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A study of Adsorption of Theobromine from Aqueous Solution on Attapulgite and Bentonite | ||
| journal of al-qadisiyah for pure science(quarterly) | ||
| Article 1, Volume 7, Issue 1, 2007, Pages 215-230 PDF (0 K) | ||
| Author | ||
| Saja S. Jabbar Al-Taweel | ||
| Abstract | ||
| This study is concerned with the adsorption of Theobromine from solution on the surfaces of attapulgite and bentonite, which are provided locally in Iraq. The purpose of this study into search for an active surfaces to be used as an antidote in treating of poisoning by this drug if taken beyond its usual dosage. UV-spectrophotometric technique has been used to produce quantitative adsorption data at different conditions of pH, ionic strength and temperature. The calculated data were in accordance with Freundlich equation and the adsorption isotherms are of S-curve type according to Giles classification. The results obtained show greater adsorption uptake of the drug on bentonite than attapulgite. The adsorption phenomenon was examined as a function of temperature (25, 37.5, 45oC). The extent of adsorption of Theobromine on the clays was found to decrease with increasing temperature (exothermic process). The basic thermodynamic functions have also been calculated. | ||
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