羟基铝及复合改性蒙脱石对As(V)的去除性能  

Adsorption characteristics of As(V) using aluminium hydroxypolycation and inorganic-organic pillared montmorillonite

作　　者：任晓惠[1] 罗汉金[1,2] 张子龙[1] 胡冰洁 陈绮恩 

机构地区：[1]华南理工大学环境科学与能源学院,广州510006 [2]工业聚集区污染控制与生态修复教育部重点实验室,广州510006 [3]雅培(广州)营养品有限公司,广州510530 [4]佛山市南海区桂城中学南海国际教育中心,佛山528200

出　　处：《环境工程学报》2013年第5期1702-1708,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(40973074)

摘　　要：采用无机羟基铝及阳离子表面活性剂十六烷基三甲基溴化铵对天然蒙脱石进行无机及复合改性。在吸附过程中研究了反应时间、投加量和pH等变量对吸附性能的影响,同时进行吸附动力学及吸附等温线研究,吸附规律符合Langmuir等温方程式。采用X射线衍射、X射线荧光、傅里叶红外光谱等表征手段对未改性及改性蒙脱石进行性能表征。研究结果表明,羟基铝及复合改性蒙脱石对As(V)具有良好的吸附性能,在pH为4～10,初始砷浓度为2 mg/L,改性蒙脱石对As(V)的去除率接近99%。吸附机理主要为羟基铝表面络合吸附和静电吸附。The inorganic and inorganic-organic pillared montmorillonite were prepared using aluminium hydroxypolycation and cetyltrimethyl ammonium bromide （CTMAB）. The effects of reaction time, dosage, pH on adsorption efficiency were investigated, as well as the adsorption isotherms and kinetics. The adsorption isotherms fitted well with Langmuir isothermal equation. The characteristics of natural and modified montmorillonite were characterized by X-ray diffraction （XRD）, X-ray fluorescence （XRF）, Fourier transform infrared spectrum （FT- IR） , et al. The results showed that polymeric A1 and inorganic-organic modified montmorillonite presented good ad-sorption towards As（V）, under the condition with pH of 4-10 and initial As（V） concentration of 2 mg/L, the ad-sorption efficiency could exceed 99%. The sorption mechanisms were surface adsorption and electrostatic adhesion.

关 键 词：改性蒙脱石 AS(V) 吸附 表征 

分 类 号：X703[环境科学与工程—环境工程]