“SYNTHESIS AND CHARACTERIZATION OF MICROPOROUS MATERIALS FROM NATURAL RESOURCES AND THEIR INDUSTRIAL APPLICATIONS”
Waleid Ibrahim Ahmed Shelbaia;
Abstract
The objective of this study was directed towards the full confirming conditions of zeolite synthesis and its environmental application on the removal of heavy metals from wastewater and uses as soil stabilization for road base construction to improve its engineering properties (shrinkage and swelling).
The bentonites used were collected from the area between 29° 32` N and 30° 52` E at Fayum area where they are found in the form of a horizontal bed about 4-5 m thick with hematite lenses and gypsum intercalation with thickness about 10-15 cm. This bed is mainly covered by about 50 cm weathering surfaceand the average content of studied bentonite is SiO2 and Al2O3 51.57 % and 20.6 % respectively with ratio 2.5 and also contains 2.6% Fe2O3& L.O. I. 17%.
The XRD chart of the natural bentonitic clay sample indicating the presence of montmorillonite, kaolinite, illite as clay minerals and quartz as non-clay component. Morphology of the solid sample could be seen through the use of scanning electron microscope (SEM) appear as aggregates of irregular or hexagonal flakes or less commonly of thin laths and confirmed by Energy-dispersive X-ray spectroscopy (EDX).
The Mechanism of the nucleation and crystallization process is dependent on the type and concentration of alkali, cryastallization temperature and aging period. Experimental procedure of zeolite synthesis was studied at different condition of aging period and crystallization temperature using two alkali solutions [KOH-NaOH] as a basic medium during hydrothermal treatment method.2 g of bentonite sample and 25 ml of different concentration of NaOH (1M, 3M, 5M) solution in a sealed Teflon reactor were stirred at 60 °C for about 12 h.Then the samples were dried at temperature 80 °C and 100 °C as crystallization temperature for different aging period 48 h, 7 days.
The bentonites used were collected from the area between 29° 32` N and 30° 52` E at Fayum area where they are found in the form of a horizontal bed about 4-5 m thick with hematite lenses and gypsum intercalation with thickness about 10-15 cm. This bed is mainly covered by about 50 cm weathering surfaceand the average content of studied bentonite is SiO2 and Al2O3 51.57 % and 20.6 % respectively with ratio 2.5 and also contains 2.6% Fe2O3& L.O. I. 17%.
The XRD chart of the natural bentonitic clay sample indicating the presence of montmorillonite, kaolinite, illite as clay minerals and quartz as non-clay component. Morphology of the solid sample could be seen through the use of scanning electron microscope (SEM) appear as aggregates of irregular or hexagonal flakes or less commonly of thin laths and confirmed by Energy-dispersive X-ray spectroscopy (EDX).
The Mechanism of the nucleation and crystallization process is dependent on the type and concentration of alkali, cryastallization temperature and aging period. Experimental procedure of zeolite synthesis was studied at different condition of aging period and crystallization temperature using two alkali solutions [KOH-NaOH] as a basic medium during hydrothermal treatment method.2 g of bentonite sample and 25 ml of different concentration of NaOH (1M, 3M, 5M) solution in a sealed Teflon reactor were stirred at 60 °C for about 12 h.Then the samples were dried at temperature 80 °C and 100 °C as crystallization temperature for different aging period 48 h, 7 days.
Other data
| Title | “SYNTHESIS AND CHARACTERIZATION OF MICROPOROUS MATERIALS FROM NATURAL RESOURCES AND THEIR INDUSTRIAL APPLICATIONS” | Other Titles | "تحضير وتوصيف مواد دقيقه المساميه من المصادر الطبيعيه وتطبيقاتها الصناعيه" | Authors | Waleid Ibrahim Ahmed Shelbaia | Issue Date | 2014 |
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