Low-Cost Bioadsorbents for the Removal of Aqueous Effluents

Authors

  • Amir Djellouli Laboratory of Physics, Matter and Radiation, Department of Process Engineering, Faculty of Science and Technology, University Mohammed Cherif Messaadia, Souk-Ahras, Algeria
  • Yamina Berredjem Laboratory of Water Treatment and Valorization of Industrial Wastes, Department of Chemistry, Faculty of Science, University Badji Mokhtar, Annaba, Algeria
  • Mohamed Yagoub Hydraulic Development and Environment Laboratory, University of Biskra, Biskra 07000, Algeria
Volume: 15 | Issue: 3 | Pages: 23944-23949 | June 2025 | https://doi.org/10.48084/etasr.10970

Received: 16 March 2025 | Revised: 8 April 2025 | Accepted: 22 April 2025 | Online: 4 June 2025


Corresponding author: Amir Djellouli

Abstract

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).

Keywords:

SSHB690, wastewater, 4-nitrophenol, kinetics, adsorption

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How to Cite

[1]
A. Djellouli, Y. Berredjem, and M. Yagoub, “Low-Cost Bioadsorbents for the Removal of Aqueous Effluents”, Eng. Technol. Appl. Sci. Res., vol. 15, no. 3, pp. 23944–23949, Jun. 2025.

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Copyright (c) 2025 Amir Djellouli, Yamina Berredjem, Mohamed Yagoub

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