湿酸与水溶液中的原始聚 (乳酸) 微塑料的相互作用
Ricardo H P Pedroza1, Calin David1, Pablo Lodeiro1
1Department of Chemistry, Physics, Environmental and Soil Sciences, University of Lleida - AGROTECNIO-CERCA Center, Rovira Roure 191, 25198 Lleida, Spain.
The Science of the total environment
|November 8, 2023
概括
研究了可生物降解的多 (乳酸) 微塑料和水中的湿酸之间的相互作用. 结果显示,PLA改变了湿酸结构,影响了水环境中的营养物质和污染物运输.
科学领域:
- 环境科学 环境科学
- 聚合物科学 聚合物科学
- 水的化学 水的化学
背景情况:
- 微塑料和天然有机物在水生系统中相互作用,影响营养物质和污染物运输.
- 了解这些相互作用至关重要,特别是对于可生物降解的塑料,如聚乳酸 (PLA).
- 缺乏对酸对PLA吸附的机械洞察力.
研究的目的:
- 为了研究商业酸在水溶液中对PLA微塑料的吸附.
- 为了确定在PLA上吸附动力学和酸的平衡.
- 为了阐明与PLA相互作用后的湿酸的结构变化.
主要方法:
- 使用PLA微塑料和商业酸进行了吸附实验.
- 应用了动力模型 (伪二次,埃洛维奇) 和平衡模型 (朗穆尔).
- 福利埃变换红外光谱法 (FTIR),EEM光和PARAFAC被用来进行表征.
主要成果:
- 吸附动力学最好用伪二阶模型来描述,这表明化学吸附可能是限制速度的.
- 兰迈尔模型适合平衡数据,产生0.118 mg·g-1.1的最大吸附能力.
- 物理吸收似乎控制了酸对PLA的吸附,受静电相互作用和聚合的影响.
- 酸改变了酸的分子结构,可能是通过结和疏水相互作用的变化.
结论:
- 聚 (乳酸) 微塑料与湿酸相互作用,影响其分子结构.
- 这些相互作用是由静电力和聚合驱动的,影响水生系统中有机物质的行为.
- 该研究提供了对可生物降解微塑料和相关有机物质的环境命运的关键见解.
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