摘要
以液相沉淀法制备出氨基化磁性Fe_(3)O_(4)复合材料(Fe_(3)O_(4)-SiO_(2)-NH_(2)),通过FT-IR、XRD和SEM对其结构进行表征,并研究了Fe_(3)O_(4)-SiO_(2)-NH_(2)对Cr^(6+)的吸附行为。实验结果表明,Fe_(3)O_(4)-SiO_(2)-NH_(2)对Cr^(6+)的吸附动力学行为更符合准二级动力学。在T=55℃、t=80min、Cr^(6+)溶液的初始浓度为100 mg•L^(-1)、Fe_(3)O_(4)-SiO_(2)-NH_(2)的添加量为0.05g时,该材料对Cr^(6+)的吸附容量为108.7mg•g^(-1),且其吸附过程更适合用Langmuir等温吸附模型描述;5次循环使用后,其对Cr^(6+)的去除率为50.5%。
The aminated magnetic Fe_(3)O_(4)composite materials(Fe_(3)O_(4)-SiO_(2)-NH_(2))were prepared by liquid phase precipitation,FT-IR,XRD and SEM were employed to characterize their structure,and the adsorption behavior of Cr^(6+)by Fe_(3)O_(4)-SiO_(2)-NH_(2)composites were studied.The results showed that the adsorption kinetic behavior of Fe_(3)O_(4)-SiO_(2)-NH_(2)composites for Cr^(6+)is more consistent with the quasi second-order kinetic.Under the conditions of T=55℃,contact time of 80min,an initial Cr^(6+)concentration of 100mg•L^(-1)and an amount of Fe_(3)O_(4)-SiO_(2)-NH_(2)composite of 0.05g,the adsorbent capacity of the composite for Cr^(6+)was found to be 108.7mg•g^(-1)and the adsorption of Cr^(6+)conformed Langmuir isotherm adsorption model.After five cycles,the removal rate of Cr^(6+)was 50.5%.
作者
宋月红
徐辉
张鑫博
代卫丽
SONG Yue-hong;XU Hui;ZHANG Xin-bo;DAI Wei-li(Shangluo University,College of Chemical Engineering and Modern Materials,Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo 726000,Shaanxi,China;Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo 726000,Shaanxi,China;Nanxian Inspection and Testing Center of Yiyang City in Hunan Province,Yiyang 413000,Hunan,China)
出处
《合成材料老化与应用》
2022年第5期55-57,50,共4页
Synthetic Materials Aging and Application
基金
陕西省教育厅项目(19JS026)
陕西省自然科学基础研究计划资助项目(2019JQ-156)
商洛市高性能有色金属制备与加工技术创新团队(SK2019-75)
