College of Environment and Resources��Jilin University��Changchun 130026��China

In order to study the distribution rule of inorganic contaminants in the condition of freeze and condensation in winter��the authors collect winter water sample in Yitong River of Changchun and select F �� ��TFe��Tp and COD to do laboratory simulation experiment in the condition of freeze and condensation based on the water quality analysis of Yitong River in different seasons�� Experimental results indicate that the F �� ��TFe��Tp and COD valus in upper ice are lower than these in river water and ice below water during primary freeze; the F �� and TFe values are also less than the ice below water��while COD value is higher than the ice below water using the secondary freeze ice below water after 3 h; the TFe and Tp ion contents in upper ice change obviously with different pH values and ion initial concentration��which indicate that the water quality of ice layer can be controlled effectively in the condition of freeze and condensation��