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We examined self- purifying coefficient- BOD and COD reduction coefficient in overlying water at the presence and absence of dredging sediment as well as comparison the dredging effectiveness.

分别在已疏浚和未疏浚河道底泥的影响下,考察了上覆水体自净系数———BOD减少速度系数和COD减少速度系数,以比较疏浚对于改善水体自净能力的效果。

The cascade experiments simulated 2D contactor of uranium purification cycle indicate that the pretreating effect of MMH or hydrazine is obvious,and the value of decontamination coefficient(DFRu) increases by 10 times compared with that of the experiments without the application of MMH or hydrazine.

采用确定的条件进行了模拟铀纯化循环2D槽的串级实验,获得了料液经单甲基肼或肼预处理后钌的净化系数(DFRu)。