Synthesis of Eco-Friendly Adsorbent Based on Chitosan-Tannic Acid via Solution Mixing Technique with High Uranium Adsorption Performance

Document Type : Research Article

Authors

1 Nuclear Materials Authority, Cairo, EGYPT

2 Egyptian Petroleum Research Institute, Nasr City, Cairo, 11727 EGYPT

Abstract

One of the main challenges in uranium extraction treatment is how to improve the adsorption performance of uranium with high adsorption capacity by using a simple and environmentally friendly technique. To tackle this challenge, in this study, effective eco-friendly adsorbents were synthesized based on chitosan-tannic acid (TACH) via a solution mixing technique. The chemical structures of the obtained adsorbents were characterized using Fourier transmutation InfraRed (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray (EDX) analysis. The effect of pH, temperature, adsorbent dosage, contact time, and initial U(VI) concentration on the removal capacity of the made adsorbents was investigated. The thermodynamic behavior and kinetic properties were studied. The adsorption data fit with the Lagergren equation, the sorption reaction is more favorably to be pseudo-second order sorption. The adsorption capacity of uranium achieved 155 mg/g which accords with Langmuir isotherm (150 mg/g). The synthesized TACH adsorbent showed the highest absorbance at PH 3, contact time 90 minutes, and temperature 25°C. These features make the prepared adsorbents in this study applicable as eco-friendly biopolymers with high uranium adsorption performance.

Keywords

Main Subjects

References

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