High-performance of Cu@eggshells for toxic dyes catalytic wet peroxide oxidation: Kinetics, design of experiments, regeneration, and cost analysis

Mejbar, Fatiha; Miyah, Youssef; Benjelloun, Mohammed; Ssouni, Salma; Saka, Khadija; Lahrichi, Anissa; Zerrouq, Farid

doi:10.1016/j.cscee.2023.100572

Cited by 9 publications

(1 citation statement)

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“…With q e (equilibrium adsorption capacity); q t (adsorption capacity) and time (t), respectively, K 1 (min −1 ) and K 2 (g/mg•min) are the PFO and PSO rate constant is, respectively, calculated in [50][51][52].…”

Section: Kinetics Studymentioning

confidence: 99%

Insights into the Adsorption of Cr(VI) on Activated Carbon Prepared from Walnut Shells: Combining Response Surface Methodology with Computational Calculation

Yazid,

Bouzid,

El mouchtari

et al. 2024

Clean Technol.

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Walnut shells were used to produce highly microporous activated carbon. The prepared activated walnut shells were found to be an efficient adsorbent for removing Cr(VI). The study used the response surface methodology to investigate four independent variables effect: Cr(VI) concentration, pH, AC-Ws dose, and temperature on the Cr(VI) removal efficiency, which was studied in the concentration range of 0.1 to 0.3 g/L, 4 to 10, 15 to 35 °C and 1 to 5 mg/L, respectively. Through experiments designed, the optimum conditions were determined to be 4, 0.23 g/L, 298 k, and 2 g/L, respectively. At these conditions, the efficiency of removal was found to be 93%. The thermodynamic study of the adsorption process showed a spontaneous and exothermic nature. The kinetic model that explains the experimental data is the pseudo-second-order model. Furthermore, the Langmuir isotherm model was estimated to be an excellent representation of the equilibrium data. Quantum calculations and NCI analyses were also performed to get more light on the adsorption mechanism of the Cr(VI) atom and its complex form on the prepared AC-Ws surface.

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Section: Kinetics Studymentioning

confidence: 99%