摘要
合成了纳米Fe_3O_4磁核,采用沉积法将ZrO_2包覆在Fe_3O_4磁核表面形成ZrO_2/Fe_3O_4吸附材料,系统研究了吸附材料对水中Pb(Ⅱ)吸附和脱附行为。结果表明,ZrO_2已成功包覆在纳米Fe_3O_4磁核,具有超顺磁性,可在外加磁场作用下,实现从水中快速分离。当溶液pH为7.0,吸附时间35 min时,吸附剂对浓度5μg/m L的Pb(Ⅱ)吸附去除率几乎达到100%,在0.1 mol/L盐酸溶液中,可使吸附在吸附剂上的Pb(Ⅱ)完全解吸附,从而实现吸附剂的再生。吸附等温线符合Freundlich吸附公式,说明吸附属于非匀质吸附。
Magnetite Fe3O4 nanoparticles were prepared which was subsequently coated by ZrO2 via the deposition precipitation method,the adsorption and desorption behavior of the synthesized adsorbent were studied. The results demonstrated the adsorbents could be readily separated and recovered under external magnetic field. When pH = 7. 0,Pb（ Ⅱ） of 5 μg / m L,the absorption percent can reach 100% after 35 min and Pb（ Ⅱ） could be was absolutely eluted by 0. 1 mol / L hydrochloric acid. The adsorption was fitted well with Freundlich adsorption isotherm which showed the absorption was inhomogeneous.
出处
《应用化工》
CAS
CSCD
北大核心
2016年第7期1308-1310,1314,共4页
Applied Chemical Industry
基金
河南省教育厅科技公关项目(13B150965)
河南省教育厅科技公关项目(15A150088)
陕西省2015科技统筹创新工程计划(2015FWPT-18)
关键词
纳米吸附剂
磁性材料
四氧化三铁
二氧化锆
Pb(Ⅱ)
nanoparticle adsorbents
magnetite material
ferroferric oxide
zirconium dioxide
Pb（Ⅱ）
