Ϊ�о���������Ũ��״̬���޻���Ⱦ�������ɣ��ɼ���������ͨ�Ӷ���ˮ�����ڷ�����ͨ�Ӳ�ͬ����ˮ�ʻ����ϣ�ѡȡF ����TFe��TP��COD ����ָ����б���Ũ��״̬������ģ��ʵ�顣ʵ��������: ��ͬ�����̶�����£����α����ϲ���е�COD��TP��TFe��F �� ֵ�����ں�ˮ�ͱ��²�ˮ; �ñ���3 h ��ı��²�ˮ���ж��α������ϲ���е�F ����TFe ֵ�Ե��ڱ��²�ˮ����COD ֵ���ڱ��²�ˮ; ����pH ֵ�����ӳ�ʼŨ�ȵIJ�ͬ��TFe��TP �� �ڱ��ϲ����Ӻ��������Ա仯��˵���ڱ���Ũ��״̬�£�������Ч���ƽ����ˮ�ʡ�

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��