Lignin derived hydrophobic deep eutectic solvents for the extraction of nanoplastics from water

As a growing concern in aqueous systems, micro- and nano-plastics, especially nanoplastics (NPs), have been widely detected in the environment and organisms, posing a potential threat to ecosystems and human health. Hydrophobic deep eutectic solvents (HDESs) have emerged as environmentally friendly...

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Bibliographic Details
Published in:Journal of hazardous materials 2024-04, Vol.467, p.133695-133695, Article 133695
Main Authors: Zhang, Yuxuan, Hunter, Jameson R., Ullah, Ahamed, Shao, Qing, Shi, Jian
Format: Article
Language:English
Subjects:
Extraction
Hydrophobic deep eutectic solvents
Lignin derivatives
Mechanism
Nanoplastics
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Summary:As a growing concern in aqueous systems, micro- and nano-plastics, especially nanoplastics (NPs), have been widely detected in the environment and organisms, posing a potential threat to ecosystems and human health. Hydrophobic deep eutectic solvents (HDESs) have emerged as environmentally friendly solvents that have shown promise for extracting pollutants from water, either for detection or removal purposes. Herein, we investigated the extraction of polystyrene (PS) and polyethylene terephthalate (PET) NPs from aqueous solution using lignin based HDESs as sustainable solvents. Rapid extraction of both PET and PS NPs was observed with the high extraction efficiency achieved (> 95%). The extraction capacities for PET and PS could reach up to 525.877 mg/mL and 183.520 mg/mL, respectively, by the Thymol-2,6-dimethoxyphenol 1:2 HDES. Moreover, the extraction mechanism was studied using various techniques including Fourier-transform infrared analysis, contact angle measurements, molecular dynamics simulation, kinetics, and isotherm studies. This work lays a foundational basis for the future development of innovative HDES-based technologies in the detection and remediation of NPs as part of the grand challenge of plastic pollution. [Display omitted] •Sustainable lignin-based HDESs efficiently extracted NPs with extraction rates > 95%.•Physical interactions were the main driving force for the extraction process.•HDES-water interfacial properties could influence the extraction efficiency.•The dynamics and equilibrium states of NP extraction were studied.•High extraction capacities for NPs could be achieved.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2024.133695