Simonas Kecorius  1,2, Leizel Madueño This email address is being protected from spambots. You need JavaScript enabled to view it.2,3, Susanne Sues1, Josef Cyrys1, Mario Lovrić4, Mira Pöhlker3, Kristina Plauškaitė2, Lina Davulienė2, Agnė Minderytė2, Steigvilė Byčenkienė2 

1 Institute of Epidemiology, Helmholtz Zentrum München, 85764 Neuherberg, Germany
2 Center for Physical Sciences and Technology (FTMC), LT-10257 Vilnius, Lithuania
3 Leibniz-Institute for Tropospheric Research, 04318 Leipzig, Germany
4 Centre for Applied Bioanthropology, Institute for Anthropological Research, 10000 Zagreb, Croatia


Received: March 14, 2023
Revised: September 15, 2023
Accepted: January 12, 2024

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.230057  


Cite this article:

Kecorius, S., Madueño, L., Sues, S., Cyrys, J., Lovrić, M., Pöhlker, M., Plauškaitė, K., Davulienė, L., Minderytė, A., Byčenkienė, S. (2024). Development of a Cost-effective Adsorption Dryer for High-quality Aerosol Sampling. Aerosol Air Qual. Res. 24, 230057. https://doi.org/10.4209/aaqr.230057


HIGHLIGHTS

  • Commercially available aerosol sample dryers are often too expensive.
  • Cost-effective adsorption dryer was developed and tested.
  • Desiccant regeneration does not require disassembly of the dryer.
  • The design of the dryer allows an easy scalability.
  • The dryer can be used with low-cost sensors for aerosol measurements.
 

ABSTRACT


Due to their affinity to water, physical-chemical properties of aerosol particles depend highly on the ambient relative humidity (RH). Aerosol drying below 40% RH is recommended to minimize measurement artifacts, increase data quality, and make results from different environments comparable. Diffusion dryers (DD) are one of the most frequently used tools to lower RH in sampled air. This work presents a custom-built DD, its design, construction, and application. By using readily available materials and 3D printing, we were able to manufacture a high-quality, cost-effective DD that can be used in various measurement scenarios (e.g., long-term measurements, intensive field campaigns, laboratory studies, and applications with low-cost sensors). The DD is equipped with ports for desiccant regeneration using clean and dry air, eliminating the need for desiccant removal from the dryer. The field tests of the proposed DD showed that it could reduce RH from ambient 65% to < 5 and 15% at flow rates of 2.5 and 8.0 L min1, respectively. The transmission efficiency (TE) of 10–20 nm and > 20 nm aerosol particles is between 60–80% and > 80%, respectively. The presented DD is easily scalable, thus, can be adapted for multiple applications at a low cost without compromising the data quality.


Keywords: Atmospheric aerosol particles, Data quality assurance, Aerosol drying, Aerosol measurement, Diffusion dryer




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