School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China.
Scanning. 2021 Apr 10;2021:6650020. doi: 10.1155/2021/6650020. eCollection 2021.
Air pollution has become a matter of close concern to people with the continuous development of human society. However, the knowledge of air pollution mechanisms remains insufficient, and there is a lack of evaluation methods for actual pollution. In this paper, air pollution in Internet cafe was studied by detecting surface topography of glass slides after different exposure time by an atomic force microscope (AFM). It is found that the adsorption of air pollutants on glass surface undergoes initial aggregation, particle growth and interparticle deposition, and final full coverage. The chemical composition of contaminated glass surface was further analyzed by an X-ray photoelectron spectrometer, showing that the pollution was mainly composed of hydrocarbons regardless of exposure time. Cleaning experiments show that NaHCO solution can be the most effective one with saponification reaction and hydrolysis to remove the adsorbed contaminations. This study provides an alternative way for investigating air pollution and a reference for cleaning polluted material surfaces.
空气污染随着人类社会的不断发展，已成为人们密切关注的问题。然而，人们对空气污染机制的认识仍然不足，也缺乏对实际污染的评估方法。本研究通过原子力显微镜（AFM）检测不同暴露时间后玻璃载玻片表面形貌，研究网吧空气中的污染物。结果表明，空气污染物在玻璃表面的吸附经历了初始聚集、颗粒生长和颗粒间沉积，最终达到完全覆盖。进一步通过 X 射线光电子能谱仪分析污染玻璃表面的化学组成，结果表明无论暴露时间如何，污染主要由碳氢化合物组成。清洁实验表明，NaHCO₃溶液可以通过皂化反应和水解最有效地去除吸附污染物。本研究为研究空气污染提供了一种替代方法，也为清洁污染材料表面提供了参考。
