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<p>With the increase in consumption rates day by day and the intensity of the processes occurring in the industry, wastewater containing many environmentally harmful substances emerges and threatens water pollution. In this study, sodium alginate-carbon nanotube adsorbent spheres were used to remove boron from aqueous solutions by adsorption. The adsorbent spheres used in the study were prepared by adding carbon nanotubes to a sodium alginate solution. Isotherm and kinetic models were studied with the available values. It was concluded that the kinetic model is Pseudo-First Order and the isotherm is the Freundlich isotherm. FTIR, TGA, SEM, and XRD results were examined for the characterization of sodium alginate-carbon nanotube spheres. The response surface method was used with different values of concentration, adsorbent amount, and samples taken at different times to investigate the effect of optimum conditions and variables on the study. In the experiments, 24.4% boron removal was achieved using sodium alginate-carbon nanotube adsorbent spheres. The highest efficiency value of 24.4% was reached at 26&#xa0;h with 4&#xa0;g of adsorbent, 9.66 pH value, and 1000&#xa0;mg/L boron concentration.</p>

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Boron Removal from Water by Carbon Nanotube Loaded Biopolymer Sodium Alginate Adsorbent: Isotherm, Kinetic, Optimization Studies

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Kubra Mod,
  • Guler Hasirci,
  • Nilufer Hilmioglu

摘要

With the increase in consumption rates day by day and the intensity of the processes occurring in the industry, wastewater containing many environmentally harmful substances emerges and threatens water pollution. In this study, sodium alginate-carbon nanotube adsorbent spheres were used to remove boron from aqueous solutions by adsorption. The adsorbent spheres used in the study were prepared by adding carbon nanotubes to a sodium alginate solution. Isotherm and kinetic models were studied with the available values. It was concluded that the kinetic model is Pseudo-First Order and the isotherm is the Freundlich isotherm. FTIR, TGA, SEM, and XRD results were examined for the characterization of sodium alginate-carbon nanotube spheres. The response surface method was used with different values of concentration, adsorbent amount, and samples taken at different times to investigate the effect of optimum conditions and variables on the study. In the experiments, 24.4% boron removal was achieved using sodium alginate-carbon nanotube adsorbent spheres. The highest efficiency value of 24.4% was reached at 26 h with 4 g of adsorbent, 9.66 pH value, and 1000 mg/L boron concentration.