Second generation chemical mass balance source apportionent of sulfur oxides and sulfate at the grand canyon during the project mohave 1992 summer intensive

摘要

Receptor based chemical mass balance analysis techniques are designed to apportion species which are conserved during pollutant transport using conserved source profiles. The techniques will fail if non-conservative species (or profiles) are not properly accounted for in the CMB model. The straightforward application of the CMB model developed BYU using regional profiles to the Project MOHAVE data resulted in a significant under-prediction of total sulfat oxides (SO_x, SO_2 plus fine particulate sulfate) for many samples at Meadview, AZ. In addition, for these samples the concentration of the inert tracer emitted from the Mohave Power Project, ocPDCH, was also under-predicted. A second generation model has been developed which assumes that separation of particles and SO_2 can occur in the MPP plume during night-time stable plume conditions.