| 磁性氧化石墨烯的制备及其对Co(Ⅱ)的吸附 |
| |
| 引用本文： | 邓佳,赵耀林,童大银,杨琳.磁性氧化石墨烯的制备及其对Co(Ⅱ)的吸附[J].核化学与放射化学,1980,41(3):283-289. |
| |
| 作者姓名： | 邓佳 赵耀林 童大银 杨琳 |
| |
| 作者单位： | 西安交通大学 核科学与技术学院，陕西 西安710049 |
| |
| 摘 要： | 采用Hummers方法和化学共沉淀方法，合成了磁性氧化石墨烯（M/GO）材料，并以此作为吸附剂材料，采用静态批式实验方法研究了其对Co(Ⅱ)的吸附去除机理。结果显示M/GO具有良好的饱和磁场强度，易于利用外加磁场实现吸附后的固-液分离。Co(Ⅱ)在M/GO表面的吸附几乎不受背景离子强度的影响，而受pH的影响显著。其吸附可快速达到平衡，吸附动力学符合准二级速率方程。升高温度可有效促进吸附。吸附等温过程符合Langmuir模型。热力学参数的分析表明Co(Ⅱ)在M/GO表面的吸附为自发吸热过程。
|
| 关 键 词： | 氧化石墨烯 Fe3O4 Co(Ⅱ) 吸附 |
Synthesis of Magnetic Graphene Oxide for Removal of Co(Ⅱ) From Aqueous Solution |
| |
| DENG Jia,ZHAO Yao-lin,TONG Da-yin,YANG Lin.Synthesis of Magnetic Graphene Oxide for Removal of Co(Ⅱ) From Aqueous Solution[J].Journal of Nuclear and Radiochemistry,1980,41(3):283-289. |
| |
| Authors: | DENG Jia ZHAO Yao-lin TONG Da-yin YANG Lin |
| |
| Affiliation: | School of Nuclear Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China |
| |
| Abstract: | In Hummers’ method and chemical co-precipitation method, an adsorbent of magnetic graphene oxide (M/GO) is synthesized, and used to remove Co(Ⅱ) from aqueous solution. With Hummers’ method and chemical co-precipitation method, M/GO has great saturation magnetization, and can be easily separated by an applied magnetic field. The investigation by batch sorption experiments indicates the sorption of Co(Ⅱ) on M/GO is pH-dependent and ionic strength-independent. The sorption equilibrium can be achieved within half an hour, and the kinetic sorption is fitted well by a pseudo-second-order rate equation. The high temperature is favorable to the sorption of Co(Ⅱ) on M/GO, and the sorption isotherm is described well by Langmuir model. The thermodynamic parameters indicate that the sorption is a spontaneous and endothermic process. |
| |
| Keywords: | graphene oxide Fe3O4 Co(Ⅱ) sorption |
|
| 点击此处可从《核化学与放射化学》浏览原始摘要信息 |
|
点击此处可从《核化学与放射化学》下载全文 |
|
