日光老化对环境微塑料理化性质和吸附能力的影响:对多环芳烃污染的影响。

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Kenshi Sankoda, Koki Saito
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引用次数: 0

摘要

本研究研究了紫外线老化对环境中常见的三种塑料:聚乙烯(PE)、聚丙烯(PP)和聚苯乙烯(PS)的物理化学性质和吸附能力的影响。一组塑料样品暴露在基于x的模拟阳光下长达5天,另一组暴露在室外条件下长达69天。对原始塑料颗粒和老化塑料颗粒的物理化学性质和吸附多环芳烃(PAH)芘的能力进行了评价。对于室外暴露的PP和PS样品,检测到与羰基相关的明显的傅里叶变换红外峰。经室外暴露69 d的PE和PP样品经搅拌72 h后对芘的吸附系数分别比原始样品高2.9倍和3.5倍。这种吸附能力的增加可能归因于这些塑料表面性能的变化,包括脆化。研究结果表明,在老化材料表面,多环芳烃在微塑料上的积累加速,强调需要在模拟自然阳光照射的条件下进行进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of sunlight aging on physicochemical properties and sorption capacities of environmental microplastics: implications for contamination by PAHs

This study investigates the effects of ultraviolet (UV) aging on the physicochemical properties and adsorption capacity of three plastics commonly detected in the environment: polyethylene (PE), polypropylene (PP), and polystyrene (PS). One set of plastic samples was exposed to Xe-based simulated sunlight for up to 5 days and another set to outdoor conditions for up to 69 days. The physicochemical properties and ability of the pristine and aged plastic particles to adsorb pyrene, a representative polycyclic aromatic hydrocarbon (PAH), are evaluated. For the outdoor-exposed PP and PS samples, distinct Fourier transform infrared peaks related to carbonyl groups are detected. The adsorption coefficients of pyrene after 72 h of agitation in PE and PP samples aged via 69 days of outdoor exposure are 2.9 and 3.5 times higher compared with that in the respective pristine samples. This increase in adsorption capacity is probably attributed to these plastics undergoing changes in surface properties, including embrittlement. The findings indicate that the accumulation of PAHs on microplastics is accelerated on aged material surfaces, emphasizing the need for further studies under conditions that simulate natural sunlight exposure.

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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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