不同改性方法制备的菹草秸秆生物炭对水溶液中 Cd(II)的吸附
Adsorption of Cd(II) from aqueous solution by Pennisetum sp. straw biochars derived from different modification methods.
机构信息
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
CEPREI Environmental Assessment and Monitoring Center, The 5th Electronics Research Institute of the Ministry of Industry and Information Technology, Guangzhou, 510620, China.
出版信息
Environ Sci Pollut Res Int. 2019 Mar;26(7):7024-7032. doi: 10.1007/s11356-019-04158-6. Epub 2019 Jan 15.
The adsorption mechanism of Cd (II) was investigated by Pennisetum sp. straw biochars (JBC) that were modified by two different methods: KMnO impregnation (JMB1) and HO impregnation (JMB2). A scanning electron microscope and energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), a Fourier transform infrared spectrometer (FTIR), and a Brunauer-Emmett-Teller (BET) specific surface area analysis were employed to examine the physicochemical characteristics of biochars. The Cd(II) adsorption kinetic fit, the Langmuir model well, and the maximum adsorption capacity occurred in the following order: JMB1 (90.32 mg/g) > JMB2 (45.18 mg/g) > JBC (41.79 mg/g), suggesting that JMB1 had an excellent adsorption performance. Finally, X-ray photoelectron spectroscopy (XPS) was used to explore the main adsorption mechanism. Our results showed that JMB1 was an excellent adsorbent in removing Cd(II) from aqueous solution.
采用两种不同方法（KMnO4 浸渍（JMB1）和 HO 浸渍（JMB2））对改性的狼尾草秸秆生物炭（JBC）进行研究，以探讨 Cd（II）的吸附机理。利用扫描电子显微镜和能谱仪（SEM-EDS）、X 射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和 Brunauer-Emmett-Teller（BET）比表面积分析对生物炭的物理化学特性进行了研究。Cd（II）吸附动力学拟合表明，Langmuir 模型拟合较好，最大吸附容量的顺序为：JMB1（90.32 mg/g）>JMB2（45.18 mg/g）>JBC（41.79 mg/g），表明 JMB1 具有优异的吸附性能。最后，利用 X 射线光电子能谱（XPS）探讨了主要的吸附机理。结果表明，JMB1 是一种从水溶液中去除 Cd（II）的优良吸附剂。
Zotero 插件