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Tools for to Characterize PAH Attenuation • PAH Attenuation as SOM changes with plant C inputs PAH Concentrations - Histograms - Compound ratios Plant Carbon Labile and Refractory OM Humic materials Density Fractions δ 13 C IRMS 14 C Radiocarbon Dating PAH
Modern Plant Carbon and Petroleum Carbon Radiocarbon Signatures 14 CO2 14 C PMC for plants = 100% (modern) • High Abundance of 14C from 14 Plants CO2 in atmosphere N 2 petroleum PMC for petroleum = 0% (dead) • Low Abundance of 14C due 14C decay over time
Page 1 and 2: Tools to Assess Plant C and PAH C C
Page 3 and 4: Rhizosphere mechanisms that alter o
Page 5: Tools for OM Characterization • C
Page 9 and 10: Fractionation Methods to Improve C
Page 11 and 12: Changes to OM Composition Character
Page 13 and 14: [PAH] relative to OM changes Plant
Page 15 and 16: Other Indices for PAH Attenuation
Page 17 and 18: PAH Attenuation Weathering Indices
Page 19 and 20: For Humic Fractionations… • Pla
Page 21 and 22: Density Fractionation of SOM Fracti
Page 23 and 24: OM Changes in Density Fractions Gas
Page 25 and 26: N0 N0 N0 BP BP BP ACL ACL ACL ACE A
Page 27 and 28: PAH Attenuation in Density Fraction
Page 29 and 30: For Density Fractions… • Plant-
Page 31: Future Directions… • Can 14C PM

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