کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
625574 | 1455430 | 2010 | 6 صفحه PDF | دانلود رایگان |
The adsorption behavior of methylene blue from aqueous systems onto mesoporous SBA-3 has been studied. Batch experiments were carried out to measure the adsorption as a function of contact time, initial concentration (50–150 mg L− 1), pH (4–12), and temperature (303, 313 and 323 K). The equilibrium of the process was achieved within 1 h. The sorption of methylene blue on the mesoporous silica SBA-3 slightly increases with increasing pH, and temperature, indicating an endothermic process. Adsorption isotherms were fitted with the Langmuir, Freundlich and Temkin models. The kinetic data were analyzed using pseudo-first-order and pseudo-second-order models. The adsorption kinetics of methylene blue on mesoporous SBA-3 matched well with pseudo-second order kinetic model.
Journal: Desalination - Volume 261, Issues 1–2, 15 October 2010, Pages 61–66