摘要
采用自牺牲模版法制备氢氧化镁纳米棒,通过XRD、TEM和SEM进行表征。氢氧化镁纳米棒直径约为100nm,长度约为1μm。在此基础上,研究氢氧化镁纳米棒对水溶液中铅离子的吸附特性。研究结果表明,氢氧化镁纳米棒对Pb2+的等温吸附符合Temkin模型吸附等温式,吸附过程是自发的、以化学吸附为主;氢氧化镁纳米棒对Pb2+的吸附动力学符合Lagergren二级动力学和内扩散模型,吸附过程由膜扩散和颗粒内扩散联合控制。
Magnesium hydroxide nanorods were prepared via self-sacrificing template routes and were characterized by XRD、TEM and SEM.TEM and SEM observation showed that most nanorods were about 100nm in diameter and 1μm in length.On that basis,the adsorption behavior lead ion using magnesium hydroxide nanorods was studied.The results showed that the equilibrium data were well fitted to the Temkin isotherm.The adsorption was spontaneous and ascribed to chemical absorption.The kinetics of adsorption followed second-order Lagergren model and intraparticle diffusion model.The adsorption process was controlled by liquid film diffusion and intraparticle diffusion.
出处
《轻金属》
CSCD
北大核心
2013年第1期63-67,共5页
Light Metals
基金
安徽省高等学校省级优秀人才基金资助项目(2011SQRL190)
关键词
氢氧化镁
纳米棒
吸附
铅
热力学
动力学
magnesium hydroxide
nanorods
adsorption
lead
thermodynamics
kinetics
