Removal of Reactive Blue 49 (RB) Onto Untreated Peanut Shell (UPS) Waste-Kinetic Study, Modeling, Mechanism, and Regeneration of the Adsorbent 


Vol. 24,  No. 9, pp. 3211-3220, Sep.  2023
10.1007/s12221-023-00298-2


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  Abstract

Pollution of water caused by different contaminants is a serious threat and a challenging problem. Various toxins are discharged into water bodies from several industries and other sources thus causing a large pollution. Because of their hazardous nature, excessive usage of textile dyes is a major environmental concern. Therefore, the aim of this study was to evaluate the adsorption of Reactive Blue 49 (RB), a recalcitrant dye onto untreated Peanut Schell (UPS) from aqueous solutions in a batch system. However, the effects of operational factors like initial pH (2-12), contact time (0-60 min), adsorbent dose (1-10 g/L), RB concentrations (10-40 mg/L), and temperature (298-318 K) were investigated on the adsorption efficiency of UPS. The latter was characterized by BET surface area (Sarea=30.05 m2/g), the point of zero charge (pHpzc=6), FT-IR spectroscopy, and scanning electron microscopy (SEM). Batch studies were conducted to determine the optimal parameters required to reach the adsorption equilibrium. The maximum adsorption capacity of UPS for RB at 298 K was found to be (qmax=30.30 mg/g). The adsorption kinetic data were analyzed using the pseudo-first-order and pseudo-second-order models. It was established that the adsorption process obeys the pseudo-second-order kinetic model with a determination coefficient (R2) equal to 0.999. The thermodynamics parameters such as the standard free energy ΔG° (0.999, -4.45, and -9.82 kJ/mol), negative enthalpy ΔH° (-172.2 kJ/mol), and change of entropy (-0.544 J/mol/K) indicated a spontaneous and exothermic physisorption.

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  Cite this article

[IEEE Style]

M. Abbas and M. Trari, "Removal of Reactive Blue 49 (RB) Onto Untreated Peanut Shell (UPS) Waste-Kinetic Study, Modeling, Mechanism, and Regeneration of the Adsorbent," Fibers and Polymers, vol. 24, no. 9, pp. 3211-3220, 2023. DOI: 10.1007/s12221-023-00298-2.

[ACM Style]

Moussa Abbas and Mohamed Trari. 2023. Removal of Reactive Blue 49 (RB) Onto Untreated Peanut Shell (UPS) Waste-Kinetic Study, Modeling, Mechanism, and Regeneration of the Adsorbent. Fibers and Polymers, 24, 9, (2023), 3211-3220. DOI: 10.1007/s12221-023-00298-2.

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