氧化钇对磷酸根的吸附及机理研究

摘要

以氧化钇吸附磷酸盐，考察pH值对静态吸附行为的影响。结果表明，在pH=4时吸附效果最好，吸附量为193.2 mg/g。通过Thomas模型对氧化钇动态吸附磷酸盐拟合的结果表明，其相关系数为0.9296，动态吸附的饱和吸附量可达到150.46 mg/g。吸附动力学实验表明，拟二级模型可以更准确地模拟吸附动力学。结合SEM、FTIR、XRD表征分析，探讨了氧化钇对磷酸盐的吸附机理。%Studying the adsorption of phosphate using yttrium oxide and the effects of pH on the adsorption performance have been investigated. Results show that the adsorption effect is the best at pH=4,and yt-trium oxide has the adsorption capacity of 193. 2 mg/g. The results of the dynamic adsorption process of PO43-by Y2 O3 were fitted by the Thomas model is found the correlation coefficient is 0. 929 6 and the bal-ance adsorption capacity is 150. 46 mg/g. Adsorption kinetics experiments show that the proposed quasi secondary model can more accurately simulate the adsorption kinetics. Combined with SEM,FTIR and XRD characterization analysis,and explore the yttrium oxide adsorption mechanism of phosphate.