Lignocellulosic wastes have garnered interest in activated carbon (AC) production owing to their abundance and cost-effectiveness. This research utilized coffee husk as a precursor for AC. The methodology involves impregnating the waste with varying proportions of phosphoric acid (H3PO4), 1:1 and 1:3 (masswaste:massH3PO4), and activation in a microwave oven, with different power and activation times. The N2 adsorption/desorption results demonstrated high surface areas (SBET) for the ACs. The optimized AC (C1:3-1000-10) was obtained using a time of 10 min, high impregnation ratio, and power, resulting in an SBET of 1200 m2 g−1. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra confirmed the presence of functional groups, such as hydroxyl and ester, on the AC surface. Adsorption tests with sulfamethazine (SMZ) showed a 225 mg g−1 remotion capacity, highlighting the waste potential for sustainable and economical AC production. This underscores the importance of optimizing activation parameters to enhance performance and application versatility in AC production from lignocellulosic sources.

中文翻译：

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来自农业工业废物的活性炭用作磺胺二甲嘧啶的吸附剂：令人着迷且环保的工艺


木质纤维素废物由于其丰富性和成本效益而引起了活性炭（AC）生产的兴趣。这项研究利用咖啡壳作为 AC 的前体。该方法包括用不同比例的磷酸 (H3PO4)、1:1 和 1:3（垃圾质量：H3PO4 质量）浸渍废物，并在微波炉中以不同的功率和激活时间进行激活。 N2 吸附/解吸结果表明活性炭具有高表面积 (SBET)。使用 10 分钟的时间、高浸渍比和功率获得了优化的 AC (C1:3-1000-10)，导致 SBET 为 1200 m2 g−1。傅里叶变换红外光谱 (FTIR) 和 X 射线光电子能谱 (XPS) 光谱证实了活性炭表面存在羟基和酯等官能团。磺胺二甲嗪 (SMZ) 的吸附测试显示其去除能力为 225 mg g−1，凸显了可持续和经济的活性炭生产的废物潜力。这强调了优化活化参数以提高木质纤维素来源活性炭生产的性能和应用多功能性的重要性。