Abstract
Selected within Oilfield wells abandoned mine sites, to collect soil samples at different depths to test the heavy metal content, explore the vertical distribution of heavy metal content, combined with the soil texture and the surrounding environment of the samples, the study area to explore sources of heavy metals. Studies have shown that the four heavy metals content are quite different, the lead(Pb) content is inbetween 0.7-33 mg / kg, the nickel(Ni) content is inbetween13-55mg / kg, barium(Ba) content is inbetween 110-725mg / kg, the cobalt(Co) content is 15-60mg / kg. These four heavy metals are mainly comes from exogenous human activities, including oil exploration, atmospheric deposition, vehicle emissions, manure and fertilizer.
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