从原子学角度了解纳米塑料和新类杀虫剂之间的共同吸附机制
Erwin García-Hernández1, F Javier Torres2, Diego Cortés-Arriagada3
1Tecnológico Nacional de México / Instituto Tecnológico Superior de Zacapoaxtla, 73680, Zacapoaxtla, Puebla, México. erwin.gh@zacapoaxtla.tecnm.mx.
Journal of molecular modeling
|April 15, 2025
概括
这项研究揭示了像PET,PE和PS这样的纳米塑料如何与新烟类杀虫剂 (IMI,CLO) 相互作用. 静电和分散力驱动物理吸收,PE-IMI复合体显示出最高的稳定性,影响农药的环境命运.
科学领域:
- 环境化学环境化学
- 计算化学的计算化学
- 材料科学 材料科学 材料科学
背景情况:
- 纳米塑料 (NP) 是新兴的环境污染物.
- 尼可类杀虫剂 (NEO) 是广泛使用的杀虫剂.
- 了解NP-NEO相互作用对于环境风险评估至关重要.
研究的目的:
- 通过密度函数理论阐明纳米塑料-尼类杀虫剂复合物的共吸附机制.
- 为了研究不同类型的纳米塑料 (PET,PE,PS) 和新烟类 (IMI,CLO) 在吸附中的作用.
- 确定主要的相互作用力及其对复杂稳定性的贡献.
主要方法:
- 在wB97XD/def2-SVP层面的密度函数理论 (DFT) 计算.
- 包括PCM,BSSE和分散校正.
- 分析电子属性 (HOMO,LUMO,能量差距) 和相互作用能量.
- 原子局部分子轨道扩展数据分析 (ALMO-EDA) 和分子间网格冲突 (IGMH) 分析.
主要成果:
- 所有测试的纳米塑料 (PET,PE,PS) 都倾向于捐赠电子.
- PET和CLO支持电子接受,而PE,PS和IMI表现出不稳定性.
- 静电和分散相互作用通过物理吸收对NP-NEO复合体稳定有 ~90% 的贡献.
- 吸附能量在 -18.32 到 -32.56 kcal/mol 之间,PE-IMI 是最稳定的复合体.
- 在PE-IMI和PE-CLO复合体中观察到LUMO-HOMO差距的显著减少 (~28%),表明稳定性下降.
结论:
- 这项研究为农药-纳米塑料相互作用提供了分子层面的见解.
- 由静电和分散力驱动的物理吸收是主要的机制.
- PE-IMI复合体表现出最高的吸附稳定性.
- 这些发现有助于了解在纳米塑料存在下,类类药物的环境命运.
相关概念视频
Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
Microbial Corrosion
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...


