磁性离子交换树脂的制备及其对Cr^(3+)的吸附  

Preparation of Magnetic Ion-Exchanging Resin and Its Adsorption of Cr^(3+)

作　　者：李银萍[1] 汤凯[1] 郝营[1] 张翔[1] 陈志军[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002

出　　处：《材料科学与工程学报》2016年第2期301-305,228,共6页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目(20976168;21271160);河南省高校科技创新人才支持计划资助项目(2008HASTIT019)

摘　　要：采用原位共沉淀法将Fe3O4沉淀在离子交换树脂的孔道中制备出磁性离子交换树脂,并测试了其对水体中Cr3+离子的吸附性能。分别采用XRD、SEM、TG和振动样品磁强度计(VSM)等对磁性离子交换树脂进行了结构和性能表征。利用原子吸收光谱(AAS)研究了pH值、Cr3+初始浓度、磁性离子交换树脂的质量、温度和时间等不同因素对吸附性能的影响。结果表明:pH=6.8,吸附时间为3小时,为较为理想的吸附条件;当磁性离子交换树脂的用量为1g/L,Cr3+离子的初始浓度为100mg/L时,单位平衡吸附量为96mg/g。Magnetic ion-exchanging resin（MIER）was prepared using a in-situ co-precipitation and then used in the adsorption for heavy metal ions（Cr3＋）.Their morphology and chemical structure of the magnetic ion-exchanging resin were characterized by XRD,SEM,TG and Vibrating Sample Magnetometer（VSM）.The results have shown that initial concentration of Cr3＋,contact time,adsorbent dose,and pH value of solution affected the adsorption of Cr3＋by the magnetic ion-exchanging resin（MIER）.For the magnetic ion-exchanging resin,the optimum condition is listed as following：pH of 6,adsorption time of 4h.Under the condition of initial Cr3＋concentration of 100mg/L,the amount of adsorbents of 10 mg,the adsorption capacity gets 96mg/g.

关 键 词：磁性离子交换树脂 吸附 CR3+ 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业] TQ589