Synthesis of zeolitic materials from volcanic ash in presence and absence of cetyltrimethylammonium bromide
Zeolitic materials as Na-phillipsite, Na-K-phillipsite-like zeolites and the mixtures of zeolites (phillipsite+analcime and phillipsite+chabazite+analcime) were synthesized from volcanic ash, either in presence and absence of cetiltrimetilamonium bromide (CTAB). The ash sample used in the laboratory experiments contains 75.36 % SiO2 and 14.11 % Al2O3, abundances. The reaction time as well as the influence of CTAB were studied in the zeolitic materials crystallization. The experiments were carried out under hydrothermal conditions, autogenic pressure and temperature of 150 °C, as well as reaction time from 8 to 116 h. Products from this hydrotermal treatment were identified by X-ray diffraction (XRD) and characterized by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS). Of the zeolitic materials obtained the Na-K-phillipsite-like zeolite was found to be the most effective for the retention of cations Pb²+, Zn²+, and Ba²+.
| Main Authors: | , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Universidad Nacional Autónoma de México, Centro de Ciencias de la Atmósfera
2015
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| Online Access: | http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0188-49992015000200008 |
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