Correlation Study Between Soil-Borne Polycyclic Aromatic Hydrocarbons And Soil Organic Matter: Soil Grain Size And Sampling Season Effect
Effects of soil grain size and sampling season on correlations between soil-borne polycyclic aromatic hydrocarbons and soil organic matter were examined. The factors influenced the correlation; the results highlight the importance of soil grain size and sampling season for correlation study. This study used 30 samples collected during summer and winter in the arid region of El Paso, TX, and the samples were size-segregated into coarse-textured (125μm-500μm) and fine-textured (<125μm). This study compared the correlation among four groups: winter coarse, winter fine, summer coarse, and summer fine. The most significant correlation was found in the winter coarse fraction set, while the least significance was found in the summer fine fraction. Soil grain size also affected isomeric ratios: the result indicated the complexity of source apportionment by studying soil-borne PAHs.