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710 18 |
Ultima descărcare din IBN: 2023-11-02 02:06 |
Căutarea după subiecte similare conform CZU |
549.67:543.5 (1) |
Mineralogie. Studiul special al mineralelor (23) |
Metode fizico-chimice de analiză (altele decât metodele optice) (59) |
SM ISO690:2012 TSITSISHVILI, Vladimer, DOLABERIDZE, Nanuli, UROTADZE, Spartak, ALELISHVILI, Maia, MIRDZVELI, Nato, NIJARADZE, Manana. Ion exchange properties of georgian natural zeolites. In: Chemistry Journal of Moldova, 2017, vol. 12, pp. 95-101. ISSN 1857-1727. DOI: https://doi.org/10.19261/cjm.2017.413 |
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Chemistry Journal of Moldova | ||||||
Volumul 12 / 2017 / ISSN 1857-1727 /ISSNe 2345-1688 | ||||||
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DOI:https://doi.org/10.19261/cjm.2017.413 | ||||||
CZU: 549.67:543.5 | ||||||
Pag. 95-101 | ||||||
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Rezumat | ||||||
Ion exchange properties of Georgian analcime, phillipsite and scolecite have been studied. The exchange capacity of analcimes is higher for sodium cations, decreasing in the following series: Na >K >Ag >NH4 >Ca 2>Sr 2>Li , the selectivity sequence for the sodium-enriched form is NH4 >Ag >Li >Ca 2>K ~Sr 2. For phillipsite ion exchange isotherms prove the high selectivity towards NH4 and K depending on the origin of zeolite: K >NH4 >>Ca 2>Mg 2 for samples with comparatively low content of potassium, and NH4 >K >Na >>Ca 2>Mg 2 for samples with high K-content. For scolecite selectivity sequences depend on temperature and flow rate, at low temperatures and under static conditions the selectivity sequence is Sr 2 >Ba 2 >Rb >Ca 2 >Cs >K >NH4 >Na >Mg 2 >Li >Cd 2>Cu 2 >Mn 2 >Zn 2 >Co 2 >Ni 2. |
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Cuvinte-cheie ion exchange, analcime, phillipsite, scolecite |
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