| 梅向阳,王耀,朱丽云,刘伟,徐晓军.化学通报,2019,82(2):144-150. |
| 氨基化锰铁氧体纳米粒子的制备及吸附Pb2+和Cd2+性能的研究* |
| Synthesis of NH2-functionalized ferromanganese nanoparticles and its adsorption performance for Pb2+ and Cd2+ * |
| 投稿时间：2018-08-07 修订日期：2018-09-19 |
| DOI： |
| 中文关键词: 氨基化 锰铁氧体纳米粒子 吸附动力学 吸附等温线 |
| 英文关键词:NH2-functionalized ferromanganese nanoparticles adsorption kinetics adsorption isotherm |
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| 中文摘要: |
| 利用一步水热法合成了氨基化锰铁氧体纳米粒子吸附材料,并研究了对Pb2+和Cd2+的吸附特性和去除效果；通过SEM、XRD、 FT-IR和XPS等方法进行了表征分析和吸附机理研究。结果表明：温度为25 ℃,氨基化锰铁氧体纳米粒子吸附Pb2+和Cd2+在60 min内即可达到吸附平衡,最大饱和吸附量分别为255.57 mg?g-1和129.72 mg?g-1；吸附过程符合准二级动力学方程和Langmuir等温吸附方程,对Pb2+和Cd2+的吸附过程主要是单分子层化学吸附。氨基化锰铁氧体纳米粒子吸附-再生重复利用5次后,对Pb2+和Cd2+的吸附量分别仍为初始吸附量的87%以上,表现了良好的再生吸附性能。 |
| 英文摘要: |
| NH2-functionalized ferromanganese nanoparticles (AMFNs) was synthesized by one-step hydrothermal method, and the adsorption characteristics and adsorption capacity of Pb2+ and Cd2+ onto AMFNs were investigated. Several characterization techniques, such as SEM, FTIR and XRD were employed characterize the AMFNs. The impact of various operating parameters, such as pH, initial concentration of metal ions, contact time, as well as adsorption kinetics, isotherms and thermodynamics were systematically investigated. The adsorption of Pb2+ and Cd2+ on AMFNs reached equilibrium in 60 min at 25℃, and the maximum saturated adsorption was 255.57 and 129.72 mg/g. The adsorption kinetic and adsorption isotherm were conforms to the Pseudo-second-order kinetic and Langmuir isotherm models, respectively. These results showed that the monomolecular chemisorption play a dominant role in Pb2+ and Cd2+ adsorption process. In addition, desorption experiments indicated that the removalSefficiency of AMFNs to Pb2+ and Cd2+ could still up to 87% after five repetition tests. |
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