ADSORPSI ANION Cr(VI) OLEH BATU PASIR TERAKTIVASI ASAM DAN TERSALUT Fe2O3
| Main Author: | Gede Widihati, I. A. |
|---|---|
| Format: | Article application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Journal of Chemistry
, 2012
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| Subjects: | |
| Online Access: |
http://ojs.unud.ac.id/index.php/jchem/article/view/2696 |
Daftar Isi:
- The research is about adsorption of three sand type (river, black beach, and white beach) wated with Fe2O3with and without H2SO4 activated Cr(VI) in water. The research covers the determination of surface acidity of sandby acid-base titration method, their specific surface area by blue methylene method, and of the adsorption,equilibrium adsorption isotherm, and adsorption capacities to Cr(VI) by atomic absorption spectrophotometer.The results indicate that activated white beach sand (AA2) has highest surface acidity (0.4741 mmole/g).The highest specific surface area is given by the sand control (A) (30.8969 m2/g), of beach sand is given by white tosand of AA2 (30.1203 m2/g). Adsorption capacity of sand on Cr(VI) increases with H2SO4 activation. Hignesscapacities is shown by the white beach sand of AA2 (1.0601 mg/g). Free energy adsorption (GoAds) on Cr(VI) ofwhite beach sand is -15.5053 kJ/mole indicating a weak chemical adsorption.