Anand Kumar, Tarun Gupta

  • Environmental Engineering and Management Program and APTL, CESE, Indian Institute of Technology Kanpur, Kanpur - 208016, India

Received: November 28, 2014
Revised: January 13, 2015
Accepted: January 15, 2015
Download Citation: ||https://doi.org/10.4209/aaqr.2014.11.0307  

  • Download: PDF


Cite this article:
Kumar, A. and Gupta, T. (2015). Development and Laboratory Performance Evaluation of a Variable Configuration PM1/PM2.5 Impaction-Based Sampler. Aerosol Air Qual. Res. 15: 768-775. https://doi.org/10.4209/aaqr.2014.11.0307


HIGHLIGHTS

  • Development of multiple round nozzle-based medium flow PM1/PM2.5 inertial impactors.
  • Both have sharp collection efficiency curves with negligible jet-to-jet interactions.
  • Effective setup to selectively monitor PM1/PM2.5 on a routine basis.

 

ABSTRACT


This study presents the design and lab evaluation of a compact medium flow multiple round nozzle-based inertial impactor with variable head for collecting particulate matter (PM). The impactor operates at a flow rate of 175 LPM and consists of two different sets of circular acceleration nozzles designed for PM2.5 (particle aerodynamic diameter < 2.5 µm) and PM1 (particle aerodynamic diameter < 1 µm), either of them could be used at a time as per the objective of sampling. High vacuum grade silicone grease is used as an impaction substrate. Lab experiments were performed using a poly-disperse dolomite powder as test aerosol. The nozzle configurations selected were such that the first one provides a 50% cutpoint at 2.50 µm (aerodynamic diameter) with a pressure drop of 0.35 kPa while the second one produces a 50% cutpoint at 1.06 µm (aerodynamic diameter) with a pressure drop of 1.07 kPa. Particle losses through the nozzles were low for particle diameter upto 5.0 µm. Particle bounce-off and re-entrainment losses were found to be insignificant. Owing to its higher flow rate, it has an advantage of collecting appreciable quantity of particles (and higher number of samples) in a relatively smaller time frame as compared to other low flow rate samplers. The samples can be analyzed to obtain finely time-resolved aerosol composition which can help in a better understanding of the role of various physico-chemical processes active during different meteorological conditions (extreme dust and foggy events) that affect fate and transport of PM, especially in the Indo-Gangetic plain (IGP).


Keywords: Particulate matter; Stokes number; Impactor; Silicone grease


Share this article with your colleagues 

 

Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

Latest coronavirus research from Aerosol and Air Quality Research

2020 Impact Factor: 3.063

5-Year Impact Factor: 2.857

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal, promotes submissions of high-quality research, and strives to be one of the leading aerosol and air quality open-access journals in the world.