加热方式对膨胀蛭石物化属性及吸附特性的影响  

Effect of Heating Method on Physicochemical and Adsorption Properties of Expanded Vermiculite

作　　者：罗利明 罗浩[2,3] 彭同江[3] 孙红娟 先子均[4] 李松林[4] LUO Liming;LUO Hao;PENG Tongjiang;SUN Hongjuan;XIAN Zijun;LI Songlin(Nuclear Wastes and Environmental Safety Laboratory,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;School of Science,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Institute of Mineral Materials and Application,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;School of Environment and Resources,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学核废物与环境安全国防重点学科实验室,四川绵阳621010 [2]西南科技大学理学院,四川绵阳621010 [3]西南科技大学矿物材料及应用研究所,四川绵阳621010 [4]西南科技大学环境与资源学院,四川绵阳621010

出　　处：《硅酸盐学报》2022年第1期236-243,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金项目(42072048,42002039);四川省科技厅项目(21ZHSF0157);西南科技大学博士基金(19zx7137)资助项目。

摘　　要：以新疆蛭石为原料,采用插层-微波法和插层-焙烧法制备了2种高膨胀倍数的膨胀蛭石,利用X射线衍射、场发射扫描电镜等分析手段对产物的物相组成、微观形貌等进行表征分析,并测试了不同加热方式制备膨胀蛭石的阳离子交换容量(CEC)和亚甲基蓝(MB)吸附量。结果表明:2种加热方式制备的膨胀蛭石膨胀率具有明显的差异,焙烧膨胀蛭石(BCV)膨胀倍数(56.12倍)是微波膨胀蛭石(WCV)的1.4倍;在浓度为300mg/L的亚甲基蓝溶液中,焙烧膨胀蛭石吸附MB能力差,而微波膨胀蛭石因其具有高阳离子交换容量而对MB具有很好的吸附性能,吸附量最高可达391.26 mg/g。A series of expanded vermiculites with a high expansion ratio were prepared with a vermiculite from Xinjiang,China as raw material by an intercalation microwave method and an intercalation calcination method,respectively.The phase composition and morphology of the products were characterized by X-ray diffraction and scanning electron microscopy,and the cation exchange capacity and methylene blue(MB)adsorption capacity of the expanded vermiculite prepared by the two different methods were analyzed.The results show that there is a significant difference in the expansion ratios of expanded vermiculite prepared by the two methods,and the expansion ratio of calcined expanded vermiculite(BCV)is 0.4 times greater than that of microwave expanded vermiculite(WCV).For adsorption in a methylene blue solution with a concentration of 300 mg/L,the calcined expanded vermiculite has a poor adsorption capacity for MB,while the microwave expanded vermiculite has a good adsorption performance for MB due to its higher cation exchange capacity with an adsorption capacity of 391.26 mg/g.

关 键 词：微波 焙烧 膨胀蛭石 阳离子交换容量 吸附性 

分 类 号：TD985[矿业工程—选矿]