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dc.contributor.authorJakkula, Vijay S.
dc.contributor.authorWilliams, Craig D.
dc.contributor.authorHocking, Trevor J.
dc.contributor.authorFullen, Michael A.
dc.date.accessioned2011-03-21T14:42:11Z
dc.date.available2011-03-21T14:42:11Z
dc.date.issued2011
dc.identifier.citationArchives of Agronomy and Soil Science, 57(1): 47–60
dc.identifier.issn0365-0340
dc.identifier.doi10.1080/03650340903211297
dc.identifier.urihttp://hdl.handle.net/2436/125246
dc.description.abstractPhillipsite (PHI) was synthesized in Na-K form, ion exchanged with NH4NO3 and compared with its natural counterpart. Zeolites were then characterized before and after ion exchange by X-ray diffraction, X-ray fluorescence, Thermogravimetric analysis and scanning electron microscopy. Ammonium exchanged Phillipsites were introduced as a soil amendment (2, 4 and 8% zeolite to soil loadings) to study the growth of maize (Zea mays) and compared with a control comprising NPK fertilizer added to soil. The affinity of the zeolite mineral Phillipsite for NH4+ in the presence of other cations is demonstrated by soil nutrient status. Results demonstrated that synthetic Phillipsite had a very high affinity towards NH4+ when introduced as a soil amendment, compared with its natural counterpart. Results were promising for ion exchange reactions in a zeolite-soil system, whereby cations present in soil exchanged for K+ more freely than NH4+ present in the synthetic Phillipsite framework.
dc.language.isoen
dc.publisherTaylor & Francis
dc.relation.urlhttp://www.informaworld.com/openurl?genre=article&doi=10.1080/03650340903211297&magic=crossref%7c%7cD404A21C5BB053405B1A640AFFD44AE3
dc.subjectSynthetic/natural Phillipsite
dc.subjectIon exchange
dc.subjectHigh-selectivity
dc.subjectHigh-affinity
dc.subjectSlow/controlled release
dc.titleHigh selectivity and affinity of synthetic Phillipsite compared with natural Phillipsite towards ammonium (NH4+) and its potential as a slow release fertilizer
dc.typeJournal article
dc.identifier.journalArchives of Agronomy and Soil Science
html.description.abstractPhillipsite (PHI) was synthesized in Na-K form, ion exchanged with NH4NO3 and compared with its natural counterpart. Zeolites were then characterized before and after ion exchange by X-ray diffraction, X-ray fluorescence, Thermogravimetric analysis and scanning electron microscopy. Ammonium exchanged Phillipsites were introduced as a soil amendment (2, 4 and 8% zeolite to soil loadings) to study the growth of maize (Zea mays) and compared with a control comprising NPK fertilizer added to soil. The affinity of the zeolite mineral Phillipsite for NH4+ in the presence of other cations is demonstrated by soil nutrient status. Results demonstrated that synthetic Phillipsite had a very high affinity towards NH4+ when introduced as a soil amendment, compared with its natural counterpart. Results were promising for ion exchange reactions in a zeolite-soil system, whereby cations present in soil exchanged for K+ more freely than NH4+ present in the synthetic Phillipsite framework.


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