PREPARATION OF RED MUD/GRAPHENE COMPOSITE AND ITS APPLICATION FOR ADSORPTION OF As(III) FROM AQUEOUS SOLUTION

Ha Xuan Linh

Abstract


In this study, we produce a red mud/graphene composite (REEG) via electrochemical activation graphite in basic red mud slurry. The adsorption properties for As(III) on REEG were investigated by batch method. The influence of pH (2-12), contact time (0-300 min), and the amount of adsorbent (0.02-0.1 g) on As(III) removal efficiency by the REEG were also determined. Results showed that the equilibrium time, the optimal pH, and mass of adsorbent were 240 min, pH 3.0 and 0.05 g, respectively. The maximum adsorption capacity (qmax) calculated by Langmuir isotherm model was found to be 21.367 mg/g. The results showed that REEG promises to be a good absorbent for As(III) removal from aqueous solution. 


Keywords


red mud; graphene; adsorption; arsenic; Langmuir.

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DOI: https://doi.org/10.15625/2525-2518/55/4C/12155 Display counter: Abstract : 200 views. PDF : 117 views.

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Published by Vietnam Academy of Science and Technology