矿产保护与利用Issue(1)：101-106,6.DOI:10.13779/j.cnki.issn1001-0076.2018.01.030
氨基功能化硅胶的制备及其对镧离子的吸附行为研究
Amine Groups Functionalized Silica Gel:Preparation and Adsorption Behaviour of Lanthanum(Ⅲ)Ions
摘要
Abstract
In order to solve the problem of recovery from low concentration leachate in the late leac-hing stage of ion adsorption type rare earth ore,this work reports the preparation of porous silica gel adsorbents functionalized by amine groups (SiO2-NH2) and their application in adsorption of La (Ⅲ) ions from the simulated solution. The effects of pH,adsorption time,initial concentrations of La(Ⅲ) on La(Ⅲ) adsorption are systematically investigated. The effect of pH on the La(Ⅲ) ad-sorption is significant,and the optimal pH for La(Ⅲ) adsorption is 6.4. The adsorption isotherm can be described by Langmuir equation and La(Ⅲ) adsorption amount is calculated as 38.02 mg/g at 298 K. The adsorption kinetics follows the pseudo-second-order kinetics model and the ad-sorption equilibrium time is about 6 h. La(Ⅲ) adsorption capacity remains constant without obvi-ous variation after 12 adsorption-desorption cycles,which indicates that SiO2-NH2has an excel-lent recycle property.关键词
吸附/硅胶/氨基/镧Key words
adsorption/silica gel/amine groups/lanthanum (Ⅲ)分类
矿业与冶金引用本文复制引用
王万坤,王福春,伍玉娇,梁杰..氨基功能化硅胶的制备及其对镧离子的吸附行为研究[J].矿产保护与利用,2018,(1):101-106,6.基金项目
国家自然科学基金项目(51504073,51404081) （51504073,51404081）
贵州省自然科学基金项目(LH[2014]7373) （LH[2014]7373）
贵州省教育厅自然科学基金项目(KY[2015]433) （KY[2015]433）
贵州理工学院高层次人才启动基金项目(XJG20141104) （XJG20141104）
