沸石除磷复合吸附剂的制备及其性能研究

针对市政污水二级出水中磷含量较高的问题，结合国内外相关研究，采用廉价的天然沸石为基体材料，选择镧离子为无机载入离子，氯化镧为无机载入剂对沸石进行复合处理，处理后的沸石除磷能力提高了83.83个百分点，最佳复合条件为pH=10，LaCl₃浓度0.4%，复合时间1 h，复焙烧失温度200 ℃，复焙烧失时间1 h。复合材料吸附磷的等温线较好地符合Langmuir等温线模型。与幂函数相比，叶洛维奇吸附动力学方程能更好地阐明复合吸附材料在除磷过程中的吸附机理。通过对材料进行扫描电镜对比测试分析，可知在制备复合吸附材料的过程中，沸石表面形貌、微观孔径大小和形状均发生了变化。

Preparation of Compounded Adsorption of Phosphorus Removal with Zeolite and its Performance

In view of the problems that the high concentration of phosphate remained in secondary effluent, and combining with the related research at home and abroad, adsorption processes were attempted to remove phosphate, which used the  inexpensive natural zeolite as basic materials, the lanthanum ion as inorganic loading ion, loading dose of lanthanum chloride as the inorganic loading dose to compoundly treat Zeolite.After treatment, the removal capacity of phosphate by zeolite reached 83.83 %.The appropriate composite conditions were pH=10, 0.4% of LaCl3 concentration, compound time of 1 h, 200 ℃ of calcined temperature for 1 h.Compared with the power function, Elovich absorption kinetic equation could more clearly describe the absorption mechanism in phosphorus removal process by the composite  adsorbent.Through the contrast analysis by scanning electron microscope, it is shown that in the preparation of composite adsorbent process, the surface morphology and micro-pore size of zeolite and its shape have been changed.