Abstract
This research was aimed to determine the differences of physical and chemical characteristics from three natural zeolites from Tasikmalaya, Bayah and Lampung areas and to examine the characteristics of the natural zeolite adsorption capability to the micro-nutrients. The zeolite characterization analysis included some variables i.e. mineral types, morphologyand pH, CEC (Cation Exchange Capacity), BSP (Base Saturation Point), Cu and Zn content of zeolite.  Analysis of natural zeolite adsorption characteristics were done by Batch System. Data interpretation were done by  using the isothermal adsorption equation of Langmuir, Freundlich and Brunauer-Emmett-Teller (BET).The results showed that zeolite from Bayah and Tasikmalaya had a similiar morphology and it was categorized as mordenite types and platy structure, while zeolite from Lampung was a clinoptilolite type and tabular structure. The CEC of Tasikmalaya zeolite (137.58 cmol(-)kg-1) was higher than Bayah (96.75 cmol(-)kg-1) and Lampung (87.72 cmol(-)kg-1). Adsorption capability at the Langmuir equation of Cu by Bayah zeolite (47.619 mg g-1) was higher than Lampung (33.333 mgg-1) and Tasikmalaya (28.571 mg g-1). Effective adsorption of Zn by Bayah zeolite 19.417 mg g-1 was higher than  Lampung (16.949 mg g-1) and Tasikmalaya (1.395 mg g-1).
Highlights
In Indonesia, the volcanic soils have a total area of 5.4 millions ha or 2.9% of the total Indonesia archipelago (Subagjo et al 2004), whereas in the world the soils occupy about 0.84% of the earth’s surface (Leamy, 1984; Takahashi and Shoji 2002)
The volcanic soils, in most cases are classified into Andisols order but not all volcanic soils are Andisols, depend on the weathering stage and soil forming processes (Shoji et al 1993)
The objective of the study was to characterize the andic properties of the soils which were originated from the parent materials of five volcanoes with different climatic conditions in Flores Island, Indonesia
Summary
In Indonesia, the volcanic soils have a total area of 5.4 millions ha or 2.9% of the total Indonesia archipelago (Subagjo et al 2004), whereas in the world the soils occupy about 0.84% of the earth’s surface (Leamy, 1984; Takahashi and Shoji 2002). The volcanic soils have widely distributed along a belt in islands of Sumatra, Java, Bali, Nusa Tenggara, Celebes, and Halmahera. Some studies of the volcanic soils in last decade have been reported, especially from Sumatra (Fiantis and Van Ranst 1997; Alkasuma and Badayos 2003), Java (Arifin and Hardjowigeno 1997; Van Ranst et al.2002; Fauzi and Stoops 2004; Yatno and Zauyah 2008), North Sulawesi (Hikmatullah 2008), and Dompu Sumbawa (Sukarman et al 1993). Many studies of the volcanic soils have been reported from certain countries, such as from Japan (Shoji and Ono 1978), United States (Wada et al 1986; Shoji et al 1988), Mexico (Prado et al 2007), Ecuador (Zehetner et al 2003; Buytaert et al 2007), Costa
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