The heteroaggregation behavior of nanoplastics on goethite: Effects of surface functionalization and solution chemistry

Wu, Jiayan; Ye, Quanyun; Li, Peiran; Sun, Leiye; Huang, Minye; Liu, Jieyu; Ahmed, Zubair; Wu, Pingxiao

doi:10.1016/j.scitotenv.2023.161787

Cited by 19 publications

(2 citation statements)

References 51 publications

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“…Many previous studies have shown that electrostatic interactions play a pivotal role in the heteroaggregation of PSNPs and minerals. ,− Therefore, aggregation experiments under different electrolytes (NaCl, MgCl 2 ) and pHs were carried out to explore the electrostatic interactions of PSNPs and boehmite (Figure ).…”

Section: Results and Discussionmentioning

confidence: 99%

Mineral Morphology-Mediated Interaction of Boehmite with Polystyrene Nanoplastics (PSNPs) and Validation in an Aqueous Environment

Huang,

Wu,

et al. 2024

ACS EST Water

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In an aqueous environment, the aggregation between minerals and polystyrene nanoplastics (PSNPs) is a crucial process affecting the geochemical behavior of PSNPs. Mineral morphology is an important factor determining their properties, further influencing the heteroaggregation of PSNPminerals. In this study, the aggregation between PSNPs and three morphologies of boehmite (γ-AlOOH) was investigated, and the effects of pH, electrolytes, and hydrogen bonds were discussed to further explore the mechanism. The results showed that boehmite played an important role in the aggregation. The heteroaggregation behavior was inhibited with the decrease of pH or the increase of electrolyte concentration, which followed the DLVO theory. The heteroaggregation extent of PSNPs among boehmites was rodshaped boehmite (Rod-boe) > flake-shaped boehmite (Flake-boe) > fiber-shaped boehmite (Fiber-boe), which could be explained by the different contents of hydroxyl groups of boehmites and the formation of hydrogen bonds. Furthermore, natural samples from the Pearl River with a salinity gradient were collected for aggregation experiments. The results showed that electrolyte is an important factor in the aggregation of PSNPs in natural water. Our study reflected the important role of mineral morphology in the aggregation of PSNPs and provided new insights into the potential fate of PSNPs in an aqueous environment.

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Section: Results and Discussionmentioning

confidence: 99%

Mineral Morphology-Mediated Interaction of Boehmite with Polystyrene Nanoplastics (PSNPs) and Validation in an Aqueous Environment

Huang,

Wu,

et al. 2024

ACS EST Water

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“…For instance, PS nanoplastics with small size can rapidly form heteroaggregates with organic matter and Ca 2+ (Song et al 2019). Functional groups like -NH 2 or -COOH enhance heteroaggregation between PS nanoplastics and ferrihydrite, which is further affected by the pH and ionic strength levels (Wu et al 2023). UV light irradiation can introduce oxygen-containing functional groups on the surface of aged PS nanoplastics, improve their colloidal stability in NaCl solution, but promote their aggregation in the presence of Ca 2+ (Liu et al 2019).…”

Section: Topic 7: Environmental Fate Of Microplasticsmentioning

confidence: 99%

Topic modeling discovers trending topics in global research on the ecosystem impacts of microplastics

Gong,

Hu,

Zhang

et al. 2023

Preprint

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The ecological threats of microplastics have sparked research worldwide. However, changes in the topics of microplastic research over time and space have not been evaluated quantitatively, making it difficult to identify the next frontiers. Here, we apply topic modeling to assess global spatiotemporal dynamics of microplastic research. We identified nine leading topics in current microplastic research. Over time, microplastic research topics have switched from aquatic to terrestrial ecosystems, from distribution to fate, from ingestion to toxicology, and from physiological toxicity to cytotoxicity and genotoxicity. In most of the nine leading topics, a disproportionate amount of independent and collaborative research activity was conducted in and between a few developed countries which is detrimental to understanding the environmental fates of microplastics in a global context. This review recognizes the urgent need for more attention to emerging topics in microplastic research, particularly in regions that are heavily impacted but currently overlooked.

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Enhanced biotoxicity by co-exposure of aged polystyrene and ciprofloxacin: the adsorption and its influence factors

Li,

Lan,

Wang

et al. 2024

Environ Geochem Health

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The heteroaggregation behavior of nanoplastics on goethite: Effects of surface functionalization and solution chemistry

Cited by 19 publications

References 51 publications

Mineral Morphology-Mediated Interaction of Boehmite with Polystyrene Nanoplastics (PSNPs) and Validation in an Aqueous Environment

Mineral Morphology-Mediated Interaction of Boehmite with Polystyrene Nanoplastics (PSNPs) and Validation in an Aqueous Environment

Topic modeling discovers trending topics in global research on the ecosystem impacts of microplastics

Enhanced biotoxicity by co-exposure of aged polystyrene and ciprofloxacin: the adsorption and its influence factors

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