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Roxanne Kathlyn O. Alivio,Alchris Woo Go,Artik Elisa Angkawijaya,Shella Permatasari Santoso,Chintya Gunarto,Felycia Edi Soetaredjo 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
The use of extractives-free SCB (eSCB) as a renewable adsorbent for removing rhodamine B (RhB) in waterwas explored to contribute to strategies for conserving the environment and better use of naturalresources. Different initial pH (3–9) and RhB concentrations (10–1100 mg/L) at various temperatures(303–333 K) during adsorption were carried out to assess the uptake kinetics and equilibrium uptake. The Elovich and the multi-mechanistic models best describe the adsorption kinetics. The adsorption ofRhB on eSCB is primarily physisorption but may also involve chemisorption under certain conditions. The adsorption process co-occurs within and on the surface of the eSCB matrix. The adsorption capacityof eSCB for RhB is 88.71 mg/g at 318 K, and the Brouers-Sotologo model best describes the equilibriumuptake isotherm. The adsorption of RhB on eSCB is a spontaneous and exothermic process. This studyis the first to report on the regeneration and reuse of eSCB as an adsorbent for RhB. Extractives-freeSCB can be reused for at least 7 cycles, using 95% ethanol to remove the adsorbed dyes between cycles. The reused eSCB adsorbent retains 80 % of its adsorption capacity even after its 7th reuse.