La@Zr功能化颗粒生物炭对磷的动态吸附研究

Dynamic Adsorption Property of Phosphate in Aqueous Solution Using La@Zr Modified Granular Boichar

研究以颗粒生物炭(GBC)为原料,制备La@Zr改性颗粒生物炭(La@Zr-GBC),并研究了其动态除磷性能。结果表明,Thomas模型能较好拟合吸附数据,一定程度增加初始磷浓度有助于提高磷吸附量,低流量和酸性环境有利于的磷的吸附,共存离子Cl-和SO_(2)-4对磷吸附影响较小,但HCO-3抑制磷的吸附。采用1.0 mol/L NaOH为洗脱剂,经5次循环吸附和洗脱后,La@Zr-GBC对磷的吸附量下降了15.2%。

The La@Zr functionalized granular boichar(La@Zr-GBC)was prepared and used for the removal of phosphate from aqueous solution in column system.Thomas model was fitted with breakthrough curves in a continuous column process.The low flow rate and acidic environment were favorable for phosphorus adsorption.The existence of Cl-and SO_(2)-4 had little influence on phosphate adsorption capacity,while HCO-3 could restrain phosphate adsorption.The adsorption capacity of the La@Zr-GBC showed a loss of 15.2%after five cycles of adsorption-desorption by using 1.0 mol/L NaOH solution.