Fe_3O_4/黄腐酸复合材料的制备及其对Cu^(2+)吸附性能研究  

Preparation and Adsorption Properties of Fe_3O_4/Fulvic Acid Composite Materials for of Cu(Ⅱ)ions Removal

作　　者：靳廷甲 章祥林[1,2] 徐建[1] 

机构地区：[1]安徽建筑大学材料与化学工程学院 [2]安徽省先进建筑材料重点实验室,合肥230601

出　　处：《安徽建筑大学学报》2015年第3期87-93,共7页Journal of Anhui Jianzhu University

基　　金：安徽省长三角联合科技攻关项目(1101c0603053)

摘　　要：采用化学共沉淀法合成了一种黄腐酸(Fulvic acid,FA)包覆型磁性复合材料(Fe3O4/FA)。扫描电镜(SEM),粉末X射线衍射(XRD)和傅里叶变换红外光谱(FT-IR)测试表明合成产物颗粒大小约2μm,具有典型的反尖晶石结构,黄腐酸成功包覆在Fe3O4颗粒表面。Fe3O4/FA在外界低磁场作用下两分钟内便可从水溶液分离。Fe3O4/FA对Cu2+的吸附是一个假二级动力学过程,在1h左右达到平衡,较好的符合Langmuir吸附模型.在pH=7时最大吸附量可以达到9.38mg/g,和Fe3O4相比其对Cu2+的吸附能力显著增强。Fe3O4/FA可以作为一种有效去除重金属污染废水中Cu2+的吸附材料。Fulvic acid-coated Fe3O4 （Fe3 O4/FA） magnetic composite materials were prepared with chemical coprecipitation method. The results showed that the size of the product was about 2μm,and the Fe3O4/FA had a typical inverse spinel structure and successfully coated with fulvic acid on its surface, by SEM, XRD and FT-IR tests. The adsorption perperties indicated that the Fe3O4/FA could be separated from water with low magnetic field within two minutes, the procedure of Fe3 O4/FA adsorbing Cu^2＋ was a pseudo second-rate kinetic process, and sorption of Cu^2＋ to Fe3O4/FA reached equilibrium in about lh and agreed well to the Langmuir adsorption model. The max adsorbing capacity could reach 9. 38 mg/g at the pH： 7. Fe3 O4/FA had significant adsorption ability compared with pure Fe3O4. Fe3O4/FA can be used as a kind of adsorption material that effectively removes Cu^2＋ from waste water.

关 键 词：FE3O4 黄腐酸Cu^2+ 吸附 磁分离 

分 类 号：TN911.8[电子电信—通信与信息系统]