European Journal of Advanced Chemistry Research https://ej-chem.org/index.php/ejchem European Journal of Advanced Chemistry Research en-US editor@ej-chem.org (Editor-in-Chief) editor@ej-chem.org (Support Team) Wed, 01 May 2024 09:44:01 -0400 OJS 3.3.0.9 http://blogs.law.harvard.edu/tech/rss 60 Adsorption Behavior Investigation of Congored onto Nano-Magnetic Cupper-Nickel Ferrites Surface https://ej-chem.org/index.php/ejchem/article/view/152 <div class="page" title="Page 1"> <div class="section"> <div class="layoutArea"> <div class="column"> <p>Ferrite nanoparticles (NPS) of the structure CuNiFe2O4 were synthesized, and the auto combustion process was done using sol-gel. Several methods and nanomaterials have been identified using approaches such as Fourier- Transform Infrared Spectroscopy (FT-IR), X-Ray diffraction (XRD), and Filled Emission Scanning Electron Microscopy (FE-SEM). Measurements were made on the impact of temperature, pH, and contraction on the uptake behavior of CR dye. The ideal duration of interaction to achieve balance is 240 min, and the pH levels fall between 3 and 11. When compared to the Freundlich model, the desorption data demonstrated a good connection with the Lengmuir model. The thermodynamic parameters showed that ∆H was an exothermic reaction, ∆G was a spontaneous process, and ∆S had a negative value, indicating that the process was less disorderly and unpredictable.</p> </div> </div> </div> </div> Atyaf Mirdan Kadhem, Tariq Zbare Jassim Copyright (c) 2024 Atyaf Mirdan Kadhem, Tariq Zbare Jassim http://creativecommons.org/licenses/by-nc/4.0 https://ej-chem.org/index.php/ejchem/article/view/152 Mon, 13 May 2024 00:00:00 -0400 Characterization of Fipronil in Micellar Medium with Brij 35 https://ej-chem.org/index.php/ejchem/article/view/153 <div class="page" title="Page 1"> <div class="section"> <div class="layoutArea"> <div class="column"> <p>Fipronil is a phenyl pyrazole used as an insecticide to combat termites, moths, and locusts. Its low solubility in water represents a problem with its commercial formulations. In this work, an aqueous micellar medium was formed with Brij 35, calculating the critical micellar concentration at 0.01% (w/v) by UV-visible spectrophotometry and conductimetry. In this medium, the apparent pka was estimated at 12.6 from spectrophotometric data by the graphical method and Partial Least Squares Regression. Finally, its degradation kinetics in this medium at pH 12 was studied, finding that it conforms to a first-order model, with a half-life of 3.3 h, higher than the 2.4 h reported by other authors for an aqueous medium. In conclusion, the micellar medium favored the solubility of the compound in aqueous medium, allowing the estimation of its pka and retarding its chemical degradation.</p> </div> </div> </div> </div> Eduardo Esteban Reyes-Sánchez, Miguel Velázquez-Manzanares, María del Rocío Gutiérrez-Ortiz, Judith Amador-Hernández Copyright (c) 2024 Eduardo Esteban Reyes-Sánchez, Miguel Velázquez-Manzanares, María del Rocío Gutiérrez-Ortiz, Judith Amador-Hernández http://creativecommons.org/licenses/by-nc/4.0 https://ej-chem.org/index.php/ejchem/article/view/153 Tue, 14 May 2024 00:00:00 -0400