采用共沉淀法制备超顺磁性Fe3O4纳米粒子(SPION),并通过硅烷化在SPION粒子表面引入3-氨丙基三乙氧基硅烷(APTES),制得氨基化磁性纳米粒子(Fe3O4-NH2),比较改性前后SPION对于重金属离子Cu2+的吸附,分别考察吸附溶液的pH和Cu2+初始质量浓度(ρ)对吸附效果的影响。结果表明:吸附量均随溶液pH和ρ的升高而增加,在pH为5时达到最大吸附量,ρ为5 g/L时均达到吸附平衡,Fe3O4和Fe3O4-NH2吸附量分别为12.49和103.41 mg/g。
Superparamagnetic iron oxide nanoparticle(SPION) was prepared by co-precipitation.Functionalized magnetic(Fe3O4-NH2) was obtained by silanization of the SPION with(3-aminopropyl)triethoxysilane(APTES).Both Fe3 O4 and Fe3 O4-NH2 nanoparticles were tested for removal of Cu2+ from waste water,and effects of pH and initial concentration(ρ) of Cu2+ solution on adsorption efficiency were investigated.The results showed that the adsorption capacity increased with pH and ρ of the solution and the capacity reached the maximum when pH was 5.Adsorption equilibrium was obtained on a concentration of 5 g/L,which were 12.49 mg/g and 103.41 mg/g for Fe3O4 and Fe3O4-NH2.