کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1260709 | 1496570 | 2010 | 8 صفحه PDF | دانلود رایگان |
In the present work, the influence of ionic strength on kinetics and equilibrium of methylene blue sorption from synthetic aqueous solutions, in single dye solutions, using almond peel as a sorbent material has been investigated in batch conditions. NaCl concentration played a certain part in sorption phenomenon: the methylene blue sorption increased as NaCl concentration increased. The pseudo second-order model was selected to describe the experimental data of methylene blue sorption kinetics. The results showed that the process follows a pseudo second − order kinetics. Equilibrium data were mathematically fitted to Langmuir equation which gave an acceptable fit over the whole equilibrium dye concentrations range. A high dye sorption was observed by this sorbent material: a maximum sorption capacity about 121.80 − 138.31 mg/g was achieved depending on NaCl concentration tested. Under these experimental conditions, the analysis of mechanistic steps involved in the sorption process confirms that methylene blue sorption process is particle-diffusion-controlled, with some predominance of some external mass transfer at the initial stages.
Journal: Journal of Taibah University for Science - Volume 4, 2010, Pages 31–38