Iris Publishers - Global Journal of Engineering Sciences (GJES)

Synthesis and Characterization of Modified Sepiolite for the Adsorptive Removal of Rhodamine B from Wastewater

Authored by Shaomin Liu


SDS/sepiolite was successfully synthesized as a low-cost adsorbent used in removal of Rhodamine B (RhB) from aqueous solution. The adsorbing capacity of RhB onto SDS/sepiolite shows a significant increase than the acid sepiolite. Analysis of the specific surface area, morphology, microstructure, chemical structure, chemical bonding substance and functional groups by BET, SEM, FT-IR proved the better adsorption capacity of SDS/sepiolite. The adsorption quantity was calculated to be 24.91mg/g under the optimum condition: SDS/sepiolite loadings of 0.02g, pH of 3 and 50 °C, the concentration of RhB is 35mg/L. obtained by analysis of influencing factors. It was found that a pseudo-second-order equation provided the best correlation to the process of adsorption, R2=0.999. Adsorption isotherm was fitted with Langmuir equation on different temperature, all R2>0.99. Re-adsorption showed SDS/sepiolite has reusable capacity in the adsorption of RhB in environmental protection.

 

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