氧化铝负载多孔沸石球的制备及其在As吸收中的应用  

Preparation of Active Alumina Film Supported Multi-pore Zeolite Balls and Application of This Porous System in As Adsorption

作　　者：崔光[1] 付云飞[2] 罗军[1] 刘培生[1] 丁爱中[2] 

机构地区：[1]北京师范大学核科学与技术学院,北京100875 [2]北京师范大学水科学研究院,北京100875

出　　处：《化学学报》2012年第9期1059-1065,共7页Acta Chimica Sinica

基　　金：中央高校基本科研业务费专项资金(No.2009SD-26);北京师范大学测试基金(C10)资助项目~~

摘　　要：通过粉末烧结法制备了多孔沸石球,烧结温度为1100～1300℃,烧结时间为1 h.所用原料为天然斜发沸石粉末,烧结所得多孔沸石球的直径为3～5 mm,宏孔孔径约为1 mm,抗压强度可达1.703×106Pa.通过对比烧结前后沸石的X射线衍射谱和红外光谱,对烧结机理进行了初步分析.采用BET气体吸附法测得该多孔沸石的比表面积为7.053m2/g.通过SEM分析也观察到了该多孔沸石具有优良的大孔和宏孔结构.在上述多孔沸石表面负载活性氧化铝,得到了对砷离子具有较强吸附能力的活性氧化铝负载多孔沸石球,并对其吸附机理进行了研究.研究表明,该沸石球在水处理方面有广阔的应用前景.A new kind of multi-pore zeolite ball was prepared by powder sintering method at 1100- 1300 ℃ for 1 h. Nature zeolite clinoptilolite was used as raw material. The diameter of sintered zeolite ball was 3 45 mm and the macro-pore diameter in the zeolite ball was about 1 mm. Compressive strength of the zeo- lite ball can reach 1.703 × 106 Pa. Sintering mechanism was studied by comparing the XRD and IR patterns of nature zeolite and sintered zeolite. Specific surface area of the multi-pore zeolite ball was calculated by BET adsorption method as 7.053 m2/g. Plenty of macro-pores and meso-pores were observed on the multi-pore zeolite ball by SEM method. Activated alumina was supported on the ball and a kind of multi-pore zeolite ball which has a good ability in absorbing the As ions was prepared. The mechanism of As adsorption on multi-pore zeolite balls was also studied. Research shows that the activated alumina supported zeolite ball has a wide application prospect in waste water treatment.

关 键 词：多孔沸石 粉末烧结 活性氧化铝负载 砷吸附 

分 类 号：X703[环境科学与工程—环境工程]