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Low-Cost Bioadsorbents for the Removal of Aqueous Effluents

Article scientifique 2025 Anglais

Résumé

This study aimed to synthesize and manufacture Sunflower Seed Hull Biochar (SSHB690) as a promising, cost-effective, and eco-friendly adsorbent for removing 4-Nitrophenol (4-NP) from aqueous solutions. Several characterization techniques were used to analyze this biosorbent, including X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET), and Fourier Transform Infrared (FTIR) spectroscopy. The batch testing considered factors, such as temperature, pH, concentration, contact time, and material dose. The best removal of 4-NP was achieved at 25 °C (298 K) and pH = 5.5, yielding a maximum removal efficiency of 95%. The adsorption data fitted best with the Liu isotherm model with the highest Qmax and R² value, while the kinetic studies showed that the adsorption rate followed Pseudo-Second-Order (PSO). The thermodynamic parameters confirmed that the adsorption process was exothermic (ΔH° < 0) and spontaneous (ΔG° < 0).

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Djellouli, A., Berredjem, Y., Yagoub, M. (2025). Low-Cost Bioadsorbents for the Removal of Aqueous Effluents. https://doi.org/10.48084/etasr.10970

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Auteur(s)

Amir Djellouli Yamina Berredjem M. M. Yagoub

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