Abstract

Estimates for the acidity of aerosol particles in the rural atmosphere over Wingene (Belgium) are presented. The results of processing monitoring data using data of the control of meteorological conditions, gas impurities, ion composition, and mass concentration of aerosol particles, as well as the use of thermodynamic methods showed that the level of acidity of aerosol particles in the atmosphere is unexpectedly high (\(\mathrm{pH}\approx 3.5{-}4.3\)) despite their sampling in the background area. It is found that the variability of particle acidity is mainly determined by fluctuations in relative humidity and the content of gas-phase ammonia in the air. In this case, the lower the relative humidity is, the higher the acidity of particles is, which reflects the variability of moisture content in particles and the solubility of ammonium nitrate.

中文翻译：

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农村大气中气溶胶颗粒的酸度

摘要

本文介绍了 Wingene（比利时）上空农村大气中气溶胶颗粒的酸度估计值。利用气象条件、气体杂质、离子组成、气溶胶粒子质量浓度控制数据以及热力学方法处理监测数据的结果表明，大气中气溶胶粒子的酸度水平出人意料。高 ( \(\mathrm{pH}\约 3.5{-}4.3\)) 尽管他们在背景区域进行了采样。研究发现，颗粒酸度的变化主要取决于相对湿度的波动和空气中气相氨的含量。在这种情况下，相对湿度越低，颗粒的酸度越高，这反映了颗粒中水分含量的可变性和硝酸铵的溶解度。