Thanks for providing this additional information. I am not sure if I understand your question correctly, but if you are asking on how to select the PX LSM instead of the NOAH LSM in WRF, I believe the answer is to set the sf_surface_physics option to 7 instead of 2 in the WRF namelist input file. However, I am not a WRF user, so you would want to double check the WRF documentation.
We recommend that the current wind-blown dust model implemented in CMAQv5.3+ be run with WRFv4.1 or later using PX LSM. There are several dependencies here - availability of fractional land use (present in PX LSM but not necessarily other LSMs), definition of first layer soil depth (assumed to be 1 cm in the CMAQ dust model and WRF PX LSM, but 10 cm for NOAH), and realistic representation of seasonal and spatial variations of WRF vegetation fraction (ensured in PX LSM for WRFv4.1+, but not ensured for PX LSM in earlier versions of WRF or for other LSMs). For more details, please see the following posts: