Mung Bean Shell (Vigna radiata L. Wilczek) - A Novel Cost-Effective Adsorbent for Removing Methylene Blue from Aqueous Solutions


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The aim of this study was to establish an economical and environmentally benign biosorbent for removing synthetic dyes (e.g. methylene blue, MB) from wastewater. The adsorption process of MB onto abandoned mung bean (Vigna radiata L. Wilczek) shell (MBS) was investigated in a batch system. The results showed that a wide range of pH (3.74 to 9.78) was favorable for the adsorption of MB onto MBS. Equilibrium studies indicated that the Langmuir model displayed the best fit for the isothermal adsorption data. The maximum monolayer adsorption capacity (165.92 mg g-1) calculated by the Langmuir equation was higher than that of many previously investigated low-cost bioadsorbents (e.g., peanut hull, wheat straw, etc.). The adsorption process best fitted pseudo-second-order kinetic model. Thermodynamic studies showed that the adsorption process was spontaneously, exothermic and was mainly a physisorption. This study indicates that MBS is a promising, unconventional, affordable and environmentally friendly bio-measure that is easily deployed for removing cationic dyes from wastewater.



Advanced Materials Research (Volumes 573-574)

Edited by:

Zhenyu Du and Peiyu Ren




H. Zhou et al., "Mung Bean Shell (Vigna radiata L. Wilczek) - A Novel Cost-Effective Adsorbent for Removing Methylene Blue from Aqueous Solutions", Advanced Materials Research, Vols. 573-574, pp. 68-79, 2012

Online since:

October 2012




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