摘要
稀土资源的开采伴随着稀土离子排放,对水资源造成了严重污染。吸附法是处理水相稀土离子污染的一种高效技术,磁性吸附剂能够加速固液分离,具有较大的研究价值。本研究以FeCl_(3)·6H_(2)O、甘醇、醋酸钠、聚乙二醇(PEG2000)等为原料,采用溶剂热法在200℃的条件下制备粒径约为230 nm的Fe_(3)O_(4)磁性纳米颗粒,将其加入正硅酸乙酯中,利用氨水水解聚合,即可形成粒径约为300 nm的Fe_(3)O_(4)@SiO_(2)磁性吸附剂材料。此复合材料为核壳结构,包含Fe_(3)O_(4)和SiO_(2)两种晶型结构。SiO_(2)的包覆未对Fe_(3)O_(4)物相结构产生较大影响,在包覆的同时能够显现出一定的磁性性能。此复合材料对Er(Ⅲ)和Ho(Ⅲ)的最大吸附容量分别达到10.03 mg/g和5.25 mg/g。
The mining of rare earth resources is accompanied by the emission of rare earth ions,which causes serious pollution to water resources.The adsorption method is an efficient technology to deal with aqueous rare earth ion pollution,and the magnetic adsorbent can quickly realize the solid-liquid separation,which is with high research value.In this study,FeCl_(3)·6H_(2)O,glycol,sodium acetate and polyethylene glycol(PEG2000)were used as raw materials,and Fe_(3)O_(4)magnetic nanoparticles with a particle size of about 230 nm were prepared by solvothermal method at 200℃,and a Fe_(3)O_(4)@SiO_(2)magnetic adsorbent material with a particle size of about 300 nm was formed by adding Fe_(3)O_(4)magnetic nanoparticles to ethyl orthosilicate and hydrolyzed and polymerized by ammonia hydrolysis.The prepared composite material is a core-shell structure,including Fe_(3)O_(4)and SiO_(2)crystal structures.The coating of SiO_(2)did not have a great effect on the phase structure of Fe_(3)O_(4),and Fe_(3)O_(4)could show certain magnetic properties even when coated.The maximum adsorption capacity of this composite for Er(Ⅲ)and Ho(Ⅲ)was as high as 10.03 mg/g and 5.25 mg/g,respectively.
作者
周键
昝苗苗
肖燕飞
刘嘉铭
ZHOU Jian;ZAN Miaomiao;XIAO Yanfei;LIU Jiaming(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China;Ganzhou Engineering Technology Research Center of Green Metallurgy and Process Intensification,Ganzhou 341000,China)
出处
《江西冶金》
2024年第1期53-57,共5页
Jiangxi Metallurgy
基金
国家自然科学基金项目(52274351)
江西省“双千计划”科技创新高端人才(青年)项目(jxsq2019201116)
江西省青年井冈学者奖励计划项目(QNJG2019056)
自然资源部离子型稀土资源与环境重点实验室开放基金项目(2022IRERE203)。
