凹凸棒石烧结硅藻土多孔陶器及吸附亚甲基蓝性能

Preparation of Diatomite/Palygorskite Porous Ceramics and Performances of Adsorption Methylene Blue

以硅藻土和凹凸棒石粘土为原料,烧结硅藻土/凹凸棒石多孔陶器。采用X射线衍射分析(XRD)和扫描电镜(SEM)等手段对样品进行表征,并从吸附亚甲基蓝性能评估材料对印染废水的吸附性能。结果表明:硅藻土和凹凸棒石粘土质量比为20∶80,850℃烧结得到样品保留有硅藻土多孔构造,凹凸棒石相转变为顽火辉石相;样品吸水率为41.12%,抗折强度为2.76 MPa以及收缩率为4.95%。对亚甲基蓝溶液吸附实验表明:样品对亚甲基蓝溶液有较好吸附效果,吸附量为3.634 mg/g。

Diatomite and palygorskite porous ceramics were prepared from diatomite and palygorskite by sintering method. The structures and micrographs of specimens were characterized by X-ray diffraction （XRD） and scanning electron microscopy （ SEM）. The ability of adsorption dye wastewater was measured by adsorptions of methylene blue from aqueous solution. The results of experiment show that diatomite/palygorskite porous ceramics was prepared from diatomite and palygorskite of mass ratio was 20 ： 80 and sintered at 850 has optimal performance, it water adsorption was 41. 1 2 % , flexural strength was 2. 76 MPa and shrink rate was 4. 95% . Some porous structure of diatomite were retained, the phase of enstatite has been transformed from palygorskite. The phenomenons of adsorption experiment show that sample had better adsorption effect of methylene blue solution and adsorbed amount was 3. 634 mg/ g.