蛋壳粉对富营养化水中磷吸附特性的研究

Study on the Adsorption Characteristics of Eggshell Powder to Phosphorus in the Eutrophic Water

[目的]研究废弃蛋壳粉对富营养化水中磷的吸附性能。[方法]在不同添加量、不同振荡时间、不同温度、不同的磷溶液初始浓度和不同溶液p H的条件下,探讨蛋壳粉对富营养化水中磷的吸附效果,考察其吸附磷的动力学行为。[结果]在含有30μg/ml的富营养化水磷溶液中,蛋壳粉的最佳添加量为10μg/ml;蛋壳粉对磷的单位吸附量随着温度的升高、磷溶液初始浓度的增加而增加;蛋壳粉在p H为5时对磷的吸附效果最佳;振荡4 h后蛋壳粉对磷的吸附量达到平衡状态;蛋壳粉对磷吸附动力学吸附过程遵循准二级动力学模型,相关系数达到0.994 3。[结论]蛋壳粉具有吸附富营养化水中磷的能力,可用于富营养化水污然治理。

[ Objective ] The research aimed to study the adsorption characteristics of abandoned egg shell powder to phosphorus in eutrophication water. [ Method ] Under different conditions such as the amount of eggshell powder, oscillating time, temperature, initial concentration of phosphor- us solution and pH of solution, the adsorption effects of eggshell powder to phosphorus in the eutrophic water was studied, and the adsorption kinet- ic behavior was also studied. [ Result] In the eutrophic water containing 30 μg/ml phosphorus,the optimum addition amount of eggshell powder was 1O μg/ml. The unit adsorption capacity of eggshell powder to phosphorus was increased with the increase of the initial concentration of phos- phorus and temperature. The adsorption effect of eggshell powder to phosphorus was the best at pH of 5. After oscillating 4 hours, the adsorption capacity of eggshell powder to phosphorus achieved equilibrium status. The adsorption kinetics of eggshell powder to phosphorus could be de- scribed by quasi two-level dynamic model with the correlation coefficient of 0.994 3. [ Conclusion] The eggshell powder had the ability of adsor- bing phosphorus, so it could be used for controlling the pollution of eutrophic water.