Laboratory of Applied Chemistry and Biomass, Department of Chemistry & Development, Faculty of Sciences Semlalia Marrakesh (FSSM), Cadi Ayyad University, Boulevard Prince My Abdellah, B.P. 2390, Marrakesh 40000, Morocco.
Laboratory of Applied Chemistry and Biomass, Department of Chemistry & Development, Faculty of Sciences Semlalia Marrakesh (FSSM), Cadi Ayyad University, Boulevard Prince My Abdellah, B.P. 2390, Marrakesh 40000, Morocco.
Int J Biol Macromol. 2024 Jan;254(Pt 3):127706. doi: 10.1016/j.ijbiomac.2023.127706. Epub 2023 Oct 31.
The present investigation involves the preparation of activated carbon (AC) from olive stones using a single-step activation process with potassium hydroxide (KOH) as an activating agent. The resulting activated carbon (AC) was used in conjunction with sodium alginate (Alg) to prepare the AC/Alg beads at different ratios (50/50, 60/40, and 80/20) for batch adsorption of methylene blue (MB). Characterization of the materials was conducted using FTIR, SEM, CHNS-O, and TGA-dTG thermal analysis. In batch adsorption studies, the AC/Alg beads were employed to remove MB from aqueous solutions, and various parameters, including contact time, initial pH of the MB solution, and initial MB concentration, were optimized to obtain maximum adsorption efficiency. The experimental results reveal that AC/Alg beads with a ratio of 60/40 exhibit the best adsorption performance. The pseudo-first-order kinetic model and the Langmuir adsorption isotherm, with a maximum adsorption capacity of 586 mg/g, best fit the experimental data.
本研究采用氢氧化钾（KOH）作为活化剂，通过一步法活化橄榄石制备活性炭（AC）。将所得的活性炭（AC）与海藻酸钠（Alg）结合，以不同比例（50/50、60/40 和 80/20）制备 AC/Alg 珠，用于亚甲基蓝（MB）的批量吸附。采用 FTIR、SEM、CHNS-O 和 TGA-dTG 热分析对材料进行了表征。在批量吸附研究中，采用 AC/Alg 珠从水溶液中去除 MB，并优化了各种参数，包括接触时间、MB 溶液的初始 pH 值和初始 MB 浓度，以获得最大的吸附效率。实验结果表明，比例为 60/40 的 AC/Alg 珠具有最佳的吸附性能。准一级动力学模型和 Langmuir 吸附等温线，最大吸附容量为 586 mg/g，最能拟合实验数据。
