Use of papaya seeds as a biosorbent of methylene blue from aqueous solution

作者：Paz Diego S; Baiotto Alexandre; Schwaab Marcio; Mazutti Marcio A; Bassaco Mariana M; Bertuol Daniel A; Foletto Edson L; Meili Lucas^*

来源：Water Science and Technology, 2013, 68(2): 441-447.

DOI：10.2166/wst.2013.185

• adsorption
• equilibrium
• kinetic
• methylene blue
• papaya seed

In this study papaya seeds were used to remove methylene blue dye from aqueous solution. Papaya seeds were characterized as possessing a macro/mesoporous texture and large pore size. Studies were carried out in batches to evaluate the effect of contact time and pH (2-12) on the removal of dye. It was observed that the adsorption of dye was better in the basic region (pH 12). The equilibrium data were analyzed using Langmuir, Freundlich, Dubinin-Raduschkevich, Tempkin, Jovanovich, Redlich-Peterson, Sips, Toth and Radke-Prausnitz isotherms. The equilibrium data were best described by the Langmuir isotherm with a maximum adsorption capacity of 637.29 mg g(-1). Adsorption kinetic data were fitted using the pseudo-first-order and pseudo-second-order model. The adsorption kinetic is very fast and was best described by the pseudo-second-order model.

• 出版日期2013