The pollution produced in the process of oil exploitation, refining, transporting and waste oily water draining has become an important resource to soilcontamination.
石油的开采、冶炼和运输过程的污染和泄漏及含油废水的排放等已成为土壤污染的重要来源。
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Heavy metal contamination is extremely harmful in soilcontamination. It is one of the research priorities in the world to control and remedy heavy metal contamination.