Aerosol particle scavenging by droplets is commonly seen in workplaces as a process of air depollution, but it is used in an empirical way. Although many studies have been conducted on this process, there is still a lack of data concerning its efficiency in the field of occupational health. Thus, an experimental study is presented in this paper, where a mist is sprayed in counter-current to an ascending aerosol of alumina using commercial nozzles. The influence of various parameters on the spectral and total collection efficiency is studied. It is put in evidence that the collection of particles above the micron takes place mainly on the first tens of centimeters. Although an increase in the liquid flow rate and the positioning height lead to a better collection efficiency, the droplet diameter seems to be a predominant parameter to take into account. From the results, recommendations are thus proposed to optimize the aerosol collected by droplets. It is also shown that a simple impaction model can be used to predict the scavenging of aerosol particles, despite the strong assumptions.

通过飞沫清除气溶胶颗粒在工作场所中通常被视为一种空气净化过程，但它是以经验方式使用的。尽管对此过程进行了许多研究，但仍缺乏有关其在职业健康领域效率的数据。因此，本文提出了一项实验研究，其中使用商业喷嘴将雾气与上升的氧化铝气溶胶逆流喷射。研究了各种参数对光谱和总收集效率的影响。有证据表明，微米以上粒子的收集主要发生在最初的几十厘米。虽然增加液体流速和定位高度会带来更好的收集效率，液滴直径似乎是需要考虑的主要参数。根据结果​​，因此提出了优化液滴收集的气溶胶的建议。还表明，尽管有很强的假设，但可以使用简单的撞击模型来预测气溶胶颗粒的清除。