Abstract：
Solid waste resulting from bauxite ore (red mud) was converted into useful products consisting in hydrogarnet together with zeolite. Red mud (RM) transformation from disposal material into new source was carried out using potassium hydroxide as an activator and hydrothermal process (HY) or vapor phase crystallization (VPC) approach. HY process was performed at 60, 90, and 130 °C whereas during the VPC method, red mud was contacted only with vapor from the distilled water heated at 60 and 90 °C. The results indicate the formation of katoite and zeolite L (LTL topology) with both approaches. All the synthetic products display magnetic properties. In addition, a preliminary investigation on arsenic removal from drinking water (from 59 to 86%), makes the synthetic materials appealing for environmental applications. Finally, the synthesis of a large amount of very useful newly-formed phases using vapor molecules confirms the efficiency of the innovative and green VPC process in waste material transformation.
摘要：
将铝土矿矿石（红泥）产生的固体废物转化为有用的产品，包括水石榴石和沸石。使用氢氧化钾作为活化剂和水热过程（HY）或气相结晶（VPC）方法，将赤泥（RM）从处置材料转化为新来源。HY过程在60、90和130°C下进行，而在VPC方法中，红泥仅与来自在60和90°C下加热的蒸馏水的蒸气接触。结果表明两种方法都形成了钾盐和沸石L（LTL拓扑）。所有的合成产品显示磁性能。此外,从饮用水中去除砷的初步调查（从59％到86％），使合成材料对环境应用具有吸引力。最后,使用蒸气分子合成大量非常有用的新形成的相证实了创新和绿色VPC工艺在废料转化中的效率。
