聚甲基丙烯酸-Fe_3O_4纳米吸附剂的吸附性能  

Adsorption porperty of polymethacrylic acid-Fe_3O_4 nanoadsorbent

作　　者：周利民[1] 刘峙嵘[1] 黄群武[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]东华理工学院核资源与环境教育部重点实验室,江西抚州344000

出　　处：《中国环境科学》2007年第1期137-140,共4页China Environmental Science

基　　金：江西省自然科学基金资助项目(050002)

摘　　要：以共沉淀法制备纳米Fe3O4，通过在颗粒表面接枝聚甲基丙烯酸（PMAA），制备了一种新型磁性纳米吸附剂．用透射电镜（TEM）、X-衍射分析（XRD）等对其进行了表征，并考察了它对酸性玫瑰红B（RB）的吸附性能．结果表明，制备的磁性微球平均粒径18nm．该吸附剂能有效去除RB，吸附速率很快，在5min内基本达到平衡．等温吸附数据符合Langmuir模型，饱和吸附容量为0．2mg／mg,吸附常数为7．2mL／mg．吸附为吸热过程，288—318K时，焓变为18kJ／mol.A novel magnetic nanoadsorbent was prepared by jointing polymethacrylic acid （PMAA） onto the granule surface of Fe3O4 nanoparticles, using coprecipitating method. This adsorbent was characterized by transmission electron microscopy （TEM） and X-ray diffraction （XRD） analysis; and its adsorption property on acidic rose red B （RB） was investigated. The mean diameter of the prepared magnetic nanoadsorbent was 18nm. The adsorbent could remove effectively RB. The adsorption rate was very rapid, and reached equilibrium basically within 5 min. The isotherm adsorption data accorded with the Langmuir model, with a maximum adsorption capacity of 0.2mg/mg and an adsorption constant of 7.2mL/mg. The adsorption was endothermic process, and the enthalpy change was 18kJ/mol at 288-318K.

关 键 词：纳米吸附剂 聚甲基丙烯酸 FE3O4 酸性玫瑰红B 

分 类 号：X703[环境科学与工程—环境工程]