Journal
CLEAN-SOIL AIR WATER
Volume 43, Issue 1, Pages 133-140Publisher
WILEY
DOI: 10.1002/clen.201400091
Keywords
Aluminosilicate; Edingtonite; Green technology; Recycling; Simple and cheap synthetic process
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Funding
- grant IDEA Giovani Ricercatori of the University of Bari Aldo Moro
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A clean and cheap procedure for the synthesis of zeolites is presented, using glass and aluminum wastes as starting materials. The products are aluminosilicate materials with a high cation exchange capacity (CEC: 259-389.5meq/100g) containing 25-30% of crystalline zeolites. Since the synthesized materials are free of potentially toxic elements, they could be safely used for environmental and agricultural applications. More specifically, a material containing 30% of zeolite A has been synthesized at 60 degrees C in one week, using NaOH as mineralizing agent. About 15% of zeolite A has been obtained at room temperature in six months. When KOH was employed, 25% of edingtonite has been produced in the final material after one week at 90 degrees C. All the materials have been characterized for crystallinity, crystal morphology, particle size, pore size, surface area, and CEC. The whole process has been designed with the aim to recycle useful waste materials and reduce at minimum energy consumption and the production of harmful greenhouse gases.
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