改性硅藻土对磷的吸附特性研究

改性硅藻土对磷的吸附特性研究(7000字)
摘  要：本实验研究了以实验用硅藻土为原料经活化的改性硅藻土对磷的吸附解吸行为，并探寻改性硅藻土对磷的最佳吸附条件及对磷的吸附类型。为研究改性硅藻土的吸附性能，特别引入了吸附等温实验，结果表明其等温吸附拟合能较好的被Freundlich方程描述。另外，对改性硅藻土在不同PH环境下的吸附性能也做了研究。实验结果表明，当pH值由3上升到12，改性硅藻土对磷的吸附能力大幅下降超过29%。
关键词：改性硅藻土；化学除磷；吸附剂

RESERACH ON THE ADSORPTION CHARACTERISTIC TO PHOSPHORUS WITH MODIFIED DIATOMIT
Abstract: adsorption and desorption behavior of Modified Diatomit, which use experimental Diatomit with activation as raw materials, to Phosphorus was studied in the experiment, and exploring the best condition for adsorption behavior of Modified Diatomit to Phosphorus and adsorption type of Modified Diatomit to Phosphorus. In order to study the adsorption capacity of Modified Diatomit, the adsorption isotherm experiment was introduced particularly, and results of the experiment indicated that Freundlich equation fits best for the characteristics of adsorption isotherms of Modified Diatomit. Moreover, the adsorption capacity of Modified Diatomit to Phosphorus under different pH was studied. The results of the experiment showed that when pH value go up from 3 to 12, the adsorption capacity of Modified Diatomit to Phosphorus sharply reduces more than 29%.

Key Words: Modified Diatomit; sorbent; chemical dephosphorization