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Abstract <p>Antibiotic contamination in water bodies has necessitated effective and sustainable wastewater treatment strategies. In this study, durian shell-derived activated carbon (DSAC) was synthesized via pyrolysis combined with KOH activation, and its adsorption performance for antibiotics from aqueous solutions was systematically investigated. DSAC was characterized by FTIR, XPS, Raman, XRD, and BET. The results revealed that DSAC-3 exhibited a high surface area (3008 m<sup>2</sup>&#xa0;g<sup>−1</sup>) and a well-developed porous structure. This study investigated the effects of pH, initial antibiotic concentration, adsorbent dosage, and temperature on the adsorption capacity of DSAC-3 for CHL and TC. The maximum adsorption capacities for TC and CHL calculated by the pseudo-second-order kinetic model reached 581.7&#xa0;mg&#xa0;g<sup>−1</sup> and 425&#xa0;mg&#xa0;g<sup>−1</sup>, corresponding to removal efficiencies of 78% and 45%, respectively. Thermodynamic parameters indicated the spontaneity and exothermic character of the adsorption process. The plausible adsorption mechanism was proposed to be primarily dominated by pore-filling, π-π EDA interactions, and van der Waals forces, with hydrogen bonding and electrostatic interactions as secondary contributors. These findings suggest that DSAC demonstrates great potential as an effective, low-cost adsorbent for antibiotic removal from contaminated water.</p>

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KOH-activated durian shell-derived carbon for chloramphenicol and tetracycline adsorption

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Yutong Zou,
  • Jingyuan Zhao,
  • Haixia Li

摘要

Abstract

Antibiotic contamination in water bodies has necessitated effective and sustainable wastewater treatment strategies. In this study, durian shell-derived activated carbon (DSAC) was synthesized via pyrolysis combined with KOH activation, and its adsorption performance for antibiotics from aqueous solutions was systematically investigated. DSAC was characterized by FTIR, XPS, Raman, XRD, and BET. The results revealed that DSAC-3 exhibited a high surface area (3008 m2 g−1) and a well-developed porous structure. This study investigated the effects of pH, initial antibiotic concentration, adsorbent dosage, and temperature on the adsorption capacity of DSAC-3 for CHL and TC. The maximum adsorption capacities for TC and CHL calculated by the pseudo-second-order kinetic model reached 581.7 mg g−1 and 425 mg g−1, corresponding to removal efficiencies of 78% and 45%, respectively. Thermodynamic parameters indicated the spontaneity and exothermic character of the adsorption process. The plausible adsorption mechanism was proposed to be primarily dominated by pore-filling, π-π EDA interactions, and van der Waals forces, with hydrogen bonding and electrostatic interactions as secondary contributors. These findings suggest that DSAC demonstrates great potential as an effective, low-cost adsorbent for antibiotic removal from contaminated water.