氨基化锰铁氧体纳米粒子的制备及吸附Pb^(2+)和Cd^(2+)性能研究  

Synthesis of NH_2-Functionalized Ferromanganese Nanoparticles and Its Adsorption Performance for Pb^(2+) and Cd^(2+)

作　　者：梅向阳 王耀[2] 朱丽云[2] 刘伟[2] 徐晓军[2] 曹广祝 Mei Xiangyang;Wang Yao;Zhu Liyun;Liu Wei;Xu Xiaojun;Cao Guangzhu(The Environmental Assessment Center of Yunnan Province,Kunming 650032;Faculty of Environmental Science and Technology,Kunming University of Science and Technology,Kunming 650500)

机构地区：[1]云南省环境评估中心,昆明650032 [2]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《化学通报》2019年第2期144-150,共7页Chemistry

基　　金：国家自然科学基金项目(41562012)资助

摘　　要：利用一步水热法合成了氨基化锰铁氧体纳米粒子(AMFNs),并研究了其对Pb^(2+)和Cd^(2+)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,25℃时,AMFNs吸附Pb^(2+)和Cd^(2+)在60min内即可达到平衡,最大饱和吸附量分别为255. 57和129. 72 mg/g;吸附过程符合准二级动力学方程和Langmuir等温吸附方程,对Pb^(2+)和Cd^(2+)的吸附过程主要是单分子层化学吸附。AMFNs吸附-再生重复利用5次后,对Pb^(2+)和Cd^(2+)的吸附量仍为初始吸附量的87%以上,显示出良好的再生吸附性能。NH2-functionalized ferromanganese nanoparticles( AMFNs) was synthesized by one-step hydrothermal method,and its adsorption characteristics and adsorption capacities for Pb^2+ and Cd^2+ were also investigated. The AMFNs material characterization was characterized by SEM,FTIR,XPS and XRD etc. The maximum saturated adsorptions on AMFNs achieve 255. 57 mg/g and 129. 72 mg/g for Pb^2+ and Cd2+ at the reaction time 60 min and the temperature 25℃ respectively. The adsorption kinetic and adsorption isotherm are conformed to the pseudo-second-order kinetic and Langmuir isotherm models, respectively. These results showed that the monomolecular chemisorption plays a dominant role in Pb2+ and Cd^2+ adsorption process. In addition,desorption experiments indicated that the removal efficiency of AMFNs to Pb2+ and Cd^2+ can still up to 87% after five repetition tests,which shows a good regenerative adsorption performance.

关 键 词：氨基化 锰铁氧体纳米粒子 吸附动力学 吸附等温线 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O647.3[理学—物理化学]