A reliable procedure to obtain environmentally relevant nanoplastic proxies

Abstract

More environmentally relevant nanoplastic models are urgently needed. Models of environmental plastics are used to develop analytical methods to get an accurate picture of how nanoplastics behave in natural systems,...

In Vitro High-Throughput Toxicological Assessment of Nanoplastics

“…The ratio of the oxidized carbon bond with the aliphatic/aromatic C-C bonds increases in the laser-ablated NPs, especially in the case of PC NPs, compared with the starting material. These relative abundances of different oxidized carbon bonds on the NPs surface qualitatively reflect oxidation chemistry, measured using a similar method, on plastic NPs proxies obtained via mechanical milling and fractionating environmental plastic samples [27]. In PC and PET1, a new oxidized functionality (C=O bond) is exposed, and the satellite shakeup features (related to delocalized C-C bonds in aromatic rings) decrease in PET1 NPs (Figure 2).…”

“…Only recently, ongoing efforts have been made to improve the representativeness of NPs samples and to investigate the fate and behavior in the environment, as well as the toxicity on living organisms [24][25][26][27]. Magrì et al [28,29] have described a topdown approach to obtain PET NPs, based on the laser ablation of PET films in water.…”

Linking the physical and chemical characteristics of single small microplastics or nanoplastics via photolithographic silicon substrates

“…The shaking procedure was according to previous studies with modications. 13,18 Firstly, fragments were cleaned with a brush and then submerged in hydrogen peroxide (10% v/ v) to remove any surface contaminants. Because hydrogen peroxide can destroy the surface substances, it was not suitable for the treatment of eld samples in future applications.…”

“…[10][11][12] Unlike primary plastics designed for commercial products, particles in the environment are highly variable in morphology and micro-organization. 2,13 However, characterization of single SMPs and NPs faces a major challenge with the combination of morphological and chemical information. 14 Most polymer identications rely on spectroscopic features that are irrelevant to the morphological proles.…”

2019 Best Papers published in the Environmental Science journals of the Royal Society of Chemistry

“…We are also thrilled to spotlight all the best papers from the Environmental Science family of journals. [1][2][3][4][5][6][7][8][9][10][11][12] These papers collectively highlight our privilege to advance science, its application, and its diversity.…”