在不同pH值,温度和盐度条件下,加速紫外衰老的PET和PP微塑料对Pb的吸附行为 (II)

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Vijaykumar Sekar¹, Baranidharan Sundaram¹

¹Department of Civil Engineering, National Institute of Technology Andhra Pradesh, India.

The Science of the total environment

|December 20, 2025

概括

紫外线老化显著提高了像PET和PP这样的微塑料 (MP) 吸附的能力. 这个过程创造了新的吸附点,在各种环境条件下增加了金属吸收.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
分析化学分析化学

背景情况:

微塑料 (MP) 是一种持久性环境污染物.
紫外线辐射的气候变化改变了MP表面的特性,影响了污染物吸附.
了解重金属 (HM) 吸附在经过气候变化的MP上对于环境风险评估至关重要.

研究的目的:

研究紫外线老化对 (Pb(II)) 吸附在聚乙烯二甲 (PET) 和聚烯 (PP) 微塑料上的影响.
分析环境参数 (pH,盐度,温度) 对Pb (II) 吸附在老年MPs上的影响.
阐明Pb的吸附机制和动力学在紫外线老化MPs上.

主要方法:

对PET和PP微塑料进行长达30天的紫外线老化.
使用FESEM进行表面表征,接触角度测量,FTIR和XRD.
在不同条件下进行批量吸附实验,以确定Pb的吸收能力.
动力和同热模拟 (伪二阶,兰木尔).

主要成果:

紫外线老化增加了MP的表面粗性,裂纹和水友性,产生了新的功能组 (碳,) 并增加了结晶性.
Pb(II) 吸附能力显著增加在老年议员与处女议员相比.
在24小时内达到吸附平衡,在pH值9和中等温度 (15-25°C) 的最佳条件下.
吸附遵循伪二阶动力学和兰迈尔异热模型,表明化学吸附和单层吸附.

结论:

紫外线老化增强了PET和PP微塑料对的吸附潜力.
环境因素显著影响Pb(II) 吸附到老年MP.
该研究提供了关于重金属吸附在经过气候变化的微塑料上的机制的关键见解,这与环境修复和风险评估有关.

关键词:

吸附方式吸附方式吸附方式化学吸收的化学吸收领导领导领导领导领导微塑料是一种微塑料.紫外线衰老的日光衰老

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