分子层洞察自然有机物对纳米塑料-小分子新兴污染物相互作用的影响
Huan Tang1,2,3, Wenhu Song1,2,3, Ruotong Li1,2,3
1Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China.
Langmuir : the ACS journal of surfaces and colloids
|October 25, 2025
概括
自然有机物 (NOM) 显著影响新兴污染物 (ECs) 与聚乙烯纳米塑料 (PSNPs) 的相互作用. NOM可以增强原始PSNP的EC吸附,但减少老PSNP的EC吸附,从而影响水生环境中的污染物行为.
科学领域:
- 环境化学环境化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 新兴污染物 (ECs) 在水生系统中普遍存在,需要了解它们的复杂相互作用.
- 聚乙烯纳米塑料 (PSNPs) 越来越多地被认为是EC的载体.
- 自然有机物 (NOM) 是水生环境中无处不在的组成部分,可以影响污染物的命运.
研究的目的:
- 研究各种EC (包括PCB,BPS,PHE,SM2,DDT,PFOS) 在原始和老PSNP上的吸附行为.
- 阐明NOM在调解PSNP和EC之间的相互作用中的作用.
- 了解受NOM影响的EC吸附和转移的机制.
主要方法:
- 吸附实验使用原始和老化的PSNP与一组EC在NOM的存在和缺席下进行.
- 分析的重点是PSNP特性 (原始与老化) 和NOM对吸附机制的影响.
- 研究了关键机制,如NOM的构造变化和相互作用强度.
主要成果:
- 纯净的PSNP吸收非极性EC,而老化的PSNP吸收极性EC.
- 诺姆改变了吸附机制,通过桥梁和保护作用促进了EC转移到原始PSNP.
- 通过竞争性吸附,NOM在老PSNPs上降低了某些EC (例如PCB,DDT) 的吸附.
结论:
- PSNP的表面特性 (原始与老化的) 决定了它们对不同类型的EC的亲和力.
- 在调节PSNP-EC相互作用方面,NOM发挥着关键的,多方面的作用,影响污染物的流动性和稳定性.
- 了解这些复杂的相互作用对于准确评估水生生态系统中ECs的环境风险至关重要.
相关概念视频
Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
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 Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
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...
Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
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...


