Enhanced sorption of the UV filter 4-methylbenzylidene camphor on aged PET microplastics from both experimental and theoretical perspectives

Shih, Chang-tai; Wang, Yu-Hsiang; Chen, Yi–Ju; Chen, Hsin‐An; Lin, Angela Yu-Chen

doi:10.1039/d1ra05013c

Cited by 13 publications

(3 citation statements)

References 85 publications

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“…The infrared spectrum provides valuable insights into the structural composition of various polymers and their functional groups, as outlined in Figure 3 . A distinct peak between 1100 and 1000 cm⁻ 1 , indicating C–O–C bond stretching, alongside peaks at 1500–1600 cm⁻ 1 , representing its aromatic ring structure, and peaks at 1700–1725 cm⁻ 1 for carbonyl groups (C=O) in the ester linkage translate to PET MPs [ 50 ]. Additionally, peaks near 1000 cm⁻ 1 , denoting CH 2 group stretching, with additional peaks at 1600–1700 cm⁻ 1 for C–H bending, and strong peaks at 2850–2917 cm⁻ 1 , reflecting C–H bond stretching in the polymer backbone, indicate the presence of HDPE MPs [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

Microplastic Contamination of Non-Mulched Agricultural Soils in Bangladesh: Detection, Characterization, Source Apportionment and Probabilistic Health Risk Assessment

Sharmin,

Wang,

Islam

et al. 2024

JoX

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Microplastic contamination in agricultural soil is an emerging problem worldwide as it contaminates the food chain. Therefore, this research investigated the distribution of microplastics (MPs) in agricultural soils without mulch at various depths (0–5, 5–10, and 10–15 cm) across different zones: rural, local market, industrial, coastal, and research areas. The detection of MP types and morphology was conducted using FTIR and fluorescence microscopy, respectively. Eight types of MPs were identified, including high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyvinyl fluoride (PVF), polyvinyl alcohol (PVA), and polytetrafluoroethylene (PTFE), with concentrations ranging from 0.6 ± 0.21 to 3.71 ± 2.36 MPs/g of soil. The study found no significant trends in MP concentration, with ranges of 0–2.1 ± 0.38, 0–2.87 ± 0.55, and 0–2.0 ± 0.34 MPs/g of soil at depths of 0–5 cm, 5–10 cm, and 10–15 cm, respectively. The highest MP quantity was recorded at 8.67 in coastal area, while the lowest was 6.44 in the local market area. Various MP shapes, e.g., fiber, film, pellet, fragment, and irregular, were observed across all layers. PCA suggested irrigation and organic manure as potential sources of MPs. The estimated concentrations of MPs possessed low non-carcinogenic and carcinogenic risks to the farming community of Bangladesh.

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Section: Resultsmentioning

confidence: 99%

Microplastic Contamination of Non-Mulched Agricultural Soils in Bangladesh: Detection, Characterization, Source Apportionment and Probabilistic Health Risk Assessment

Sharmin,

Wang,

Islam

et al. 2024

JoX

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“…Finally, the gas path was shortened sharply and showed helium leakage, as shown in Figure 9C. Interestingly, the helium permeability of 3216LV and FV1175 aged for 24 and 18 months, respectively, decreased to a certain extent, which may be ascribed to the crosslinking of the PET part under the comprehensive action of irradiation of ultraviolet light, moisture, and temperature alternation, which could enhance the crystallization degree (Ji-Hyun and Hee, 2018;Shih, et al, 2021;Xu, et al, 2015) and block the diffusion of helium (Figures 9A,B). Meanwhile, the better water and mildew resistance of PVDF and PVF enabled them to have efficient protection of the inner layers, which kept the PET layer working.…”

Section: Figure 10mentioning

confidence: 98%

Study of performance of aerostat envelope materials on the coast

Lv¹,

Zhou²,

Yuan

et al. 2022

Front. Mater.

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In this article, the performance of several naturally aged envelope materials in Hainan, China, was studied. The results show that the outer layer contributes to the properties of the envelope materials, where PVF and PVDF are better candidates for a weathering layer than TPU and aluminum. Due to the superior water and mildew resistance of PVF and PVDF, the loss of tensile strength for 3216LV and FV1175 was slight, whose value reduced from 101.43 ± 5.45 Kgf/cm and 76.15 ± 3.81 Kgf/cm to 79.73 ± 6.40 Kgf/cm and 70.20 ± 6.57 Kgf/cm, respectively, when aging for 24 months with the helium permeability reduction from 0.8818 L/m2•day•atm and 0.6360 L/m2•day•atm to 0.2047 L/m2•day•atm and 0.2169 L/m2•day•atm aging for 18 months, in the case of FV1175 showed leakage after aging for 24 months due to delamination. However, the tensile strength of HV150 dropped from 82.13 ± 3.61 Kgf/cm to 15.22 ± 2.16 Kgf/cm at 24 months with helium leakage, owing to heavy mildew and degradation. Meanwhile, ETAV150 also exhibited a decreased tensile strength of 57.92 ± 1.32 Kgf/cm after 6 months aging, 32.8% lower than that of the original sample, and showed leakage when aging for 12 months. This research provides a theoretical guidance for the structural design and screen of envelope materials for aerostat used along the coast.

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“…75 As such, the structural characteristics of waste PET plastic may deteriorate over time under exposure to solar radiation, temperature, 76 and mechanical stress. 77 In particular, the physical properties such as morphology, crystallinity, and surface area are primarily affected by aging. 78 The variations in chemical structures during aging result in the formation of hydroxyl groups via hydrolysis 79,80 and cyclic oligomers, especially through thermal degradation.…”

Section: Overview Of the Functional Upcycling Strategy For Different ...mentioning

confidence: 99%

“Functional upcycling” of polymer waste towards the design of new materials

et al. 2023

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Enhanced sorption of the UV filter 4-methylbenzylidene camphor on aged PET microplastics from both experimental and theoretical perspectives

Abstract: The enhanced sorption behavior of aged polyethylene terephthalate (PET) microplastics with 4-methylbenzylidene-camphor (4MBC) via hydrogen bonding is investigated through both experimental and theoretical methods.

Cited by 13 publications

References 85 publications

Microplastic Contamination of Non-Mulched Agricultural Soils in Bangladesh: Detection, Characterization, Source Apportionment and Probabilistic Health Risk Assessment

Microplastic Contamination of Non-Mulched Agricultural Soils in Bangladesh: Detection, Characterization, Source Apportionment and Probabilistic Health Risk Assessment

Study of performance of aerostat envelope materials on the coast

“Functional upcycling” of polymer waste towards the design of new materials

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