Facile fabrication of metakaolin/slag-based zeolite microspheres (M/SZMs) geopolymer for the efficient remediation of Cs+ and Sr2+ from aqueous media

Enhanced Congo Red Adsorption and Photo-Fenton Oxidation over an Iron-Impeded Geopolymer from Ferruginous Kaolinite: Steric, Energetic, Oxidation, and Synergetic Studies

“…Approximately 10–15% of the produced quantity (7 × 10 5 tons) is discharged into the surrounding water bodies as untreated and nondegradable industrial wastewater, inducing varying side effects. 7 , 8 …”

“…CR is widely used in the paper, cosmetics, leather, and textile industries. 5 , 8 However, the seepage of dissolved CR molecules into water resources induces marked toxicity and environmental effects. 5 , 8 The presence of CR molecules depletes dissolved oxygen in the water and its distribution during photosynthesis, thereby having a negative impact on the aquatic ecosystem.…”

“… 5 , 8 However, the seepage of dissolved CR molecules into water resources induces marked toxicity and environmental effects. 5 , 8 The presence of CR molecules depletes dissolved oxygen in the water and its distribution during photosynthesis, thereby having a negative impact on the aquatic ecosystem. 9 Moreover, there are several health-related side effects associated with CR pollution, including respiration problems, vomiting, carcinogenic and mutagenic effects, and diarrhea.…”

“… 19 , 20 Additionally, they are characterized by marked surface reactivity, a large surface area, ordered porous structures, high organic and inorganic adsorption capacities, and ion exchange properties. 8 , 20 − 22 It has been reported that the structure of a typical geopolymer has a dearth of active adsorption sites, which reduces its capacity as an adsorbent; additionally, the polymer contains no active catalytic sites that may be used during the oxidation reactions. 23 …”

Slag-based geopolymer microsphere-supported Cu: a low-cost and sustainable catalyst for CO2 hydrogenation

“…Geopolymers are naturally porous without the need for costly structure directing agents, which makes them environmentally friendly, low-cost materials. In addition to being used in building materials, 10,11 geopolymers are also used in ceramics, 12 separation, 13,14 water remediation, 15–19 heavy metal adsorption, 18,20,21 3D printing 22,23 and catalytic materials. 24…”