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解读硫甲醇与水生环境中的可生物降解与常规,原始与老化微塑料的相互作用

Chenghui Luo¹, Xiuyun Shao², Jiachao Shen³

¹State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.

Journal of environmental sciences (China)

|July 2, 2025

概括

可生物降解的微塑料,特别是老化聚乳酸 (PLA),表现出比传统类型更高的硫甲醇 (SMX) 吸附率. 衰老通过增加表面氧基来增强吸附,影响环境风险评估.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
环境科学环境科学

背景情况:

药品和微塑料 (MP) 的同时暴露加剧了水污染.
有限的研究存在于生物降解的MPs对药物的吸附.
微塑料作为各种环境污染物的载体.

研究的目的:

为了研究传统 (聚乙烯,PET) 和生物降解 (PLA,PBS) MPs 的硫甲醇 (SMX) 的吸附行为.
分析衰老 (紫外线处理) 对MP特性和SMX吸附的影响.
为了阐明所涉及的吸附机制.

主要方法:

使用聚钢,PET,PLA和PBS微塑料与SMX进行吸附实验.
针对形态,结晶性,疏水性和结构的变化,对年龄较大的MP进行表征 (UV处理).
通过相互作用分析 (静电,疏水,结合) 分析吸附机制.

主要成果:

紫外线衰老的MPs由于表面含氧功能组的增加而增加了SMX吸附,除了PLA.
聚乳酸 (PLA) 呈现出最高的吸附能力,这是由于其疏水性和孔径大小.
聚乙烯酸 (PBS) 由于水友性和小孔径,显示了最低的SMX亲和力;老化的可生物降解MP超越了非可降解MP.

结论:

对于SMX,MP的吸附能力受材料类型,老化和表面特性的影响.
静电和水相互作用主导处女MP吸附,而老化的MP则涉及键和静电相互作用.
这些发现对于理解SMX-MP联合运输和生态风险评估至关重要.

关键词:

吸附机制是一种吸附机制.衰老的衰老衰老的衰老水生环境水生环境微塑料是一种微塑料.硫甲佐 (sulfamethoxazole) 是一种硫甲佐 (sulfamethoxazole) 的一种化合物.

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