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The distribution pattern and sources of trace elemental contents of refined petroleum products were determined in this study. Petroleum products comprising of petrol, kerosene, and diesel samples were obtained from different commercial gas stations in Nigeria and analyzed for V, Cr, Mn, Fe, Co, Ni, Cu, and Zn using Atomic Absorption Spectrophotometry. Results showed that Zn had the highest mean concentration of 16.16 ± 2.69 mg/L in petrol while Cu had the lowest mean concentration of 0.70 ± 0.42 mg/L in kerosene. Generally, the contents of the trace elements increased from light to heavy oil. In consonance with the results of correlation matrix, principal component analysis indicated that Cr, Ni, V, and Fe were incorporated as biophile elements during sedimentation while Cu, Mn, Zn, and Co were introduced into refined petroleum products via atmospheric deposition of metal-containing particulates and/or during refining, storage and transportation.

Distribution pattern and source apportionment of trace elements in refined petroleum products