The effect of precipitations vary with particle size, so hopefully you can come up with some good findings.

you might find helpful this study:

Munir et al. 2017. Analysing PM2.5 and its Association with PM10 and Meteorology in the Arid Climate of Makkah, Saudi Arabia. Aersols and air quality research.......

Thank you Said. But I am specifically looking for work on coarse mode scavenging. The paper was pretty nice.

HI Arindam,

There may be some useful information in the below paper for you as well as some of the references.  You will probably be limited to (i) some papers on the effect of precipitation on surface ambient concentrations of coarse PM and (ii) the calculation of scavenging coefficients for low solubility crustal elements that you can infer were preliminarily coarse PM in precipitation samples (like the below paper). 

https://www.researchgate.net/publication/235396127_Investigation_of_mercury_wet_deposition_physicochemistry_in_the_Ohio_River_Valley_through_automated_sequential_sampling

Matt

Article Investigation of mercury wet deposition physicochemistry in ...

Matthew, Thank you for your reply..

Actually I am looking for experimental research article based on coarse particle concentration before rain and after rain.

This paper is very nice to read one. We also try sequential sampling on our station over Himalaya. But we look into the major water soluble ions only.