 2.5 mg/L) of nano-TiO<sub>2</sub> mixed with the PSNPs (1 mg/L) were employed. The COOH-PSNPs with 2.5 mg/L nano-TiO<sub>2</sub> exhibited higher growth inhibition toward algal cells. Addition of algal EPS to the mixture of NMs decreased the negative effect significantly. The mean hydrodynamic diameter increased significantly from 666 to 797 nm and 1248 to 3589 nm at concentrations 0.25 and 2.5 mg/L, respectively when the mixtures of nano-TiO<sub>2</sub> and COOH-PSNPs were incubated with the algal EPS. In comparison to the pristine NMs, the EPS-NMs were found to significantly reduce the superoxide and hydroxyl radical production. The results were further validated with the estimation of lipid peroxidation (LPO), esterase activity, photosynthetic efficiency, and membrane permeability in the cells. The major outcomes from this study highlight the role of algal EPS in significantly reducing the toxic impact of binary mixture of NMs in marine organisms.

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