Biosorption potential of surface-modi ed waste sugar beet pulp for the removal ofReactive Yellow 2 (RY2) anionic dye

Biosorption potential of surface-modi ed waste sugar beet pulp for the removal ofReactive Yellow 2 (RY2) anionic dye

Tetra{n-butylammonium bromide modi ed sugar beet pulp (TBAB{SBP) with good biosorption and re-generation potential was prepared for removal of dye from contaminated solutions. The decolorization performanceof TBAB{SBP was investigated using Reactive Yellow 2 (RY2) as a model dye. The characterization of the modi edbiosorbent was investigated by IR, SEM, zeta potential, and BET surface area analysis to discuss the decolorizationmechanism. The effects of initial pH, biosorbent amount, contact time, dye concentration, and ow rate on the treat-ment process were examined. The experimental kinetic data were well predicted by the pseudo-second-order kineticmodel and Langmuir isotherm with a maximum monolayer biosorption capacity up to 7.20 105mol g1. The mod-i ed biosorbent was also successfully used in dynamic ow treatment mode. Moreover, the prepared biosorbent couldbe regenerated using 0.01 M NaOH during 15 biosorption/desorption cycles. Experimental results indicated that theelectrostatic interaction, complexation, and ion exchange were possible interactions in the decolorization process. Thereal wastewater treatment application showed that TBAB{SBP is a suitable green-type biosorbent for the decolorizationof reactive dye-contaminated aquatic media.

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