Scholarlink

<p>This study reports on the preparation of activated carbon using <i>Aframomum angustifolium</i> fruit shells (FPAA) and its application for the removal of caffeine from aqueous solution. The activated carbon was prepared using KOH activation in a 1:2 ratio, followed by pyrolysis at 500&#xa0;°C for 1&#xa0;h. The activated carbon (AC-K) was characterized using the point of zero charge of potential of hydrogen (pHpzc), N<sub>2</sub> adsorption–desorption analysis, scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM–EDX), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The surface of AC-K exhibited a mesoporous structure with an increased BET surface area from 335 to 407.6&#xa0;m<sup>2</sup>/g. The classical method and response surface methodology (RSM) using Box–Bohnken design (BBD) were used to optimize the performance of AC-K to remove caffeine from aqueous solutions. The results indicated that the adsorption aligned best with the Langmuir model (R<sup>2</sup> = 0.996 and RMSE = 0.3531), indicating the formation of a monolayer film. In addition, the adsorption was described by the pseudo-second-order model (R<sup>2</sup> = 0.995 and RMSE = 0.017). The highest caffeine removal efficiencies were 78.67 and 90.40% as determined using classical and BBD methods, respectively. Therefore, the preparation and use of an eco-friendly and previously unexplored precursor for activated carbon preparation is demonstrated in the current study. This study contributes to sustainable waste valorization while offering a promising alternative material for the removal of emerging contaminants such as caffeine from water systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

KOH-activated carbon from Aframomum angustifolium fruit shells for caffeine removal from aqueous solution

  • 期刊论文

  • 发表日期：

    2026年6月24日

查看全文
  • Baraka Alfaksad Kasazi,
  • Alinanuswe Joel Mwakalesi,
  • Emmy Solomon Lema

摘要

This study reports on the preparation of activated carbon using Aframomum angustifolium fruit shells (FPAA) and its application for the removal of caffeine from aqueous solution. The activated carbon was prepared using KOH activation in a 1:2 ratio, followed by pyrolysis at 500 °C for 1 h. The activated carbon (AC-K) was characterized using the point of zero charge of potential of hydrogen (pHpzc), N2 adsorption–desorption analysis, scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM–EDX), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The surface of AC-K exhibited a mesoporous structure with an increased BET surface area from 335 to 407.6 m2/g. The classical method and response surface methodology (RSM) using Box–Bohnken design (BBD) were used to optimize the performance of AC-K to remove caffeine from aqueous solutions. The results indicated that the adsorption aligned best with the Langmuir model (R2 = 0.996 and RMSE = 0.3531), indicating the formation of a monolayer film. In addition, the adsorption was described by the pseudo-second-order model (R2 = 0.995 and RMSE = 0.017). The highest caffeine removal efficiencies were 78.67 and 90.40% as determined using classical and BBD methods, respectively. Therefore, the preparation and use of an eco-friendly and previously unexplored precursor for activated carbon preparation is demonstrated in the current study. This study contributes to sustainable waste valorization while offering a promising alternative material for the removal of emerging contaminants such as caffeine from water systems.