期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2015
卷号：6
期号：10
页码：2944-2957
出版社：University of Mohammed Premier Oujda
摘要：In this work, we study the adsorption in aqueous medium of two organic dyes, Methylene blue (MB) and Red195, on palm bark and sugarcane bagasse. Both plant materials have been first characterized. A series of experiments was then conducted to study the influence of different operating co nditions on the adsorption capacity. All results obtained show that the cationic dye "Methylene blue" is well adsorbed on the two studied supports than the anionic d ye "Red195" whose adsorption is low. The study of the effect of pH shows that the adsorption of MB d ye is affected b y too acidic medium. The second-order kinetic model is perfectly applicable in the case of adsorbent/adsorbate systems studied. The adsorption isotherms of MB dye on palm bark and sugarcane bagasse are described satisfactorily b y the Langmu ir model. The palm bark proved to be the mo st efficient support for removing MB dye. The maximum adsorption capacity o f palm bark and sugarcane bagasse is about 111.11 mg/g and 17.54 mg/g, respectively. Furthermore, the thermodynamic study of the adsorptio n of MB dye on the two studied plant materials shows that process is spontaneous, exothermic and physical in nature.
