Aging Significantly Affects Mobility and Contaminant-Mobilizing Ability of Nanoplastics in Saturated Loamy Sand

Liu, Jin; Zhang, Tong; Tian, Lili; Liu, Xinlei; Qi, Zhichong; Ma, Yudao; Ji, Rong; Chen, Wei

doi:10.1021/acs.est.9b00787

Cited by 328 publications

(165 citation statements)

References 89 publications

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“…Weathering processes can both increase and decrease the adsorption/absorption capacity of MNPs for ambient contaminants and alter their mobility through environmental compartments (Rist & Hartmann, 2018;Liu et al, 2019). There is also the consideration of whether or not digestive processes within organisms that ingest MNPs can increase the rate or magnitude of chemical additives from plastic particles (Koelmans, Besseling & Foekema, 2014).…”

Section: Micro(nano)plastic Effect Vs Additive Effectmentioning

confidence: 99%

Plastic additives: challenges in ecotox hazard assessment

Barrick

Champeau

Châtel

et al. 2021

PeerJ

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The risk of plastic debris, and specifically micro(nano)plastic particles, to ecosystems remains to be fully characterized. One particular issue that warrants further characterization is the hazards associated with chemical additives within micro(nano)plastic as they are not chemically bound within the polymers and can be persistent and biologically active. Most plastics contain additives and are therefore potential vectors for the introduction of these chemicals into the environment as they leach from plastic, a process that can be accelerated through degradation and weathering processes. There are knowledge gaps on the ecotoxicological effects of plastic additives and how they are released from parent plastic materials as they progressively fragment from the meso to micro and nano scale. This review summarizes the current state of knowledge of the ecotoxicity of plastic additives and identifies research needs to characterize the hazard they present to exposed biota. The potential ecological risk of chemical additives is of international concern so key differences in governance between the European Union and New Zealand to appropriately characterize their risk are highlighted.

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Section: Micro(nano)plastic Effect Vs Additive Effectmentioning

confidence: 99%

Plastic additives: challenges in ecotox hazard assessment

Barrick

Champeau

Châtel

et al. 2021

PeerJ

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“…Additionally, worms have been reported to degrade plastics (Yang et al 2015b). Although microplastic can be biodegraded gradually, ageing primary or secondary microplastic is constantly structurally altered or fragmented through biological, mechanical, or chemical degradation in the environment into nanoplastic, which further increases its bioavailability to living organisms (Hernandez et al 2017;Liu et al 2019a;Wang et al 2019a). Furthermore, microplastic is a vector of harmful pollutants such as persistent organic pollutants (POP) and heavy metals, capable of transporting contaminants to the ecosystem via the food chain (Kwon et al 2017;Wang et al 2020a;Zhang et al 2020a).…”

Section: Introductionmentioning

confidence: 99%

Marine microplastics as vectors of major ocean pollutants and its hazards to the marine ecosystem and humans

Amelia

Khalik

Ong

et al. 2021

Prog Earth Planet Sci

330

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Microplastic pollutes water, land, air, and groundwater environments not only visually but also ecologically for plants, animals, and humans. Microplastic has been reported to act as vectors by sorbing pollutants and contributing to the bioaccumulation of pollutants, particularly in marine ecosystems, organisms, and subsequently food webs. The inevitable exposure of microplastic to humans emphasises the need to review the potential effects, exposure pathways, and toxicity of microplastic toward human health. Therefore, this review was aimed to reveal the risks of pollutant sorption and bioaccumulation by microplastic toward humans, as well as the dominant types of pollutants sorbed by microplastic, and the types of pollutants that are bioaccumulated by microplastic in the living organisms of the marine ecosystem. The possible factors influencing the sorption and bioaccumulation of pollutants by microplastic in marine ecosystems were also reviewed. The review also revealed the prevailing types of microplastic, abundance of microplastic, and geographical distribution of microplastic in the aquatic environment globally. The literature review revealed that microplastic characteristics, chemical interactions, and water properties played a role in the sorption of pollutants by microplastic. The evidence of microplastic posing a direct medical threat to humans is still lacking albeit substantial literature has reported the health hazards of microplastic-associated monomers, additives, and pollutants. This review recommends future research on the existing knowledge gaps in microplastic research, which include the toxicity of microplastic, particularly to humans, as well as the factors influencing the sorption and bioaccumulation of pollutants by microplastic.

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“…In the future, long-term and large-scale studies should be performed on the interactions of MPs and heavy metals in agroecosystems, particularly in food crops, to ensure food safety. Second, because the impacts of MPs usually vary greatly with plastic type, particle size and shape, and surface characteristics [19,20,41,45,46], further research should focus on the ecotoxicity of more MPs, particularly nanoscale plastics and aged MPs, and their associated contaminants. Third, PS produced stronger impacts on Cd bioavailability and plant growth than HDPE.…”

Section: Discussionmentioning

confidence: 99%

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

Wang

Zhang

et al. 2020

Toxics

175

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Microplastics (MPs) occur widely in terrestrial ecosystems. However, information on the interaction of MPs with metals in terrestrial ecosystems is lacking in the literature. The present study investigated the effects of two types of MPs (high-density polyethylene (HDPE) and polystyrene (PS)) with different dosages (i.e., 0, 0.1%, 1%, and 10%) on the uptake and effects of Cd in maize plants grown in an agricultural soil. Results showed that addition of Cd at a 5 mg/kg caused inhibited plant growth and resulted in high Cd accumulation in plant tissues. Polyethylene alone showed no significant phytotoxic effects, but a high-dose of HDPE (10%) amplified Cd phytotoxicity. Polystyrene negatively affected maize growth and phytoxicity further increased in the presence of Cd. Both HDPE and PS caused soil diethylenetriaminepentaacetic acid (DTPA)-extractable Cd concentrations to increase but did not significantly affect Cd uptake into plant tissues. In the soil without Cd addition, HDPE decreased soil pH, while PS did not significantly alter soil pH. However, in the soil spiked with Cd, both HDPE and PS increased pH. Overall, impacts on plant growth and Cd accumulation varied with MP type and dose, and PS induced substantial phytotoxicity. In conclusion, co-occurring MPs can change Cd bioavailability, plant performance, and soil traits. Our findings highlight the ecological impacts that could occur from the release of MPs into soil.

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Aging Significantly Affects Mobility and Contaminant-Mobilizing Ability of Nanoplastics in Saturated Loamy Sand

Cited by 328 publications

References 89 publications

Plastic additives: challenges in ecotox hazard assessment

Plastic additives: challenges in ecotox hazard assessment

Marine microplastics as vectors of major ocean pollutants and its hazards to the marine ecosystem and humans

Effects of Co-Contamination of Microplastics and Cd on Plant Growth and Cd Accumulation

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