The study aims to use asphaltene particles (As) extracted from natural bitumen to synthesize activated carbon (ACAs). The asphaltene particles were mixed with a fixed weight of potassium hydroxide (KOH) as an activating agent, preheated to 600 °C, and then treated with 15% hydrofluoric acid (HF). The methylene blue (MB) 20 mg/l was used to determine the adsorption capacity of ACAs and reactivated carbon (RACAs). The morphology of ACAs and its components were characterized using scanning electron microscopy–energy dispersive X-ray (SEM–EDX) and Fourier-transform infrared spectroscopy (FTIR). The study included the application of adsorption isotherms Freundlich and Langmuir on the experimental data of the studied systems. The yield of ACAs was 92% of the raw material. The activated carbon displayed high adsorption capacity and can be reprocessed after reactivation using microwave radiation. The active surface area of ACAs is found to be 970 m²/g. The effectiveness and adsorption ability of ACAs and RACAs, as proven by its adsorption capacity (218.15 and 217.907 mg/g) for MB, demonstrate that ACAs and RACAs have a large external surface area and an extensive array of pores. The ACAs are most sensitive at 30 °C and neutral pH. The results also showed that the isotherms have a good fit to the experimented data.

中文翻译：

---

使用沥青质颗粒的高孔隙率活性炭合成

该研究旨在利用从天然沥青中提取的沥青质颗粒（As）来合成活性炭（ACA）。将沥青质颗粒与固定重量的氢氧化钾（KOH）作为活化剂混合，预热至600°C，然后用15％氢氟酸（HF）处理。使用亚甲基蓝（MB）20 mg / l来测定ACA和再活化碳（RACAs）的吸附容量。使用扫描电子显微镜-能量色散X射线（SEM-EDX）和傅里叶变换红外光谱（FTIR）对ACA及其组分的形态进行表征。该研究包括吸附等温线Freundlich和Langmuir在所研究系统的实验数据上的应用。ACA的产率为原料的92％。活性炭显示出高吸附能力，并且可以在使用微波辐射重新活化后进行再处理。发现ACA的有效表面积为970 m² /克。ACA和RACA对MB的吸附能力（分别为218.15和217.907 mg / g）证明了其有效性和吸附能力，表明ACAs和RACA具有较大的外表面积和大量的孔。ACA在30°C和中性pH下最敏感。结果还表明，等温线与实验数据非常吻合。