| PCBs in environment are deposited in soil finally. Adsorption process of PCBs in the soil has received considerable attention as one of the most important processes affecting the mobility, degradation and biological activity of PCBs in the environment. So the study on adsorption behavior of PCBs in soil has a significant effect to known their pollute status, evaluate environmental quality, predict the transport and transformation law, control environmental pollution and protect environment.In this paper, many research results of PCBs in soil, including property of PCBs, their pollute status and organic pollutants' adsorption behavior in soil were summarized in detail. Based on the adsorption principle of organic pollutants in soil, the adsorption equilibrium experiments of PCBs were carried out by taking 3 kinds of soil/sediment with different property in the laboratory condition, and the adsorption mechanism of these hydrophobic organic compounds by soil/sediment from aqueous solution was explored primarily.The results revealed that the process of PCBs adsorption in soil/sediment mainly occurred within several hours, the Freundlich model was found to be adequate for describing the adsorption behavior of PCBs in these samples, the partition of PCBs in organic carbon of soil/sediment play an important role in its sorption process. The calculation result of the average Koc of different PCB congers indicated that all of the Koc exceed 5000, so PCBs should be ranged in difficult-transferred organic compounds. Sorption coefficient (Kf) of PCBs relates directly to the organic carbon content of soil/sediment, and the property of PCBs is also a critical factor, as the number of atom Cl in PCBs increase, the sorption coefficient (Kf) fills out. there is a preferable linearity correlation between logKf and logKow of PCBs. In addition. logKoc of PCBs relates to logKow, so the organic pollutants' logKoc can be budgeted through logKow to forecast their transference in soils.
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