活化煤系高岭土吸附生活污水中磷的研究(Ⅰ) - (Ⅰ)

考察了Na_2CO_3活化煤系高岭土对城市生活污水中磷的吸附。结果表明:当焙烧温度在700～750℃时吸附率达到最大,且在相同条件下,先活化后焙烧比先焙烧后活化的煤系高岭土对污水中磷的吸附率明显要低。当Na_2CO_3的浓度为2 mol/L、固液比为10g/L时,吸附率都各自能达到其相同条件下的最大值。液膜扩散是煤系高岭土对磷吸附的主控步骤。 Phosphorus in municipal wastewater adsorpted by coal-measures kaoline which was activated by Na_2CO_3 had been studied.When the roast temperature is 700℃ to 750℃,adsorption rate could be got to maximum.Under the same conditions,the adsorption rate of coal-measures kaoline that have been roasted after activated is lower than coal-measures kaoline that has been activated after roasted.Adsorption rate could be got to maximum,when concentration of sodium carbonate is 2 mol/L,solid-to-liquid ratio is 10 g/L,the adsorption rate could be got to the peak respectively,and liquid film diffusion is central step