氨基改性磁性纳米MnFe_(2)O_(4)对水中苯酚的吸附性能研究

Adsorption of Phenol by Amino-modified MnFe_(2)O_(4) Magnetic Nanoparticles

对磁性纳米MnFe_(2)O_(4)进行氨基改性,并采用采用X射线衍射(XRD)、N_(2)吸附-脱附、振动样品磁强计(VSM)和透射电镜(TEM)对其理化性质进行了表征。研究了其对水中苯酚的吸附性能,结果表明,氨基改性的MnFe_(2)O_(4)-NH_( 2)比未改性的MnFe_(2)O_(4)的吸附性能高,苯酚的去除率可以达到91.2%,且其重复使用4次后,MnFe_(2)O_(4)-NH_( 2)再生对水中苯酚的去除率仍可以达到87.5%,相比于首次使用,其去除效率只有轻微的降低。

Magnetic MnFe_(2)O_(4) nanoparticles were modified by amino.The physical and chemical properties of the obtained amino-modified MnFe_(2)O_(4) were characterized by X-ray diffraction(XRD),N_( 2) adsorption-desorption,vibrating sample magnetometer(VSM)and transmission electron microscopy(TEM).The adsorption results showed that MnFe_(2)O_(4)-NH_( 2 )exhibited higher adsorption activityadsorption of phenol than that of MnFe_(2)O_(4).Moreover,the regeneration of adsorbent,after four cycles,the removal efficiency of MnFe_(2)O_(4)-NH_( 2) was above 87.5%for phenol,with slight reduction.