Effect of weathering on environmental behavior of microplastics: Properties, sorption and potential risks

Liu, Peng; Zhan, Xin; Wu, Xiaowei; Li, Jinli; Wang, Hanyu; Gao, Shixiang

doi:10.1016/j.chemosphere.2019.125193

Cited by 530 publications

(198 citation statements)

References 136 publications

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“…Organic contaminants can be identified by its octanol-water partition coefficient for its hydrophobicity and hydrophilicity. It has been demonstrated that hydrophobic interaction can be a main mechanism for sorption of NPs/MPs [63]; thus, organic contaminants with high hydrophobicity can be more readily adsorbed on NPs/MPs [46]. Razanajatovo et al [25] also found that compounds (SMX, PRP, SER) with high hydrophobicity were easily adsorbed on PE MPs.…”

Section: Properties Of Organic Contaminantsmentioning

confidence: 99%

Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics

et al. 2020

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Nano and microplastics (NPs/MPs) have received widespread attention in recent years. Because of their large specific surface area and hydrophobicity, NPs/MPs can adsorb various organic contaminants. This article gives a brief review of the sorption behavior of organic contaminants to NPs/MPs, summarizes the possible sorption mechanisms, and analyzes the influencing factors in the environment on the sorption behavior and mechanisms of NPs/MPs. The main mechanisms of sorption of organic contaminants to NPs/MPs are partitioning, surface sorption (hydrogen bonding, π–π interaction, electrostatic interaction, and van der Waals force), and pore filling. The sorption behavior of organic contaminants to NPs/MPs is not only affected by the properties of the NPs/MPs and the organic contaminants, but also by the solution chemistry, such as the pH, ionic strength, and dissolved organic matter.

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Section: Properties Of Organic Contaminantsmentioning

confidence: 99%

Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics

et al. 2020

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“…The roughness and hydrophobicity of microplastics constitute the most prominent parameters controlling microplastic surface properties and hence can greatly influence microbial community structure (Gong et al 2019 ; Mercier et al 2017 ). Aged-microplastics, produced via exposure to UV light or incubation in water for several weeks, usually have increased surface area, roughness and polarity compared to virgin samples (Brennecke et al 2016 ; Jemec Kokalj et al 2019 ; Liu et al 2019 ; Liu et al 2020 ). Such structural changes must clearly influence the formation and fate of associated microbial communities (Gong et al 2019 ).…”

Section: Factors Influencing the Formation Of Microplastic Biofilmsmentioning

confidence: 99%

Microplastics provide new microbial niches in aquatic environments

Yang

Liu

Zhang

et al. 2020

Appl Microbiol Biotechnol

305

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Microplastics in the biosphere are currently of great environmental concern because of their potential toxicity for aquatic biota and human health and association with pathogenic microbiota. Microplastics can occur in high abundance in all aquatic environments, including oceans, rivers and lakes. Recent findings have highlighted the role of microplastics as important vectors for microorganisms, which can form fully developed biofilms on this artificial substrate. Microplastics therefore provide new microbial niches in the aquatic environment, and the developing biofilms may significantly differ in microbial composition compared to natural free-living or particle-associated microbial populations in the surrounding water. In this article, we discuss the composition and ecological function of the microbial communities found in microplastic biofilms. The potential factors that influence the richness and diversity of such microbial microplastic communities are also evaluated. Microbe-microbe and microbe-substrate interactions in microplastic biofilms have been little studied and are not well understood. Multiomics tools together with morphological, physiological and biochemical analyses should be combined to provide a more comprehensive overview on the ecological role of microplastic biofilms. These new microbial niches have so far unknown consequences for microbial ecology and environmental processes in aquatic ecosystems. More knowledge is required on the microbial community composition of microplastic biofilms and their ecological functions in order to better evaluate consequences for the environment and animal health, including humans, especially since the worldwide abundance of microplastics is predicted to dramatically increase. Key Points • Bacteria are mainly studied in community analyses: fungi are neglected. • Microbial colonization of microplastics depends on substrate, location and time. • Community ecology is a promising approach to investigate microbial colonization. • Biodegradable plastics, and ecological roles of microplastic biofilms, need analysis.

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“…More testing is also needed to evaluate weathering effects on the hazard potential of MNP because both stronger inhibition of growth (Fu et al, 2019) and noeffect outcomes (Gorokhova et al, 2020) have been reported for weathered particles compared to virgin ones. Plastic weathering changes the particle shape and size, surface area, and nearsurface functional groups leading to the increasing frequency of hydroxyl groups (Liu et al, 2020). Unfortunately, the low number of studies that employed weathered plastics precluded evaluation of this factor as a predictor of the effect size for growth inhibition.…”

Section: Discussionmentioning

confidence: 99%

Micro- and Nanoplastic Exposure Effects in Microalgae: A Meta-Analysis of Standard Growth Inhibition Tests

Reichelt

Gorokhova

2020

Front. Environ. Sci.

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Background: Ecological impacts of micro-and nanoplastics particles (MNP) are among the most discussed environmental concerns. In algae, MNP are commonly hypothesized to reduce growth, which is a standard ecotoxicological endpoint. However, the reported test outcomes vary, with both growth inhibition and stimulation being observed. Due to this conflict of information, a data synthesis for MNP potential to cause growth inhibition in toxicity testing is needed. Methods: We performed a meta-analysis study to assess the effect of MNP exposure on algal growth. Twenty studies published between 2010 and 2020 and representing 16 algal species and five polymer materials administered as particles in size range 0.04-3,000 µm were included in this meta-analysis. A random-effect model was used to estimate the effect size in three datasets: (1) Low concentration range (<100 mg/L), (2) High concentration range (≥100 mg/L), and (3) Full range model (0.004-1,100 mg/L), which encompassed all studies using the combination of experimental settings (test species, MNP concentration, polymer material, and particle size) yielding the highest effect size within a study. Reichelt and Gorokhova Nano/Microplastic Effects on Algal Growth particulates in the test system, and, hence, does not allow to attribute observed effects to the test polymers.

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Effect of weathering on environmental behavior of microplastics: Properties, sorption and potential risks

Cited by 530 publications

References 136 publications

Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics

Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics

Microplastics provide new microbial niches in aquatic environments

Micro- and Nanoplastic Exposure Effects in Microalgae: A Meta-Analysis of Standard Growth Inhibition Tests

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