以菌糠为原料，采用共沉淀法制备Fe₃O₄@P-AC复合材料。考察了溶液pH、初始质量浓度、吸附剂质量浓度和离子强度4个因素对吸附头孢他啶效果的影响，并进行等温吸附模型和吸附动力学拟合。结果表明，头孢他啶的吸附符合准二级动力学模型，吸附过程以化学吸附为主。与Langmuir方程相比，头孢他啶的吸附过程更适合用Freundlich方程进行描述，吸附过程以多分子层吸附为主。当溶液pH为6、初始质量浓度为50 mg/L、Fe₃O₄@P-AC质量浓度为2 g/L时吸附效果最佳。同时，通过SEM、FT-IR等对Fe₃O₄@P-AC进行表征，结果显示Fe₃O₄@P-AC表面疏松多孔且官能团丰富，说明有利于对头孢他啶的吸附。

Fe₃O₄@P-AC composite material is prepared by the chemical precipitation method using spent mushroom substrate as raw material.The influence factors on the adsorption effect of the material to ceftazidime are investigated, including solution pH value, initial mass concentration, adsorbent dosage and ionic strength.The adsorption kinetics and isotherms are fitted.It is shown that the adsorption of the material to ceftazidime accords with the pseudo second order kinetic model, and the adsorption process is dominated by chemical adsorption.Compared with Langmuir equation, the adsorption process for ceftazidime is more suitable to be described by Freundlich equation, in which the adsorption process is dominated by multi-layer adsorption.The adsorption effect reaches the best when pH value of the solution is 6, the initial concentration of ceftazidime is 50 mg·L^-1, and the mass concentration of Fe₃O₄@P-AC is 2 g·L^-1.It is shown through characterization by means of SEM, FT-IR, etc.that Fe₃O₄@P-AC's surface is loose, porous and rich in functional groups, favorable for the adsorption to ceftazidime.