铁—铈水合氧化物吸附剂除磷的间歇试验研究

Batch Study of Phosphate Removal from Aqueous Solution by Ferric-Cerium Hydroxides

采用共沉淀法合成铁—铈水合氧化物脱磷吸附剂 ,进行其对水溶液中磷酸盐吸附的速率曲线、p H值影响曲线、吸附等温线等的测定。结果显示 ,该复合吸附剂在 p H=2～ 6范围内均具有良好的吸附除磷效果 ,其最大静态吸附量是粉末活性氧化铝的 1 .8倍以上。对富磷吸附剂的解吸及再生试验显示 ,该吸附剂可循环使用 ,一次再生后吸附容量约为新鲜吸附剂容量的 90 %。

A ferric-cerium hydroxides adsorbent(FCA) was prepared by neutralizing ferrous/ferric chlorides and cerium sulfate solution mixture.Experiments of absorption kinetic curve,isothermal curve,pH effecting curve were carried out with FCA adsorbing phosphate from aqueous solution.Result shows FCA behaves wide range pH adaptation from 2 to 6;its adsorption capacity is more than 1.8 times of its referential material powder activated alumina(PAA).Phosphate-enriched FCA can be desorption and recuperate.The recuperated FCA possesses 90% of its fresh adsorption capacity.