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<p>This study explores the synthesis of activated carbon (AC) from <i>Posidonia oceanica</i> and composite biopolymer spheres with alginate (AC-PA) for Sr(II) removal. AC and AC-PA were characterized by SEM, XPS, BET, FT-IR, and Zeta analysis. Adsorption isotherms, kinetics, and thermodynamics revealed efficient adsorption. Langmuir isotherm indicated maximum capacities of 55.77&#xa0;mg/g for AC and 99.95&#xa0;mg/g for AC-PA. Intraparticle diffusion governed AC adsorption, while AC-PA showed chemisorption and diffusion. Thermodynamics confirmed the endothermic process. Results demonstrate AC and AC-PA as sustainable biosorbents for Sr(II) removal.</p>

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Strontium removed by activated carbon (AC) and activated carbon/pectin- alginate (AC-PA) composite derived ‘Posidonia oceanica’ seagrass

  • 期刊论文

  • 发表日期：

    2025年6月17日

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  • Zehra Sisman,
  • Imge Ipek Uysal,
  • Sabriye Yusan,
  • Sule Aytas,
  • Ikbal Gozde Kaptanoglu,
  • Ramazan Donat,
  • Cem Gok

摘要

This study explores the synthesis of activated carbon (AC) from Posidonia oceanica and composite biopolymer spheres with alginate (AC-PA) for Sr(II) removal. AC and AC-PA were characterized by SEM, XPS, BET, FT-IR, and Zeta analysis. Adsorption isotherms, kinetics, and thermodynamics revealed efficient adsorption. Langmuir isotherm indicated maximum capacities of 55.77 mg/g for AC and 99.95 mg/g for AC-PA. Intraparticle diffusion governed AC adsorption, while AC-PA showed chemisorption and diffusion. Thermodynamics confirmed the endothermic process. Results demonstrate AC and AC-PA as sustainable biosorbents for Sr(II) removal.