Cr(Ⅵ)在泉州湾滩涂沉积物上的吸附特性

Sorption Property of Cr(Ⅵ) on the Tidal Flat Sediment of Quanzhou Bay

研究Cr(Ⅵ)在泉州湾滩涂沉积物上吸附行为,以及其吸附机理.探讨pH值和温度对吸附作用的影响,绘制吸附等温线.实验结果表明,常温下Cr(Ⅵ)在泉州湾滩涂沉积物上的吸附平衡时间约需2.5 h;吸附作用随pH值的升高而减弱,随温度的升高而增强;其吸附行为符合Langmuir型吸附等温式.这说明其吸附机理非常复杂.

The present work deals with the sorption behavior of Cr（Ⅵ） on the tidal flat sediment of Quanzhou Bay, and on this basis, inquires into its sorption mechanism. The emphasis is put on the discussion of the effect of pH value and temperature on the sorption, and on the drawing of sorption isotherm, experimental results show that the sorption equilibrium time of Cr（Ⅵ） on the tidal flat sediment of Quanzhou Bay needs about 2.5 hrs at normal atmospheric temperature. The sorption capacity decreases with the increase of pH value but increases with the increase of temperature; and sorption behaviour accords with Langmuir type sorption isotherm equation, implying that its sorption mechanism is very complicated.