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微塑料抑制了与沉积物组成部分的结合:表面功能组和充电环境的影响

Xiao Lu¹, Lijuan Wang², Jiawei Li²

¹Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, PR China; School of Chemical Engineering, The University of Adelaide, Adelaide SA 5005, Australia.

|April 25, 2025

概括

聚乙烯微塑料显著抑制了吸附到沉积物颗粒上,如石和石-酸复合物. 这种竞争影响水生环境中的重金属迁移和转化.

科学领域:

环境化学环境化学
地质化学地质化学
材料科学材料科学材料科学

背景情况:

在沉积物中共存的重金属和微塑料构成环境风险.
在三元沉积物-微塑料-重金属系统中的相互作用尚未完全理解.
不同的共存序列需要全面的调查.

研究的目的:

系统地研究 (Pb),聚乙烯 (PS) 微塑料和沉积物 (甲基和甲基-酸) 在不同的共存顺序下的相互作用.
阐明不同沉积物矩阵中PS抑制Pb吸附的背后机制.
为了解微塑料和重金属的环境命运提供理论基础.

主要方法:

在不同的共存顺序下对Pb,PS和沉积物相互作用进行系统的研究.
吸附动力学和水化学条件的分析.
X射线光电子光谱 (Pb 4f解卷) 用于确定表面相互作用.
评估Pb吸附行为和Pb-O含量变化.

主要成果:

聚乙烯 (PS) 显著抑制了 (Pb) 吸附到戈伊 (Goe) 和戈伊-酸 (GH) 复合材料上.
在Goe系统中,PS减少了静电排斥,增加了Pb质量转移率,但由于基组的竞争,吸附率降低了7.4%.
在GH系统中,PS和酸之间的疏水性相互作用和复合抑制了Pb吸附率为28.0%,通过对氧基和氧基的竞争.

结论:

聚乙烯微塑料对和酸对的吸附具有显著的抑制作用.
了解这些相互作用对于预测沉积物中的重金属和微塑料的迁移和转变至关重要.
这项研究为共存污染物的复杂环境行为提供了必要的见解.

关键词:

哥斯提人哥斯提人是一个哥斯提人.戈伊 - 酸复合物戈伊 - 酸复合物互动互动互动互动领导领导领导领导领导微塑料是一种微塑料.

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