Study of the Controlling Factors of the Trace Elements in the Soil of East Baghdad Oil Field

Abstract

Study of controlling factors that governing the distribution of trace elements in the soil of east Baghdad oil field was conducted through collecting and analyzing 6 surface soil samples from six sites (EB19, EB83, EB86, EB95, EB96, EB104). Soil samples were analyzed for trace elements, the mean values of (Cd, Co, Cr, Cu, Mn, Ni, Pb, Sr, V, Zn) were over the standard limits except Fe which was within standard limits. The Controlling factors are (Organic matters, Fe-Mn, pH, and clay minerals). The average of organic matter for highest three soil samples in their content of trace elements was (1.41) and the lowest three samples was (1.81), while the average of Fe- Mn in the highest samples was (51671, 1025 ppm) and the lowest samples was (17879, 402 ppm) respectively. The average of pH for high and low samples in the concentrations of trace elements (8.1, 8.2), respectively. Whereas the average of clay minerals in the highest samples was (9.16 %) and the lowest samples was (11.6 %) . The results revealed that the factors mentioned above didn’t influence the trace element concentration in the soil samples, indicating that anthropogenic activities role were responsible for the increase of the concentration of trace elements, in addition to the parent rocks.