Utilization of Molasses Waste as Activated Carbon for Adsorption of Rhodamine B from Synthetic Waste

Ali Nur Muhammad Zaidin Balatif; Muhammad Muhammad; Rizka Mulyawan

doi:10.29103/jreece.v4i1.14673

Utilization of Molasses Waste as Activated Carbon for Adsorption of Rhodamine B from Synthetic Waste

Ali Nur Muhammad Zaidin Balatif, Muhammad Muhammad, Rizka Mulyawan

Abstract

The utilization of molasses waste as Rhodamine B adsorbent has been investigated by studying adsorption isotherm and adsorption kinetics. The sample used is a variation of the concentration of Rhodamine B 10, 25, and 50 mg/L for kinetics adsorption and 50 mg/L, 100 mg/L, 150 mg/L, 200 mg/L, and 250 mg/L for isotherm adsorption. Kinetic analysis adsorption being tested by pseudo-first-order and pseudo-second-order rate equation, as for the equilibrium equation being tested by Langmuir and Freundlich adsorption isotherms. Study shows that Langmuir equation model and pseudo-second-order are the most suitable to be applied. The adsorption constant is obtained of 1.1664 L/g and q_max of 221.8279 mg/g in Langmuir Equation. Whereas for pseudo second order equations obtained values of qe, _exp and qe, _cal which are slightly different. The qe, _cal values obtained were 8.142 mg/g, 23.141 mg/g, and 53.895 mg/g for various concentrations. K value is obtained with a range of 0.001754-0.000294 and a value of R²with a range of 0.8249-0.995 for various concentration. Intraparticle diffusion in this study is not the only rate control measure due to the plot linear at each concentration does not cross the origin.

Keywords

Adsorption; Molasses; Rhodamine B

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References

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DOI: https://doi.org/10.29103/jreece.v4i1.14673