Polystyrene microplastics sunlight-induce oxidative dissolution, chemical transformation and toxicity enhancement of silver nanoparticles

Tong, Ling; Duan, Peng; Tian, Xiang; Huang, Jiaolong; Ji, Junfu; Yang, Jun; H, Yu; Zhang, Weicheng

doi:10.1016/j.scitotenv.2022.154180

Cited by 18 publications

(15 citation statements)

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“…Furthermore, the PS MPs were likely adsorbed on the surface of the middle root section ( Figures 6C, D ) rather than on the root tips ( Figures 6A, B ) and in turn decreased Cu 2+ bioavailability. Notably, the uptake of nanosized MPs into plant roots has been determined previously ( Jiang et al., 2019 ; Lian et al., 2020 ; Liu et al., 2021 ), and it has been shown that PS MPs vehicle effects on the biotic uptake of heavy metals (such as Zn 2+ and Ag + ) are possible ( Tong et al., 2022a ; Tong et al., 2022b ). However, in this study, the PS MPs bound to the lettuce root surface ( Figure 6 ) rather than becoming embedded in the root.…”

Section: Resultsmentioning

confidence: 95%

“…Nevertheless, the effects of MPs on plant growth at environmental concentrations (e.g., 1 mg/L) have not been investigated. Given that both MPs and other contaminants can coexist in the environment for a long time, MPs can serve as vectors for other contaminants, such as Cu ( Zong et al., 2021 ; Zhou et al., 2022 ), Cd ( Zong et al., 2021 ; Zeb et al., 2022 ), Ag + ( Sun et al., 2020 ), As(III) ( Dong et al., 2020 ), phenanthrene ( Liu et al., 2021 ), oxytetracycline ( Bao et al., 2021 ), and nanomaterials ( Li et al., 2020 ; Yang et al., 2021 ; Tong et al., 2022a ; Tong et al., 2022b ), and can modify the toxicity of these environmental contaminants to biota ( Fries et al., 2013 ; Pacheco et al., 2018 ; Li et al., 2020 ; Yang et al., 2021 ; Zhang et al., 2021 ; Tong et al., 2022a ; Tong et al., 2022b ). In principle, MPs likely coexist with Cu(OH) 2 nanopesticides in the environment and induce coupled effects on plant growth, due to they are share the entry path into environment and share the major sink a long time in environment ( Rajput et al., 2020 ; Wang et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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Polystyrene microplastics protect lettuce (Lactuca sativa) from the hazardous effects of Cu(OH)2 nanopesticides

et al. 2022

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Copper-based nanopesticides are released into the environment during foliar spray application, and they could, on their own or in combination with microplastics (MPs), pose threats to environmental safety and human health. In this study, Cu(OH)2 nanowires greatly decreased the vigor of lettuce seeds (p< 0.01) and the root length of lettuce seedlings (p< 0.01) and significantly altered the lettuce antioxidant defence system and MDA content (p< 0.05). Released Cu2+ played a critical role in the toxicity mechanism of Cu(OH)2 nanowires in lettuce seedlings, as evidenced by the substantial accumulation of Cu in the seedling roots (p< 0.01) rather than in the leaves. Polystyrene (PS) MPs (1 mg/L) stimulated lettuce seedling growth, as shown by the (highly) significant increase in root and leaf length and in the seed vigor index (p< 0.01 or 0.05). Notably, PS MPs (1 mg/L) neutralized the hazardous effects of 1 mg/L Cu(OH)2 nanowire treatment on lettuce growth, as reflected by the vitality and root length of the seedlings returning to normal levels. The PS MPs (1 mg/L) absorbed on middle root surfaces and strongly hindered Cu accumulation in lettuce roots, which was the predominant mechanism by which PS MPs suppressed the hazardous effects of the Cu(OH)2 nanowires. This study strengthens the understanding of the toxicity and toxicity mechanisms of Cu(OH)2 nanowires with or without PS MPs in the environment.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Polystyrene microplastics protect lettuce (Lactuca sativa) from the hazardous effects of Cu(OH)2 nanopesticides

et al. 2022

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“…Due to the high vacuum chamber requirement, conventional SEM and TEM specimens need to be in the solid form. Liquid phase system research is critical in the field of physics (Xu et al, 2021), chemistry (Tong et al, 2022), catalyst (Liu et al, 2019), particle growth and erosion (Wu et al, 2017), nanomaterial self-assembly (Woehl & Prozorov, 2015), electrochemistry (Tan et al, 2021), new energy material research (Chen et al, 2021;Wang et al, 2021), and biology (Smith & Chen, 2020). Thus the recent breakthroughs in the in situ liquid cell electron microscopy (LC-EM) have brought strong attentions around the world (de Jonge & Ross, 2011; Lin et al, 2016;Wu et al, 2020).…”

