负载型Fe^0/MCM-22的制备及去除水中Pb(Ⅱ)的研究  

Preparation of load Fe^0/MCM-22 and the removal of Pb(Ⅱ) from the water

作　　者：焦创[1,2] 成岳[1,2] 胡良峰[1,2] 潘顺龙[3] 

机构地区：[1]景德镇陶瓷学院材料学院,江西景德镇333403 [2]江西省先进陶瓷材料重点实验室,江西景德镇333001 [3]扬州大学环境学院,江苏扬州225000

出　　处：《功能材料》2013年第7期944-948,953,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51268018);江西省教育厅重点资助项目(GJJ11025)

摘　　要：以MCM-22分子筛为载体,利用浸渍、超声分散和液相还原等方法将纳米铁离子均匀地负载到其表面,制备出负载型Fe0/MCM-22复合材料。通过XRD、SEM和EDS等手段对复合材料进行了表征分析,并探讨不同反应条件对Fe0/MCM-22去除水体中Pb(Ⅱ)的影响。结果表明,Fe0/MCM-22保持了MCM-22分子筛的薄片状结构,这些薄片有规则的聚集在一起,而且紧凑有序。另外,纳米铁颗粒均匀地分散负载在薄片上,颗粒呈球形或椭球形,粒径约为50～80nm,其团聚明显减少。在常温下,初始Pb(Ⅱ)的浓度为140mg/L,pH值为5,Fe0/MCM-22的投加量为0.5g/L,反应时间为120min时,Pb(Ⅱ)的去除率可达92.52%。对其反应动力学研究表明,反应过程符合一级反应动力学。Fe^0/MCM-22 was synthesized by using dipping method,ultrasonic oscillations method and aqueous reduction method.The Fe^0/MCM-22 was characterized by using XRD and SEM.The removal efficiency of Pb（Ⅱ） by Fe^0/MCM-22 was evaluated under different reaction conditions.Experiments exhibited that Fe^0/ MCM-22 keeps slice structure as MCM-22,the slices were got together that is compact and orderly.In addition,iron nanoparticles that have diameters of 50-80nm was uniform distribution scattered and loaded on the slices,the particles wasn＇t aggregated.The high removal efficiency of Pb（Ⅱ）（92.52%） was obtained within 120min for 140mg/L of Pb（Ⅱ） at the optimal pH value of 5 and Fe^0/MCM-22 dosage of 0.5g/L at room temperature.The reaction process followed the pseudo-first order kinetics.

关 键 词：MCM-22分子筛 负载型Fe0 MCM-22 Pb(Ⅱ) 去除率 

分 类 号：TQ138.1[化学工程—无机化工]