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STRUCTURE OF PRIMARY PM2.5 DERIVED FROM DIESEL TRUCK EXHAUST
Citation:
Huffman, G. P., F. E. Huggins, N. Shah, S. Pattanaik, H. C. Meuzelaar, S. J. Jeon, D. Smith*, D B. Harris*, AND et al. STRUCTURE OF PRIMARY PM2.5 DERIVED FROM DIESEL TRUCK EXHAUST. SOIL AND SEDIMENT CONTAMINATION: AN INTERNATIONAL JOURNAL 45(3):441-445, (2000).
Description:
The U.S. Environmental Protection Agency is currently considering regulations on airborne particulate matter < 2.5 microns in mean diameter (PM2.5). It is important that the molecular structure and microstructure of PM2.5 from various sources be thoroughly characterized in order to identify structural features that may be important for source apportionment and health effects. Two of the primary sources of PM2.5 from petroleum are combustion of residual fuel oil and diesel engines. In previous papers, we have discussed the structure, of PM2.5 derived from the combustion of residual fuel oil. In the current paper, we report some preliminary results on the molecular structure of primary PM2.5 from diesel vehicle tests. The techniques employed included thermal desorption (TD) GC/MS, x-ray absorption fine structure (XAFS) spectroscopy, and SQUID magnetometry.