In this study, red mud (RM) treated by sonication was used to form zeolite-layered double hydroxide composite (LTA-LDH). RM is a waste material primarily composed of iron oxides-hydroxides. LDH (layered double hydroxides) is a family of layered materials with a brucite structure characterized by ion-exchange capability and high specific surface area. The synthesis of composite LTA-LDH was performed by NaOH pre-fused RM treatment. The results indicate that ultrasonic process changes the RM mineralogical composition thus neutralizing this waste material by forming large amount of LDH. The addition of this modified RM to the conventional LTA synthesis, determines the formation of a composite zeolite which combines the properties of both LTA and LDH. Scanning electron microscopy (SEM) data show the presence of LDH plate shaped crystals on the synthetic zeolite surface. Preliminary LTA-LDH characterization for its adsorption properties was performed testing the efficiency with Reactive Orange 16 (RO16).

在这项研究中，通过超声处理的赤泥（RM）被用于形成沸石层状双氢氧化物复合材料（LTA-LDH）。RM是主要由氧化铁-氢氧化物组成的废料。LDH（层状双氢氧化物）是具有水镁石结构的层状材料家族，其特征在于离子交换能力和高比表面积。复合的LTA-LDH通过NaOH预熔融RM处理进行。结果表明，超声处理改变了RM矿物学组成，从而通过形成大量的LDH中和了这种废料。在常规的LTA合成中添加这种改性的RM，决定了结合了LTA和LDH的特性的复合沸石的形成。扫描电子显微镜（SEM）数据显示在合成沸石表面上存在LDH板状晶体。通过反应橙16（RO16）的效率对LTA-LDH的吸附性能进行了初步表征。