The disappearance and transfer behavior of polychlorinated biphenyl (PCBs) (the mains of penta PCBs) at higher concentrations (400 mg/kg) bestrewed into semi field soil systems were studied under near field conditions (semi dry climate in North China). The result showed that PCBs did not lose and transfer forward below after 12 months of treatment. And after 24 months of treatment, only less than 2% of PCBs transferred vertically no more than 10cm and PCBs concentration at treatment layers decreased 10.19% including the amount of transfer. It provides the scientific foundation for the landfill or other treatment measurements of PCBs, also gives the basic data for ecological risk assessment of PCBs and other relative compounds.
