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Synthesis of Columnar Na-P Zeolite by Hydrothermal Process from Natural Zeolite of Korea  

Zhang, Yong-Seon (Dept. of Environment and Ecology, National Institute of Agricultural Science and Technology)
Jung, Pil-Kyun (Dept. of Environment and Ecology, National Institute of Agricultural Science and Technology)
Kim, Sang-Hyo (Dept. of Environment and Ecology, National Institute of Agricultural Science and Technology)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.36, no.6, 2003 , pp. 357-366 More about this Journal
Abstract
This study was conducted to develop n convenient and efficient granular type absorbent with high CEC from powdery zeolite, which is a waste produced while crushing the natural zeolite of Korea to get a particular particle size. The change of mineralogical characteristics during hydrothermal alternation of natural zeolite to Na-P zeolite in alkaline solution at various reaction times was determined by X-ray diffraction (XRD), scanning electron microscopy (SEM), and total elemental analysis. The columnar aggregate of Na-P Zeolite was produced by calcinating the natural zeolite-charcoal extrudates of about 3 mm diameter. In 24 hours reaction, clinoptillonite, mordenite and feldspar in natural zeolite were disappeared by 3 N NaOH treatment, while Na-P Zeolite with spherical granular structure was newly detected by XRD. As increasing reaction time, Si/Al ratio in remaining solution was deceased. The CEC of the synthesized material increased more than 2 times compared with that of natural zeolite, although the diameter of Na-P zeolite were rather increased.
Keywords
Adsorbent; Columnar aggregate; Hydrothermal process; Na-P zeolite;
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