Sorption of chemical contaminants on degradable and non-degradable microplastics: Recent progress and research trends

Torres, Fernando G.; Dioses-Salinas, Diana Carolina; Pizarro-Ortega, Carlos Ivan; De-la-Torre, Gabriel Enrique

doi:10.1016/j.scitotenv.2020.143875

Cited by 289 publications

(87 citation statements)

References 171 publications

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“…Sorption process usually stem from van der Waals interaction when they cannot be explained by either electrostatic interaction or hydrophobic interaction . The sorption of chemical contaminants by aliphatic polymeric sorbents such as polyethylene microplastics and polyvinyl chloride takes place through van der Waals interactions (Hüffer and Hofmann, 2016;Fred-Ahmadu et al, 2020a;Torres et al, 2021).…”

Section: Van Der Waals Forcementioning

confidence: 99%

Physisorption and Chemisorption Mechanisms Influencing Micro (Nano) Plastics-Organic Chemical Contaminants Interactions: A Review

Agboola

Benson

2021

Front. Environ. Sci.

117

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Microplastics, which serve as sources and vector transport of organic contaminants in both terrestrial and marine environments, are emerging micropollutants of increasing concerns due to their potential harmful impacts on the environment, biota and human health. Microplastic particles have a higher affinity for hydrophobic organic contaminants due to their high surface area-to-volume ratio, particularly in aqueous conditions. However, recent findings have shown that the concentrations of organic contaminants adsorbed on microplastic surfaces, as well as their fate through vector distribution and ecological risks, are largely influenced by prevailing environmental factors and physicochemical properties in the aquatic environment. Therefore, this review article draws on scientific literature to discuss inherent polymers typically used in plastics and their affinity for different organic contaminants, as well as the compositions, environmental factors, and polymeric properties that influence their variability in sorption capacities. Some of the specific points discussed are (a) an appraisal of microplastic types, composition and their fate and vector transport in the environment; (b) a critical assessment of sorption mechanisms and major polymeric factors influencing organic contaminants-micro (nano) plastics (MNPs) interactions; (c) an evaluation of the sorption capacities of organic chemical contaminants to MNPs in terms of polymeric sorption characteristics including hydrophobicity, Van der Waals forces, π–π bond, electrostatic, and hydrogen bond interactions; and (d) an overview of the sorption mechanisms and dynamics behind microplastics-organic contaminants interactions using kinetic and isothermal models. Furthermore, insights into future areas of research gaps have been highlighted.

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Section: Van Der Waals Forcementioning

confidence: 99%

Physisorption and Chemisorption Mechanisms Influencing Micro (Nano) Plastics-Organic Chemical Contaminants Interactions: A Review

Agboola

Benson

2021

Front. Environ. Sci.

117

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“…Thus, MPs did not influence the uptake and toxicity of silver (Ag) in zebrafish [61] while an antagonistic interaction with cadmium (Cd) was observed in the common goby juveniles [62]. In this regard, the ability of contaminants to be adsorbed to plastics may depend on the plastic's features and the type of contaminant [63], which directly influences its combined toxicity. Other studies carried out with cell lines have revealed that NPs seem to reduce the cytotoxicity of pharmaceuticals [40,48], whereas they failed to alter the toxicity of BaP and 3-nitrobenzanthrone (3-NBA) [64].…”

Section: The Presence Of Nanoplastics Increases the Toxicity Of Metalsmentioning

confidence: 99%

Functionalized Nanoplastics (NPs) Increase the Toxicity of Metals in Fish Cell Lines

González-Fernández

Baños

Esteban

2021

IJMS

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Nanoplastics (NPs) are one of the most abundant environment-threatening nanomaterials on the market. The objective of this study was to determine in vitro if functionalized NPs are cytotoxic by themselves or increase the toxicity of metals. For that, we used 50 nm polystyrene nanoparticles with distinct surface functionalization (pristine, PS-Plain; carboxylic, PS-COOH; and amino PS-NH2) alone or combined with the metals arsenic (As) and methylmercury (MeHg), which possess an environmental risk to marine life. As test model, we chose a brain-derived cell line (SaB-1) from gilthead seabream (Sparus aurata), one of the most commercial fish species in the Mediterranean. First, only the PS-NH2 NPs were toxic to SaB-1 cells. NPs seem to be internalized into the cells but they showed little alteration in the transcription of genes related to oxidative stress (nrf2, cat, gr, gsta), cellular protection against metals (mta) or apoptosis (bcl2, bax). However, NPs, mainly PS-COOH and PS-NH2, significantly increased the toxicity of both metals. Since the coexistence of NPs and other pollutants in the aquatic environment is inevitable, our results reveal that the combined effect of NPs with the rest of pollutants deserves more attention.

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“…In general, the adsorption mechanism between MPs and heavy metals can be generally described by electrostatic interactions, van der Waals forces, and π-π interactions (Fu et al, 2020;Lin et al, 2021;Torres et al, 2021). It was shown that all MPs have a pH point of zero charge (pHpzc) around 3, which implies that in the natural aqueous environment, MPs should carry a negative charge on their surface (Lin et al, 2021).…”

Section: Adsorption Kinetics and Isotherms Of Heavy Metals On Mpsmentioning

confidence: 99%

“…Compared to electrostatic interactions, van der Waals forces and π-π interactions play a relatively small role. However, they can further promote the sorption capacity (Torres et al, 2021). Their occurrence depends on the polymer type; e.g., PE (aliphatic polymer) exhibits van der Waals interactions, while PS (aromatic polymer) exhibits mainly π-π interactions.…”

Section: Adsorption Kinetics and Isotherms Of Heavy Metals On Mpsmentioning

confidence: 99%

Interactions Between Microplastics and Heavy Metals in Aquatic Environments: A Review

et al. 2021

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Microplastics (MPs), tiny particles broken down from larger pieces of plastics, have accumulated everywhere on the earth. As an inert carbon stream in aquatic environment, they have been reported as carriers for heavy metals and exhibit diverse interactive effects. However, these interactions are still poorly understood, especially mechanisms driving these interactions and how they pose risks on living organisms. In this mini review, a bibliometric analysis in this field was conducted and then the mechanisms driving these interactions were examined, especially emphasizing the important roles of microorganisms on the interactions. Their combined toxic effects and the potential hazards to human health were also discussed. Finally, the future research directions in this field were suggested. This review summarized the recent research progress in this field and highlighted the essential roles of the microbes on the interactions between MPs and heavy metals with the hope to promote more studies to unveil action mechanisms and reduce/eliminate the risks associated with MP presence.

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Sorption of chemical contaminants on degradable and non-degradable microplastics: Recent progress and research trends

Cited by 289 publications

References 171 publications

Physisorption and Chemisorption Mechanisms Influencing Micro (Nano) Plastics-Organic Chemical Contaminants Interactions: A Review

Physisorption and Chemisorption Mechanisms Influencing Micro (Nano) Plastics-Organic Chemical Contaminants Interactions: A Review

Functionalized Nanoplastics (NPs) Increase the Toxicity of Metals in Fish Cell Lines

Interactions Between Microplastics and Heavy Metals in Aquatic Environments: A Review

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