Behavior and mechanisms of ciprofloxacin adsorption on aged polylactic acid and polyethlene microplastics

Liang, Jinni; Wu, Jiahui; Zeng, Zhi; Li, Manzhi; Liu, Weizhen; Zhang, Taiping

doi:10.1007/s11356-023-26390-x

Cited by 17 publications

(2 citation statements)

References 53 publications

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“…The position of absorption peaks at these features after aging did not change signi cantly; however, the absorption peaks' strengths were noticeably higher, suggesting that the oxygen-containing functional groups on MPs' surfaces increased as a result of UV aging, and improved their adsorbability(Li et al 2022). It is evident from the examination and comparison of the PLA functional groups after aging that the pinnacle of the O-H stretching vibration absorption was located at 3449 cm -1 , the stretching vibration absorption peak of -CH 2 is located at 3000 cm -1 , and the stretching vibration of C = O was responsible for the feature peak at 1755 cm -1(Fan et al 2023, Liang et al 2023). The two absorption peaks of the aged PLA at 3449 and 1755 cm -1 exhibited noticeably increased intensities, indicating that PLA reacted with oxygen in air under UV irradiation and generated additional functional groupings containing oxygen.…”

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confidence: 99%

Adsorption properties and mechanism of Cu(Ⅱ) on virgin and aged microplastics in the aquatic environment

Hu,

Xiao,

Jiang

et al. 2023

Preprint

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Microplastics (MPs) bind to heavy metals in the aquatic environment and move into groups as carriers. They are prone to aging due to UV irradiation, which affects their adsorbability and mechanisms. The physicochemical properties Polyamide ( PA ) and polylactic acid ( PLA ) MPs were characterized. The impact and mechanism of UV aging on the adsorption of typical Cu(II) contaminants by MPs were investigated. The findings demonstrated that UV aging increased the specific surface area (SBET) and amount of oxygen-functional groups, decreased crystallinity, and generated pits on superficies of the MPs. Before and after aging, the adsorption behavior of the MPs on Cu(II) complied with the pseudo-second-order and Langmuir isotherm models. The primary adsorption processes, which were predominantly single-layer chemical reactions, were liquid-film and intra-particle diffusion. Compared to virgin MPs, the aged MPs had a higher adsorbability, which was primarily explained by the electrostatic attraction and complexation of the oxygen-functional groups with Cu(II). Cu(Ⅱ) adsorption by MPs was significantly affected by pH and salinity. At pH 5, the maximum adsorbability was noted, and increasing salinity reduced the MPs' ability to bind Cu(II). The equilibrium Cu(Ⅱ) adsorbability and MPs dosage were negatively correlated. These findings provide a scientific foundation for ecological environment risk assessment when MPs coexist with heavy metals.

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confidence: 99%

Adsorption properties and mechanism of Cu(Ⅱ) on virgin and aged microplastics in the aquatic environment

Hu,

Xiao,

Jiang

et al. 2023

Preprint

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“…These observations suggest that the efficiency of CIP adsorption is influenced by the initial concentration of adsorbate. However, the reasons for increase in adsorption of CIP with increase in initial concentration may depend on the specific experimental conditions and the characteristics of the adsorbent used (Liang et al, 2023). But generally, it is expected that increasing the initial concentration of adsorbate would lead to more favorable interactions between CIP molecules and active sites on the adsorbent surface.…”

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confidence: 99%

Green synthesis of iron (III) oxide (Fe3O4) Nanoparticles Using Citrus sinensis Peel Extract for the Removal of Ciprofloxacin in Water

Faruruwa,

Adamu,

Adeyemi

et al. 2024

jasem

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Ciprofloxacin is a widely used antibiotic that can contaminate water sources and pose environmental and health risks. Therefore, the objective of this paper is to explore the green synthesis of iron (III) oxide nanoparticles using Citrus sinensis peel extract for the removal of ciprofloxacin in water using standard techniques. The adsorption of ciprofloxacin on the nanoparticles was investigated under different conditions, such as pH, initial concentration of adsorbate, contact time, and different adsorbent doses. The adsorption data were fitted to different isotherm and kinetic models to understand the adsorption mechanism and parameters. The results of characterization revealed the particles to be of nanocrystalline structure with a cubic crystal shape, negative surface charge, and a high thermal stability with elemental composition primarily of Fe and O; it has z- average of 42.60, with Fe-O bond at 693.30cm-1 and UV-Visible absorbance at 221nm. The maximum adsorption capacity with ciprofloxacin was 29.21 mg/g (97.45%) at pH of 7 and room temperature of 25 °C. The results of the adsorption data indicated that the adsorption followed the Langmuir isotherm model and the pseudo-second-order kinetic model, suggesting a monolayer adsorption on a homogeneous surface with a finite number of identical sites. The synthesized nanoparticles showed a high efficiency and selectivity for the removal of ciprofloxacin from water, demonstrating it potential as an eco-friendly and low-cost adsorbent for water purification.

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Ecotoxicological Effects of Microplastics Combined With Antibiotics in the Aquatic Environment: Recent Developments and Prospects

Du,

Huang,

Pan

et al. 2024

Enviro Toxic and Chemistry

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Both microplastics and antibiotics are commonly found contaminants in aquatic ecosystems. Microplastics have the ability to absorb antibiotic pollutants in water, but the specific adsorption behavior and mechanism are not fully understood, particularly in relation to the impact of microplastics on toxicity in aquatic environments. We review the interaction, mechanism, and transport of microplastics and antibiotics in water environments, with a focus on the main physical characteristics and environmental factors affecting adsorption behavior in water. We also analyze the effects of microplastic carriers on antibiotic transport and long‐distance transport in the water environment. The toxic effects of microplastics combined with antibiotics on aquatic organisms are systematically explained, as well as the effect of the adsorption behavior of microplastics on the spread of antibiotic resistance genes. Finally, the scientific knowledge gap and future research directions related to the interactions between microplastics and antibiotics in the water environment are summarized to provide basic information for preventing and treating environmental risks. Environ Toxicol Chem 2024;00:1–12. © 2024 SETAC

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Behavior and mechanisms of ciprofloxacin adsorption on aged polylactic acid and polyethlene microplastics

Cited by 17 publications

References 53 publications

Adsorption properties and mechanism of Cu(Ⅱ) on virgin and aged microplastics in the aquatic environment

Adsorption properties and mechanism of Cu(Ⅱ) on virgin and aged microplastics in the aquatic environment

Green synthesis of iron (III) oxide (Fe3O4) Nanoparticles Using Citrus sinensis Peel Extract for the Removal of Ciprofloxacin in Water

Ecotoxicological Effects of Microplastics Combined With Antibiotics in the Aquatic Environment: Recent Developments and Prospects

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