|Title: ||High selectivity and affinity of synthetic Phillipsite compared with natural Phillipsite towards ammonium (NH4+) and its potential as a slow release fertilizer|
|Citation: ||Archives of Agronomy and Soil Science, 57(1): 47–60|
|Publisher: ||Taylor & Francis|
|Journal: ||Archives of Agronomy and Soil Science|
|Issue Date: ||2011 |
|Additional Links: ||http://www.informaworld.com/openurl?genre=article&doi=10.1080/03650340903211297&magic=crossref%7c%7cD404A21C5BB053405B1A640AFFD44AE3|
|Abstract: ||Phillipsite (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.|
|Keywords: ||Synthetic/natural Phillipsite|
|Appears in Collections: ||Plant and Environmental Research Group|
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