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All Journal African Multidisciplinary Journal of Sciences and Artificial Intelligence African Journal of Sciences and Traditional Medicine
Sha’ato R
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Nursing Public Health

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Green Synthesis, Structural Characterization and Study of Thermal Behaviour of Cu2+ and Co2+ Complexes Derived from Salicylidene-3-Amino Benzoic Acid Ama S. O; Wuana R. A; Sha’ato R; Eneji I. S
African Multidisciplinary Journal of Sciences and Artificial Intelligence Vol 1 No 1 (2024): African Multidisciplinary Journal of Sciences and Artificial Intelligence
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/amjsai.v1i1.3741

Abstract

The Schiff base ligand Salicylidene-3-amino benzoic acid (SAB) was prepared by reacting salicylaldehyde with 3-amino benzoic acid. Its Cu2+ and Co2+ complexes were prepared by reacting ethanolic solutions of SAB with magnetically stirred solution of metal salts in distilled water using microwave-assisted heating for 30 min. The ligand and complexes were characterized on the basis of physical properties, FT-IR, UV-Vis, magnetic susceptibility, XRD and TGA/DTA. Unit cell dimensions obtained from XRD crystallography analysis agreed with the establishment of orthorhombic crystal structure. The spectroscopic studies revealed the presence of -C=N, -C=O, M-O, M-N, -OH and NO3 functional groups and this showed that the ligand coordinated to metal via N and O donors. The thermal decomposition of the complexes indicates the loss of lattice of water and decomposition of the ligand as key to the interpretation of successive weight loss.
Designing a Novel Hybrid Material: Hydroxyl Iron (III) – Bentonite, Kaolinte Composites for Enhanced Phenol Removal from Wastewater: A Comparative Study Egah G. O; Sha’Ato R; Ewenifa O. J; Itodo A. U
African Journal of Sciences and Traditional Medicine Vol 1 No 1 (2024): African Journal of Sciences and Traditional Medicine
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstm.v1i1.3500

Abstract

sources. This study examines Hydroxyiron (III) bentonite (HBC) and kaolin (HKC) composites for phenol removal from aqueous solutions (5–25 mg/L). The composites, produced by mixing bentonite and kaolin with Hydroxyiron (III) in a 3:1 ratio and calcined at 600°C for 1 hour, were tested at pH 2-11 and 25°C, with adsorbent dosages from 0.5 to 2.5 g in 50 mL solutions. Adsorption thermodynamics were developed for 1 hour, and kinetics experiments were performed at 25°C with a range of 10-60 minutes. Adsorption capacity increased with time, temperature, and concentration. HBC and HKC had pH values of 7.20 and 7.37, pHzpc of 10.10 and 11.00, conductivities of 1.657 and 1.763 μS/cm, bulky densities of 1.214 and 1.185 g/cm³, and attrition rates of 27.21% and 27.91%, respectively. XRF, FTIR, and SEM analyses confirmed hydroxyl group presence, indicating hydrogen bonding with phenol. The Blanchard pseudo-second order model best described HBC (R² = 0.906), and the pseudo-first order model best described HKC (R² = 0.957). Data fit the Langmuir model, indicating monolayer adsorption. Positive enthalpy, entropy, and Gibbs free energy values showed endothermic and non-spontaneous adsorption, with physisorption dominating chemisorption. Maximum adsorption efficiencies were 79.952% for HBC and 75.600% for HKC at 60 minutes, suggesting HBC is a more effective adsorbent. These results indicate that HBC and HKC can be used to remove organic pollutants from wastewater.
Co-Authors Ama S. O Egah G. O Eneji I. S Ewenifa O. J Itodo A. U Wuana R. A