Browse > Article
http://dx.doi.org/10.11629/jpaar.2022.18.3.079

Filtration Efficiency of Granular Activated Carbons to Polydisperse Ultrafine Particles through the Surface Adsoprtion  

Cho, Kyungil (School of Civil and Environmental Engineering, Pusan National University)
Kang, Giwon (School of Civil and Environmental Engineering, Pusan National University)
Shin, Jiyoon (School of Civil and Environmental Engineering, Pusan National University)
Kim, Changhyuk (School of Civil and Environmental Engineering, Pusan National University)
Publication Information
Particle and aerosol research / v.18, no.3, 2022 , pp. 79-86 More about this Journal
Abstract
Many commercial air purifiers currently have deployed granular activated carbon (GAC) filters for removing volatile organic compounds in the indoor air. GACs are generally used to remove gaseous contaminants in the air through adsorption by the inner surfaces of pores. In addition, airborne particles can be also filtered by the surface adsorption of the GACs, which can improve the life-time of the particulate filters. In this study, the filtration efficiency of GACs to ultrafine particles through surface adsorption was investigated at different volume flow rates by deploying a continuous particle filtration system. The polydisperse sodium chloride (NaCl) particles were generated by a set of an atomizer and a diffusion dryer, and then mixed with particle-free air at different volume flow rates. The penetration of ultrafine particles and pressure drop for each experimental condition were measured to figure out the effect of the volume flow rate on the surface adsoprtion of the GACs to particles, ~ 2 mm. The particle filtration efficiency of the GACs decreased as the volume flow rate increased from 4 to 14 lpm. However, the 5 times thicker GAC filter layer decreased the penetration of ultraparticles than a preious study. The filtration efficiency of the single granule was also higher than the previous result in the literature with smaller granule filter materials.
Keywords
filtration efficiency; granular activated carbon; ultrafine particles; surface adsorption;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Wang, J., Chen, D. and Pui, D. (2007). Modeling of filtration nanoparticles in standard filter media, Journal Nanoparticle Research, 9, 109-115.   DOI
2 Kim, C., Lee, H., Juelfs, A., Haynes, C. and Pui, D. (2017). The effect of filtered nanoparticles on gas filtration efficiency of granular activated carbons, Carbon, 121, 63-71.   DOI
3 Lee, K. and Gieseke J. (1979). Collection of aerosol particles by packed beds, Environmental Science and Technology, 13, 466-470.   DOI
4 Mugisidi, D., Ranaldo, A., Soedarsono, J. and Hikam, M. (2007). Modification of activated carbon using sodium acetate and its regeneration using sodium hydroxide for the adsorption of copper from aqueous solution, Carbon, 45, 1081-1084.   DOI
5 Tennant, M. and Mazyck, D. (2007). The role of surface acidity and pore size distribution in the adsorption of 2-methylisoborneol via powdered activated carbon, Carbon, 45, 858-864.   DOI
6 Qiu, G. and Guo, M. (2010). Quality of poultry litter-derived granular activated carbon, Bioresouce Technology, 101(1), 379-386.   DOI
7 Hamra, G. B., Guha, N., Cohen, A., Laden, F., Raaschou-Nielsen, O., Samet, J. M., Vineis, P., Forastiere, F., Saldiva, P., Yorifuji, T., and Loomis, D. (2014). Outdoor particulate matter exposure and lung cancer: A systematic review and meta-analysis, Environmental Health Perspectives, 122(9), 906-911.   DOI
8 Kim, S., Harrington M. and Pui, D. (2007). Experimental study of nanoparticles penetration through commercial filter media, Journal Nanoparticle Research, 9, 117-125.
9 Kim, C. and Pui, D. (2015a). Experimental study on the filtration efficiency of activated carbons for 3-30 nm particles, Carbon, 93, 226-229.   DOI
10 Kim, C., Zuo, Z., Finger, H., Haep, S., Asbach, C., Fissan, H. and Pui, D. (2015b). Soft X-ray-assisted detection method for airborne molecular contaminations (AMCs), Journal of Naoparticle Research, 17(3), 126.   DOI
11 Kim, C., Kang, S. and Pui, D. (2016). Removal of airborne sub-3 nm particles using fibrous filters and granular activated carbons, Carbon, 104, 125-132..   DOI