伊通河冬季冰冻浓缩状态下无机污染物分配规律的室内模拟

Laboratory simulation on distribution rule of inorganic contaminates in the condition of freeze and condensation of Yitong River in winter

为研究冬季冰冻浓缩状态下无机污染物分配规律,采集长春市伊通河冬季水样,在分析伊通河不同季节水质基础上,选取F-、TFe、TP、COD四项指标进行冰冻浓缩状态下室内模拟实验。实验结果表明:不同冰冻程度情况下,初次冰冻上层冰中的COD、TP、TFe、F-值均低于河水和冰下层水;用冰冻3 h后的冰下层水进行二次冰冻,上层冰中的F-、TFe值仍低于冰下层水,而COD值高于冰下层水;随着pH值及离子初始浓度的不同,TFe、TP-在冰上层离子含量有明显变化,说明在冰冻浓缩状态下,可以有效控制结冰层水质。

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 seconda- ry 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.