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Optimization of an experimental study of cationic Pb metal adsorption by resin polymer. | LitMetric

Optimization of an experimental study of cationic Pb metal adsorption by resin polymer.

Sci Rep

Laboratory of Materials Advanced and Engineering Process, Department of Chemistry, Faculty of Sciences, University Ibn Tofaïl, B.P. 133, 14000, Kenitra, Morocco.

Published: November 2023

AI Article Synopsis

  • The study focused on using cationic resin to remove lead (Pb) ions from metallic solutions, with characterization techniques such as SEM, EDX, and GTA/GTD used to analyze the resin's structure and composition.
  • The efficiency of lead ion removal was influenced by factors like solution pH (optimal at 8.0, achieving 84.78% removal), concentration of Pb (II) ions, and the mass of resin used (1g resulted in 100% removal).
  • Temperature also affected the adsorption process, with higher temperatures leading to lower adsorption rates; kinetic studies indicated the process was fast, best described by a pseudo-second-order model, with the Langmuir model being most accurate for understanding lead adsorption by the

Article Abstract

To eliminate lead (Pb) ions from metallic solutions, the cationic resin in solid form was utilized. The characterization of the adsorbent was performed using GTA/GTD, SEM spectroscopy, and EDX analysis. The results of these analyses provided insights into the structure and composition of the resin. The removal of Pb (II) ions was found to be highly dependent on various parameters. Firstly, the pH of the metal solution played a crucial role, as the adsorption capacity increased with the pH of the solution, at a maximum equal to (R = 84.78%), at a pH = 8.0. Additionally, the concentration of Pb (II) ions present in the solution influenced the adsorption technique's capacity, with higher concentrations leading to increased adsorption, analysis overhead of high concentration present (100 mg L) of the metal lead (II) study, a saturation corresponding a plateau to the resin polymeric saturation is 93.18 mg g. To determine the optimal mass of the resin adsorbent, a study was conducted to maximize the removal of Pb (II) ions, at the mass 1.0 g showed that the proportion of inorganic pollutants removed from Pb (II) is entirely qualitative (100%). Furthermore, the effect of temperature on the adsorption process was investigated. It was observed that the rate of the Pb (II) adsorption process decreased as the temperature increased. Kinetic studies were performed to gain further insights into the adsorption process. Pseudo-first-order and pseudo-second-order models, along with the intra-particle diffusion model, were utilized for this purpose. The results indicated that the adsorption process was fast, as evidenced by the findings from the pseudo-second-order study. The saturation technical process was studied, employing several different isothermal models, including Langmuir, Freundlich, and Temkin. Among these models, the Langmuir model was found to best describe the phenomenon of lead metal adsorption by the resin polymeric, is equal to 11.23 mg g, with the experimental value precisely (R = 0.999). Finally, various thermodynamic techniques were applied to analyze the adsorption process. The thermodynamic parameters such as ΔG° (- 9.78 to - 9.27 kJ mol), ΔH° (14.85 kJ mol), and ΔS° (0.017 kJ mol) were determined. These values indicated that the adsorption process was endothermic and spontaneous, further emphasizing its impetuous nature. The results of the molecular dynamics calculations demonstrated that amino groups are very important in defining the characteristics of cation adsorption. We conclude that this new adsorbent has the potential to significantly improve the process of regularly removing heavy metal ions from wastewater.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10654399PMC
http://dx.doi.org/10.1038/s41598-023-46967-3DOI Listing

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