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-functionalizedferromanganese nanoparticlesadsorption kineticsadsorption isotherm 基金项目:

作者	单位	E-mail
梅向阳	云南省环境评估中心	2991214283@qq.com
王耀	中陕核工业集团二二四大队有限公司
朱丽云	昆明理工大学外国语学院
刘伟	昆明理工大学环境科学与工程学院
徐晓军	昆明理工大学环境科学与工程学院	xuxiaojun88@sina.com

摘要点击次数:1186 全文下载次数:1 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. 查看全文查看/发表评论下载PDF阅读器 相关附件：版权转让声明书附件1 -->