Diesel Exhaust Particulate Measurement.
Coal Mining Tech Economics & Policy 1990 :553-563
Based on the premise that diesel exhaust aerosol is predominantly submicrometer in size and coal dust is largely greater than 1 um in size, size-selective sampling can be effective as a technique for measuring diesel-aerosol concentrations in underground coal mines. In-mine measurement of mine aerosol size distributions and chemical mass balance analysis confirms the premise for using aerosol size to separate diesel exhaust and mineral dust aerosol during sampling. A personal diesel-aerosol sampler has been developed for measuring the diesel-aerosol concentrations in underground coal mines. This device consists of three sequential stages. The first stage preclassifier limits the sample to respirable aerosol. The second stage separates the resulting respirable aerosol into two parts by aerodynamic diameter using a single-stage impactor with a cut size of 0.8 Um. The third stage collects the < 0.8-Um-diameter aerosol on a medium that is suitable for gravimetric analysis. The sampler is currently being evaluated in both laboratory and field experiments conducted by the U.S. Bureau of Mines, the Mine Safety and Health Administration, and the Generic Minerals Technology Center for respirable dust.
Coal Mining Tech., Economics & Policy 1990; Am. Min. Congr., 1990, PP. 553-563