Adsorption and toxicity characteristics of ciprofloxacin on differently prepared polyethylene terephthalate microplastics from both experimental and theoretical perspectives

Enyoh, Christian Ebere; Wang, Qingyue

doi:10.1016/j.jwpe.2023.103909

Cited by 15 publications

(1 citation statement)

References 45 publications

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“…These minute particles have a much larger specific surface area compared to MPs. Previous studies have shown that the adsorption capacity increases with specific surface area [ 38 ]. Therefore, despite the difference in particle size, the MPs in this study exhibited a similar amount of PAHs adsorption as the suspended matter, indicating that MPs have a higher affinity for PAHs than suspended matter.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Microplastics and Adsorbed/Dissolved Polycyclic Aromatic Hydrocarbons in the Biggest River System in Saitama and Tokyo, Japan

Wang,

Yamada,

Enyoh

et al. 2024

Nanomaterials

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This study presents a comprehensive characterization of microplastics (MPs) and adsorbed/dissolved polycyclic aromatic hydrocarbons (PAHs) in the Arakawa River, the largest river system in Saitama and Tokyo, Japan. The MPs were sampled at various points along the river, revealing an average number density of 2.21 ± 1.48 pieces/m3, with a predominant size range of 0.5–1 mm. Polymer analysis indicated that polyethylene (PE) comprised the highest proportion of MPs (55.9%), followed by polypropylene (PP) (22.4%) and polystyrene (PS) (21.7%). Seasonal fluctuations in MPs concentration were observed, with the highest values in winter and the lowest in summer. An analysis of adsorbed PAHs revealed a median partition coefficient (Kd) value of 3.58 × 104 L/kg for MPs, indicating their affinity for PAHs. Further PAHs analysis revealed that the PAHs with the highest mean values were bicyclic naphthalene, pyrene, and fluoranthene. A comparison with coastal MPs showed differences in PAH composition, with higher proportions of high-ring PAHs observed in coastal samples. The study also investigated the distribution of PAHs in the dissolved and suspended states in the river, finding that similar PAHs were distributed in both states, with the PAHs present in MPs being about 1/10,000 of those in the dissolved and suspended states. The study underscores the importance of the continued monitoring and management of MPs and associated pollutants in river ecosystems.

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Section: Resultsmentioning

confidence: 99%