Zeolite Synthesis from Natural and Waste Materials and the Double Environmental Benefits

Zeolites' synthesis from low-value precursors and their environmental benefits are reviewed.A case study approach is used where natural resource-based synthesis and a commercialchemical route are compared for environmental accountability, focusing on energy and material consumption and greenhouse gas emissions.Using natural or waste raw materials is recommended; it significantly reduces energy consumption by 0.02 kWh, lowers CO2 emissions by 0.3 kg, and decreases material costs by 6 USD/kg of zeolite produced, compared to chemical precursors.Wastematerials usage for zeolite fabrication is highlighted for its notable advantages, including land-space conservation, positive health impacts, and pollution mitigation.Key conditions for sustainable synthesis include proper aging, alkaline-fusion, aluminum-content adjustments, and waste-liquid recycling.