Gier Della Rocca Daniela, Santos E Sousa Flávio Augusto, Domingos Ardisson José, Peralta Rosely Aparecida, Rodríguez-Castellón Enrique, Peralta Muniz Moreira Regina de Fátima
Laboratory of Energy and Environment (LEMA), Department of Chemical and Food Engineering, Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil.
Laboratory of Applied Physics, Center for the Development of Nuclear Technology, Federal University of Minas Gerais, 30123-970, Belo Horizonte, MG, Brazil.
Heliyon. 2023 Jun 8;9(6):e17097. doi: 10.1016/j.heliyon.2023.e17097. eCollection 2023 Jun.
The demand for sustainable and low-cost materials for wastewater treatment is increasing considerably. In this scenario, geopolymers have gained great interest, due to their good mechanical properties, their ability to be produced from industrial waste and their adsorbent or catalytic properties. In this study, novel magnetic mining waste based-geopolymers were produced by incorporating a residue from phosphate waste rocks, which were extensively characterized (XRD, TGA/DTA, SEM, BET, XRF, FTIR, Mössbauer, ss-NMR and XPS). The materials produced showed formation of a dense framework, even with 75% incorporation of the residue. The iron oxides and their magnetic properties remained unchanged, and their application in advanced oxidation reactions were evaluated, in particular, as catalysts in ozonation reactions. All of the geopolymers presented catalytic activity in the ozonation reaction, with catalytic ozone decomposition values of up to 2.98 min, which is 99 times greater than non-catalyzed reactions. Moreover, the reuse (performed in three cycles) and hot filtration-like experiments demonstrated, respectively, the regenerability and heterogeneous catalytic properties of the produced materials, showcasing the potential of these waste materials for catalytic geopolymer production. demonstrating the potential of this waste to produce catalytic geopolymers.
对用于废水处理的可持续且低成本材料的需求正在大幅增长。在这种情况下，地质聚合物因其良好的机械性能、能够由工业废料生产以及具有吸附或催化性能而备受关注。在本研究中，通过掺入磷尾矿残渣制备了新型磁性采矿废料基地质聚合物，并对其进行了广泛表征（XRD、TGA/DTA、SEM、BET、XRF、FTIR、穆斯堡尔谱、固体核磁共振和XPS）。即使掺入75%的残渣，所制备的材料仍显示出致密骨架的形成。氧化铁及其磁性保持不变，并对其在高级氧化反应中的应用进行了评估，特别是作为臭氧化反应的催化剂。所有地质聚合物在臭氧化反应中均表现出催化活性，催化臭氧分解值高达2.98分钟，比非催化反应高99倍。此外，重复使用（进行了三个循环）和类似热过滤的实验分别证明了所制备材料的可再生性和多相催化性能，展示了这些废料用于生产催化地质聚合物的潜力。证明了这种废料生产催化地质聚合物的潜力。
