关于微塑料老化及其对基酸吸附的影响的实验室研究
Sílvia D Martinho1,2, Vírgínia Cruz Fernandes1, Sónia A Figueiredo1
1REQUIMTE/LAQV-ISEP, Polytechnic of Porto, Rua Dr. António Bernandino de Almeida 431, 4249-015 Porto, Portugal.
Polymers
|August 26, 2023
概括
环境的气候变化改变了微塑料,增加了它们吸附污染物的能力,如农药pyrifos. 陈旧的微塑料呈现出增强的污染物吸收,突出显示了环境风险.
科学领域:
- 环境科学 环境科学
- 聚合物科学 聚合物科学
- 分析化学 分析化学
背景情况:
- 微塑料 (MP) 经历环境老化,改变其物理和化学特性.
- 老龄化增强了MP携带共同污染物的能力,引发了环境问题.
- 了解MP老化对于评估其对环境的影响至关重要.
研究的目的:
- 模拟和评估水生环境中六种常见的微塑料的老化过程.
- 研究老化对MP表面特征和化学结构的影响.
- 评估衰老对微塑料中pyrifos (CPF) 吸附的影响.
主要方法:
- 六种MP类型 (聚胺6,PVC,LDPE,聚烯,PEVA,聚烯) 在淡水和海水中实验室规模的老化.
- 使用光学显微镜,FTIR-ATR,拉曼光谱和TGA进行表征.
- 批量吸附研究以确定原始和老年MP的CPF吸收.
主要成果:
- 紫外线暴露诱导化学变化 (子,基团) 和表面修饰 (孔隙,粗) 在老年MP.
- TGA揭示了老年MP的最大体重减轻温度的变化.
- 微塑料的老化显著增加了pyrifos的吸附能力,MP类型之间有不同的亲和力.
结论:
- 环境气候变化改变了MP的特性,增强了它们吸收污染物的潜力.
- 年龄较大的MP显示出对CPF等农药的吸附能力增加.
- 这些发现凸显了受气候变化影响的微塑料带来的不断变化的环境风险.
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