Particulate Matter and its Sources in Georgia Sangil Lee.

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Presentation transcript:

Particulate Matter and its Sources in Georgia Sangil Lee

Particulate Matters PM10 (<10  m) regulated due to its health concerns. PM2.5 (<2.5  m) believed to cause the severe health problems (premature mortality, respiratory, cardiovascular disease). Recently, EPA established annual (15  g/m 3 )and 24 hours (<65  g/m 3 ) NAAQS for PM2.5.

chemical Speciation Trends Network (STN) Characterizing annual, seasonal, and spatial trends of PM2.5. Monitoring air quality and the progress of control programs. Developing emission control strategies. Comparing the chemical speciation data to those from other network studies.

National PM2.5(Annual Mean) Trends 2001~ Georgia, 2001

PM2.5(primary) and Precursor Emissions 1999 PM2.5 SO2 NH3NOxVOCs from

Variation of PM2.5 in Georgia 2002~2003

Correlation of Major Species

Chemical Composition of PM2.5 Rome, FloydDecatur, DekalbAthens, Clarke Columbus, Muscogee Macon, BibbAugusta, Richmond Douglas, CoffeeSavannah, Chatham

Source Apportionment with Chemical Mass Balance Quantify the source contribution to the receptor. C ik =  f ij S jk i = 1,…n (chemical species) j = 1,…,m (sources), k = 1,…,l (samples). C ij : observed conc. of species i in sample k. f ij : fraction of species i in source j. S jk : conc. of from species i in source k. Assumption: 1) compositions of source emissions are constant, 2) chemical species do not react with each other, 3) All sources contributing significantly to the receptor have been included in the calculation, 4) the number of sources is less than or equal to the number of species, 5) the source profiles are sufficiently different from one another, 6) measurement uncertainties are random, uncorrelated, and normally distributed. j = 1 m

Source Profiles for CMB

Summary Metro-areas have higher PM2.5 mass than NAAQS level( >15  g/m 3 ). The higher correlation, the closer location. Sulfate and Organic Carbon in chemical composition. Secondary and Wood Burning in sources.