TITLE
SCANNING ELECTRON MICROSCOPY/X-RAY FLUORESCENCE CHARACTERIZATION OF
POST-ABATEMENT DUST


AUTHOR(S)
Yaacov Mamane1, Robert D. Willis2, Robert K. Stevens3, John L.
Miller4


PERFORMING ORGANIZATION NAME AND ADDRESS
1Technion, Haifa, Isreal 32000

2Mantech Environmental Technology Inc., Research Triangle Park, NC
27709

3Atmospheric Research and Exposure Assessment Laboratory, US
Environmental Protection Agency,
Research Triangle Park, NC 27711

4Senior Consultant, US Environmental Protection Agency, Research
Triangle Park, NC 27711


SPONSORING AGENCY NAME AND ADDRESS
Atmospheric Research and Exposure Assessment Laboratory, Office of
Research and Development,
US Environmental Protection Agency,
Research Triangle Park, NC 27711-0047

ABSTRACT
Scanning electron microscopy (SEM) and laboratory X-ray
fluorescence (XRF) were used to characterize post-abatement dust
collected with a HEPA filter.  Three size fractions of resuspended
dust (0-150 æm, 2.5-15 æm, and <2.5 æm) were collected on teflon
filters and analyzed by energy-dispersive XRF.  Automated SEM was
used to determine the size, morphology, and chemistry of individual
particles from 0.2 æm to greater than 250 æm.  Minerals associated
with construction materials, paint fillers, and soil were the
dominant species in all size fractions.  Lead-rich particles were
found in all sizes and could be grouped into three categories:
lead-only (including lead oxide and lead carbonate), mixed
lead/minerals, and automotive lead.  Isolated lead oxide or lead
carbonate particles derived from paint pigments were the dominant
form of the lead-bearing particles in the size fraction <15 æm.