Section: Background and Originality Contentmentioning

confidence: 99%

In situ liquid cell SEM observation of dynamic processes of Au nanoparticles

Chen

Tan

Cheng

et al. 2023

Microscopy Res & Technique

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In situ liquid cell electron microscopy (LC‐EM) is a powerful platform for real time nanoscale imaging of liquid systems. In situ liquid cell scanning electron microscopy (LC‐SEM) as a relatively low cost and potentially more convenient characterization method, has not been as widely used as compared to in situ liquid cell transmission electron microscopy (LC‐TEM). This paper reports a real time high resolution and comprehensive characterization of Au nanoparticles (NPs) and nanoparticle clusters (NPCs), which are surface‐decorated with cetyltrimethylammonium bromide (CTAB), in an oleic acid (OA) emulsion system with LC‐SEM. Single NP resolution images are routinely collected with both secondary electron (SE) and backscattered electron (BSE) imaging modes, with different SEM systems. Energy dispersive spectroscopy (EDS) mapping data clearly demonstrates the single particle level chemical element distributions, particle stacking structure, as well as the preferred distribution of OA molecules on the Au particle surfaces. Moreover, both liquid droplet growth and particle motions are observed with LC‐SEM, among which, ways for faster tracking the single particle level dynamic motion behavior of Au NPs and NPCs are explored. We expect that our work will bring new insight of high resolution and fast analysis in a broad range of materials in liquid with LC‐SEM.

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“…The photo-oxidation of MNPs may enhance or reduce the adsorption capacity toward pollutants, and thus change the mobility of pollutants. , Liu et al reported that the photoaged PS NPs increased the mobility of both nonpolar (pyrene) and polar contaminants (4-nonylphenol) in saturated loamy sand compared to pristine NPs due to increased binding with contaminants . In addition to affecting the adsorption behavior of other contaminants, the photo-oxidation of MNPs may also produce environmentally persistent free radicals (EPFRs) and ROS, and mediate the photochemical transformation of pollutants, such as organic pollutants (OPs), , heavy metals (HMs), and engineered nanoparticles (ENPs). , The modified surface properties, the generated EPFRs and ROS, and the leached polymer molecules and additives of MNPs after photo-oxidation can also change their toxicities to organisms and affect microorganisms in the surrounding matrix, such as biofilm formation on MPs, the growth of planktonic microbes, , as well as the microbial community in soil and sediment systems. , All in all, photo-oxidation can influence the physical, chemical, and biological processes of MNPs in aquatic and terrestrial environments.…”

Section: Introductionmentioning

confidence: 99%

Photo-oxidation of Micro- and Nanoplastics: Physical, Chemical, and Biological Effects in Environments

Xu,

Ou,

van der Hoek

et al. 2024

Environ. Sci. Technol.

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Micro-and nanoplastics (MNPs) are attracting increasing attention due to their persistence and potential ecological risks. This review critically summarizes the effects of photo-oxidation on the physical, chemical, and biological behaviors of MNPs in aquatic and terrestrial environments. The core of this paper explores how photo-oxidation-induced surface property changes in MNPs affect their adsorption toward contaminants, the stability and mobility of MNPs in water and porous media, as well as the transport of pollutants such as organic pollutants (OPs) and heavy metals (HMs). It then reviews the photochemical processes of MNPs with coexisting constituents, highlighting critical factors affecting the photo-oxidation of MNPs, and the contribution of MNPs to the phototransformation of other contaminants. The distinct biological effects and mechanism of aged MNPs are pointed out, in terms of the toxicity to aquatic organisms, biofilm formation, planktonic microbial growth, and soil and sediment microbial community and function. Furthermore, the research gaps and perspectives are put forward, regarding the underlying interaction mechanisms of MNPs with coexisting natural constituents and pollutants under photo-oxidation conditions, the combined effects of photo-oxidation and natural constituents on the fate of MNPs, and the microbiological effect of photoaged MNPs, especially the biotransformation of pollutants.

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Polystyrene microplastics sunlight-induce oxidative dissolution, chemical transformation and toxicity enhancement of silver nanoparticles

Cited by 18 publications

References 50 publications

Polystyrene microplastics protect lettuce (Lactuca sativa) from the hazardous effects of Cu(OH)2 nanopesticides

Polystyrene microplastics protect lettuce (Lactuca sativa) from the hazardous effects of Cu(OH)2 nanopesticides

In situ liquid cell SEM observation of dynamic processes of Au nanoparticles

Photo-oxidation of Micro- and Nanoplastics: Physical, Chemical, and Biological Effects in Environments

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