Monolayer and multilayer adsorption of pharmaceuticals on activated carbon: Application of advanced statistical physics models

Yazidi, Amira; Sellaoui, Lotfi; Dotto, Guilherme L.; Bonilla-Petriciolet, Adrián; Fröhlich, Andressa Cristiana; Lamine, Abdelmottaleb Ben

doi:10.1016/j.molliq.2019.03.101

Cited by 75 publications

(24 citation statements)

References 22 publications

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“…Dada et al [40] from previous studies reported that the larger the intercept, the greater the contribution of the nano adsorbent in the adsorption process. A similar trend was observed in this study which is also supported by [41].…”

Section: Adsorption Kinetic Studiessupporting

confidence: 92%

Novel plantain peel activated carbon–supported zinc oxide nanocomposites (PPAC-ZnO-NC) for adsorption of chloroquine synthetic pharmaceutical used for COVID-19 treatment

Dada

Inyinbor

Bello

et al. 2021

Biomass Conv. Bioref.

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Graphical abstract Chloroquine has been reported as an effective drug for the treatment of COVID-19 and with the rise in its administration and continued use, metabolites of chloroquine invariably find their way into the environment. There are many concerns recently on the presence of pharmaceuticals in the aquatic environment, hence the need for environmental remediation via effective adsorbent. Plantain peel activated carbon-supported zinc oxide (PPAC-ZnO) nanocomposite was prepared and characterized using physicochemical and spectroscopic techniques. The rate of uptake of chloroquine by PPAC-ZnO nanocomposite was investigated by batch technique under different operational parameters. PPAC-ZnO nanocomposite was characterized by various physicochemical techniques by S BET = 606.07 m 2 g −1 , pH(pzc) = 4.98 surface area by Saer’s method = 273.4 m 2 g −1 . The carboxylic, phenols, lactone, and basic sites were determined by the Boehm method. Chloroquine uptake was confirmed by FTIR and SEM before and after adsorption. Change in morphology after adsorption was revealed by scanning electron microscopy (SEM). X-ray diffraction (XRD) showed the crystallinity of PPAC-ZnO nanocomposite. The batch adsorption experiment results showed that adsorption capacity increased with an increase in temperature. The maximum chloroquine sorption was 78.89% at a concentration of 10 ppm and a temperature of 313 K. Equilibrium sorption fitted well to Langmuir and Temkin isotherms with a high correlation coefficient ( R 2 ) of 0.99. Pseudo-second-order best described the kinetic data and adsorption mechanism was pore diffusion dependent. Thermodynamics parameters (Δ G = − 25.65 to − 28.79 kJmol −1 ; Δ H = 22.06 kJmol −1 and Δ S = 157.69 Jmol −1 ) demonstrated feasibility, spontaneity, and endothermic behavior of the process with degrees of randomness. The activation energy for adsorption was less than 40 kJmol −1 suggesting a physisorption mechanism. This study results revealed that PPAC-ZnO nanocomposites are a sustainable and effective adsorbent for the removal of pharmaceutical waste.

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Section: Adsorption Kinetic Studiessupporting

confidence: 92%

Novel plantain peel activated carbon–supported zinc oxide nanocomposites (PPAC-ZnO-NC) for adsorption of chloroquine synthetic pharmaceutical used for COVID-19 treatment

Dada

Inyinbor

Bello

et al. 2021

Biomass Conv. Bioref.

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“…Consequently, limited interpretations of adsorption isotherm are provided. For years, a theoretical approach based on statistical physics has appeared and developed to explain the adsorption process at the molecular scale and to examine the adsorbent performance by proposing the models containing the parameters that have a physical significance (Yazidi et al 2019). For this, some approximations are taken into consideration.…”

Section: Statistical Physics Modelingmentioning

confidence: 99%

Calculation of adsorption isotherms by statistical physics models: a review

2021

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Adsorption is a major basic and applied phenomenon in many scientific disciplines. In particular, the design of adsorbents to remove pollutants from wastewater requires advanced knowledge of adsorption isotherms, which are useful tools to identify physicochemical factors that control adsorption performance. Recent modeling of adsorption isotherms has focused on the use of statistical physics. Here, we review the major adsorption isotherm models based on statistical physics. We discuss steric, energetic, and thermodynamic parameters.

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“…Therefore, the removal of the dye has attracted much attention of many researchers. Adsorption is regarded as one of the most promising decontamination techniques due to its simple operation, low cost as well as the wide source of adsorbents [9] .…”

Section: Introductionmentioning

confidence: 99%