Sulfide adsorption by “green synthesized Fe3O4@ZnO core/shell” nanoparticles from aqueous solution and industrial rich amine solution: kinetic and equilibrium study

Gonbadi, Maryam; Sabbaghi, Samad; Saboori, Rahmatallah; Derakhshandeh, Abdollah; Narimani, M.M.; Fatemi, Ahmadreza

doi:10.1007/s13762-023-04755-6

Cited by 10 publications

(3 citation statements)

References 60 publications

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“…Furthermore, the values of the separation factor RL are between 0.05 and 0.55. This essential characteristic of the Langmuir isotherm defined by RL = 1/ (1 + KaCo) has been reported by many authors to indicate that the adsorption is favorable to the Langmuir isotherm model when 0 < RL < 1 [49][50][51].…”

Section: Equilibrium Studies and Isothermssupporting

confidence: 57%

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Kepdieu,

Djangang,

Njimou

et al. 2023

Preprint

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The present work aimed to use Oryza sativa husk (rice husk) in the fabrication of a nanosilica-doped smectic clay for the adsorption of Basic Blue 9 in synthetic aqueous solutions. Response surface methodology was used to evaluate the effects of the considered factors namely, initial dye concentration (10 - 30 mg/L), initial pH (8 - 11), and contact time (0 - 100 min) on the adsorption process. The regression model was found to be able to predict more than 99 % of the targeted response variation in the studied range (R2 = 99.98 %) based on 95% confidence. The analysis of variance proved the significance and the accuracy of the mathematical model. The F-values (1539.08) and p-values (< 0.05) generated by Minitab21 Sofware©, indicating that almost all the independent factors were statistically significant in the studied ranges. Based on the coefficients, initial dye concentration was more influential, followed by pH and contact time. Also, concentration x pH interaction was more effective followed by concentration x contact time. The pH x contact time interaction was very weak and those results were in accordance with factorial, surfaces, and contours plots. The pseudo-second-order kinetic and Langmuir models fitted well to the experimental data with determination coefficients of 0.976 and 0.965 respectively. Under the optimal conditions (30 mg/L, pH 11, t > 50 min; and adsorbent dose of 0.5 g/L, almost 96.33% of the dye was removed. Os-sm is thus an interesting and effective alternative for the removal of BB9 in aqueous solutions.

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Section: Equilibrium Studies and Isothermssupporting

confidence: 57%

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Kepdieu,

Djangang,

Njimou

et al. 2023

Preprint

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“…Futhermore, the values of the separation factor RL are between 0.05 and 0.20. This essential characteristic of Langmuir isotherm defined by RL = 1/ (1 + KLCo) has been reported by many authors to indicate that the adsorption is favorable to Langmuir isotherm model when 0 < RL < 1 [36,44,45] . The scatterplots on Figure 11…”

Section: Equilibrium and Modelling Fittingsupporting

confidence: 56%

Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Kepdieu,

Djangang,

Njimou

et al. 2023

AJPS

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Purpose: A study of the removal of dye Natural red 4 (NR4) by a low-cost silica-smectite clay labeled SSC was carried out. Methodology: Batch tests were carried on with some processing parameters namely initial dye concentration (10 - 50 mg/L), temperature (25 – 65 °C), adsorbent dose (1 – 5 g/L), initial pH (4 – 8) and contact time (0 - 120 min). Findings: The Energy of adsorption was less than 20 kJ/mol showing a physisorption process. Also, thermodynamics parameters such as enthalpy of activation ∆H* (19.0 kJ/mol), entropy of activation ∆S* (- 024 kJ/mol/K) and Gibbs free energy of activation ∆G* (90.57 - 100.17 kJ/mol) revealed that the adsorption of NR4 molecules onto SSC was endothermic and with no significant changes in the internal structure of the adsorbent. The pseudo-first order and pseudo-second order had a good correlation with experimental data with R2 = 0.99 and R2 = 0.98 respectively. Langmuir isotherm model matched well the equilibrium data with a maximum adsorption capacity Qm of 25.55 mg/g. and a correlation value of 0.98. Unique Contribution to Theory, Policy and Practice: The newly synthesized and characterized low-cost silica-smectite composite is effective in the adsorptive removal of natural red 4 dye from water wastes.

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“…Aquatic ecosystems are contaminated by a variety of pollutants, including organic and inorganic substances [4][5][6]. Most of these pollutants are non-biodegradable, difficult to remove, and do not completely permeate the subsurface due to their polar structure.…”

Section: Introductionmentioning

confidence: 99%

Removal of Cefixime from Wastewater Using a Superb nZVI/Copper Slag Nanocomposite: Optimization and Characterization

Moridi

Sabbaghi

Rasouli

et al. 2023

Water

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Nowadays, hospital wastewater contains a high concentration of toxic pharmaceutical contaminants, posing a significant threat to the environment, and human and animal life. Cefixime (CFX) is one such toxic contaminant that has a detrimental impact on both aquatic and terrestrial ecosystems. Therefore, it is essential to remove this compound using non-toxic and environmentally friendly procedures to ensure healthy drinking water. In this study, a low-cost and eco-friendly nano adsorbent (nZVI/copper slag) was synthesized and characterized using FESEM, XRD, EDX, FTIR, and zeta potential to remove CFX from wastewater. The Response Surface Methodology (RSM) was used to evaluate the effects of experimental factors including adsorbent dosage (2–10 g/L), pollutant concentration (10–30 mg/L), pH (2–10), and contact time (10–50 min) for efficient CFX elimination. The optimal conditions (adsorbent dosage: 7.79 g/L, pollutant concentration: 19.42 mg/L, pH: 4.59, and reaction time: 36.17 min) resulted in 98.71% CFX removal. The adsorption isotherm and kinetics data showed that the pseudo-second-order kinetics and Langmuir isotherm models were appropriate for CFX elimination. Furthermore, the nano adsorbent demonstrated 90% CFX elimination after up to six repeated cycles in regeneration and reusability testing. Finally, the nZVI/CS nano adsorbent can be an effective and promising solution for removing CFX from wastewater.

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Sulfide adsorption by “green synthesized Fe3O4@ZnO core/shell” nanoparticles from aqueous solution and industrial rich amine solution: kinetic and equilibrium study

Cited by 10 publications

References 60 publications

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Mathematical Modelling using Full Factorial Design in Response Surface Methodology Applied in the Adsorptive Removal of Dye Basic Blue 9 From Synthetic Aqueous Solutions Onto Oryza Sativa Husk-derived Nano-silica Doped Smectic Clay

Theoretical and Experimental Study of the Adsorption of Natural Red 4 Dye from Synthetic Aqueous Media Using a Low-cost Silica-smectite Composite

Removal of Cefixime from Wastewater Using a Superb nZVI/Copper Slag Nanocomposite: Optimization and Characterization

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