کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1411923 | 1501909 | 2007 | 8 صفحه PDF | دانلود رایگان |
The sorption behavior of K10, a type of montmorillonite for trimethoprim (TMP) drug, was studied by using batch technique under different pH and temperature. The interaction between K10 and TMP was investigated using SEM, and FTIR. It was observed that adsorption was increased between pH 2.5 and 6.3. By performing kinetic experiments, the pseudo-second-order kinetic model provides the best fit for TMP adsorption onto K10 montmorillonite. The sorption of TMP reached the equilibrium state after 6 h sorption time and has been described by using Langmuir, Freundlich and Dubinin–Radushkevich equations to obtain adsorption capacity values. The results indicate that the relative adsorption capacity values (Kf) are decreasing with the increase of temperature in the range of 298–318 K. The sorption energy values obtained from DR isotherm show that sorption of TMP onto K10 can be explained by ion exchange mechanism at 298, 308 and 318 K. The thermodynamic studies were conducted to find the thermodynamic parameters ΔH°, ΔS° and ΔG°. It was determined that adsorption process is spontaneous and exothermic in nature.
Journal: Journal of Molecular Structure - Volume 827, Issues 1–3, 17 February 2007, Pages 67–74