用正硅酸四乙酯(TEOS)修饰Fe_3O_4表面,并将其与经4-氯苯基异氰酸酯改性的纤维素通过六亚甲基双异氰酸酯(HDI)连接,制得功能化Fe_3O4_@SiO_2-纤维素磁性微球(磁性微球C),并采用扫描电镜(SEM)、傅里叶红外光谱仪(FTIR)等对其进行表征,考察了所得磁性微球C对铜离子(Cu~(2+))的吸附性能。结果表明:所得磁性微球C平均粒径为573 nm左右,分散性好,对Cu~(2+)吸附在30 min内达到平衡,在吸附剂质量为0.1 g,Cu~(2+)浓度为0.02 mol/L,p H=4时,吸附量可达到44.23 mg/g,吸附等温数据符合Langmuir模型。 The surface of Fe_3O_4 was modified by tetraethyl orthosilicate (TEOS) and linked with 4-chlorophenylisocyanate-modified cellulose through hexamethylene diisocyanate (HDI) to obtain functionalized Fe_3O4_ @ SiO_2- The magnetic microspheres (magnetic microspheres C) were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The effects of magnetic microspheres C on Cu ~ (2+ )) Adsorption performance. The results showed that the average particle size of the obtained magnetic microspheres C was about 573 nm, the dispersion was good, and the adsorption of Cu 2+ was balanced within 30 min. When the mass of the adsorbent was 0.1 g and the concentration of Cu 2+ Was 0.02 mol / L, the adsorption capacity reached 44.23 mg / g when p H = 4, and the adsorption isotherm data conformed to the Langmuir model.