Induced structural changes of humic acid by exposure of polystyrene microplastics: A spectroscopic insight

Chen, Wei; Ouyang, Zhenyu; Qian, Chen; Yu, Han‐Qing

doi:10.1016/j.envpol.2017.10.027

Cited by 233 publications

(75 citation statements)

References 34 publications

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“…DOM may affect the sorption of organic compounds by NPs/MPs through complex interactions (Figure 2). It was reported that the surface properties of NPs/MPs could be changed by the presence of DOM, and the dispersion stability of NPs was more affected by DOM than MPs [68]. Xu et al [22] studied that fulvic acid had a significant effect on the sorption of TC by three MPs.…”

Section: Dommentioning

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: Dommentioning

confidence: 99%

Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics

et al. 2020

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“…Commonly, DOM has adverse effects on the adsorption capacity of microplastics [140,180,196,198,201,202]. DOM could interact with microplastics via π-π conjugation, carboxyl groups, and C=O bonds to form a conjugated co-polymer with an elevated electron density [203], which decreased the adsorption of other organic compounds through competition for the adsorption sites. It should be noted that the adsorbed DOM might also interact with pollutants, which may counteract or even exceed the negative effects.…”

Section: The Interactions Between Microplastics and Contaminantsmentioning

confidence: 99%

Current Progress on Marine Microplastics Pollution Research: A Review on Pollution Occurrence, Detection, and Environmental Effects

Liu

Wang

Zhu

et al. 2021

Water

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Recently, microplastics pollution has attracted much attention in the environmental field, as researchers have found traces of microplastics in both marine and terrestrial ecological environments. Here, we reviewed and discussed the current progress on microplastics pollution in the marine environment from three main aspects including their identification and qualification methods, source and distribution, and fate and toxicity in a marine ecosystem. Microplastics in the marine environment originate from a variety of sources and distribute broadly all around the world, but their quantitative information is still lacking. Up to now, there have been no adequate and standard methods to identify and quantify the various types of microplastics, which need to be developed and unified. The fate of microplastics in the environment is particularly important as they may be transferred or accumulated in the biological chain. Meanwhile, microplastics may have a high adsorption capacity to pollutants, which is the basic research to further study their fate and joint toxicity in the environment. Therefore, all the findings are expected to fill the knowledge gaps in microplastics pollution and promote the development of relative regulations.

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“…MPs and NPs can interact with various functional groups of the dissolved fraction (dissolved organic matter, DOM), which may be associated with inorganic pollutants [92][93][94]. The result would be the formation of organic complexes being potentially very toxic and moving through the soil profile [95]. Indeed, humic substances interacted with MPs (phenanthrene) and heavy metals (Pd and Cd), when adsorbed on a clay mineral (bentonite) [96].…”

Section: Soil Chemical-physical Propertiesmentioning

confidence: 99%

“…Indeed, humic substances interacted with MPs (phenanthrene) and heavy metals (Pd and Cd), when adsorbed on a clay mineral (bentonite) [96]. MPs can interact with the aromatic structure of DOM via π-π conjugation and then with carboxyl groups and C=O bonds [95]. Microplastics seem to act as electron donors to humic substances leading to highly conjugated co-polymers with an increased electron density [95] (Figure 3).…”

Section: Soil Chemical-physical Propertiesmentioning

confidence: 99%

“…MPs can interact with the aromatic structure of DOM via π-π conjugation and then with carboxyl groups and C=O bonds [95]. Microplastics seem to act as electron donors to humic substances leading to highly conjugated co-polymers with an increased electron density [95] (Figure 3). These effects depend on the plastics size and the pH of the soil solution.…”

Section: Soil Chemical-physical Propertiesmentioning

confidence: 99%

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Soil Pollution from Micro- and Nanoplastic Debris: A Hidden and Unknown Biohazard

et al. 2020

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The fate, properties and determination of microplastics (MPs) and nanoplastics (NPs) in soil are poorly known. In fact, most of the 300 million tons of plastics produced each year ends up in the environment and the soil acts as a log-term sink for these plastic debris. Therefore, the aim of this review is to discuss MP and NP pollution in soil as well as highlighting the knowledge gaps that are mainly related to the complexity of the soil ecosystem. The fate of MPs and NPs in soil is strongly determined by physical properties of plastics, whereas negligible effect is exerted by their chemical structures. The degradative processes of plastic, termed ageing, besides generating micro-and nano-size debris, can induce marked changes in their chemical and physical properties with relevant effects on their reactivity. Further, these processes could cause the release of toxic oligomeric and monomeric constituents from plastics, as well as toxic additives, which may enter in the food chain, representing a possible hazard to human health and potentially affecting the fauna and flora in the environment. In relation to their persistence in soil, the list of soil-inhabiting, plastic-eating bacteria, fungi and insect is increasing daily. One of the main ecological functions attributable to MPs is related to their function as vectors for microorganisms through the soil. However, the main ecological effect of NPs (limited to the fraction size < than 50 nm) is their capacity to pass through the membrane of both prokaryotic and eukaryotic cells. Soil biota, particularly earthworms and collembola, can be both MPs and NPs carriers through soil profile. The use of molecular techniques, especially omics approaches, can gain insights into the effects of MPs and NPs on composition and activity of microbial communities inhabiting the soil and into those living on MPs surface and in the gut of the soil plastic-ingesting fauna.

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Induced structural changes of humic acid by exposure of polystyrene microplastics: A spectroscopic insight

Cited by 233 publications

References 34 publications

Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics

Sorption Behavior and Mechanisms of Organic Contaminants to Nano and Microplastics

Current Progress on Marine Microplastics Pollution Research: A Review on Pollution Occurrence, Detection, and Environmental Effects

Soil Pollution from Micro- and Nanoplastic Debris: A Hidden and Unknown Biohazard

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