The elemental carbon content in DPM of vehicles in an underground metal mine with and without diesel particulate filters.
Bugarski-A; Mischler-S; Noll-J; Patts-L; Schnakenberg-G
Proceedings of the AAAR 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia. Mount Laurel, NJ: American Association for Aerosol Research, 2004 Oct; :194
Since elemental carbon (EC) is a major part of diesel particulate matter (DPM) and EC is selective to DPM in the metal/nonmetal mines when an impactor is used, EC is used as a surrogate for DPM concentrations in underground metal/nonmetal mines. One of the problems with using EC as a surrogate is the question of how representative EC is to total DPM. The ratio between EC and total DPM changes depending upon engine duty cycle and fuel. Another concern is whether the ratio of EC to total DPM (TDPM) will change when certain control technologies are used. In this study the EC/TDPM of three vehicles used frequently in a metal mine under conditions normally seen in production were examined. The EC/TDPM was consistently between 70-80 % with a haul truck and two loaders under conditions used in this metal mine, and the TDPM was almost 100 % total carbon (TC). The characteristics of DPM changed when control technologies were used. Catalyzed dpfs produced non-carbon DPM (probably sulfates). The EC/TC ratios went from being consistently between 70-90 % to be consistently between 40-60 %.
Underground-mining; Metal-mining; Metals; Particulates; Particulate-dust; Diesel-emissions; Diesel-exhausts; Mining-industry
Proceedings of the AAAR 23rd Annual Conference, October 4-8, 2004, Atlanta, Georgia