The present paper reports the application of augmented simplex-centroid mixture design to obtain a high BET surface area activated carbon using as reactants KOH, K₂CO₃ and K₂C₂O₄. The optimum mixture composition was 2.51 g of KOH, 0.49 g of K₂CO₃ and absence of K₂C₂O₄, generating an optimized AC (AC_op) with S_BET value equals to 1984 m² g^-1. The results herein obtained show that low amounts of K₂CO₃ can catalyze the pore development in the presence of KOH, increasing the surface area. Furthermore, the fractal dimensions of AC_op are greater than 2.72, indicating the material has a complex pore structure with irregularities self-similar upon variations of resolution, as seen by SEM images. The TPD curves showed that the AC_op has different oxygenated molecular fragments, which agrees with the pH_PZC value (5.05). The AC_op was applied in the adsorption of rhodamine B (RhB) and metformin (Met) in both binary and monocomponent systems. The simultaneous adsorption at 30 °C reveals that the adsorption capacity of RhB is 630.94 mg g^-1, while for Met the value is 103.83 mg g^-1.

本文报道了增强单重质-质心混合物设计的应用，该方法使用KOH，K ₂ CO ₃和K ₂ C ₂ O ₄作为反应物来获得高BET表面积的活性炭。最佳的混合物组成为2.51 g KOH，0.49 g K ₂ CO ₃和不存在K ₂ C ₂ O ₄，从而产生S _BET值等于1984m²g ^-1的优化AC（AC _op）。本文获得的结果表明，少量的K ₂ CO ₃可以在KOH存在下催化孔的发展，增加表面积。此外，AC _op的分形维数大于2.72，这表明该材料具有复杂的孔结构，随着分辨率的变化，凹凸不平现象自相似，如SEM图像所示。TPD曲线显示AC _op具有不同的氧化分子片段，与pH _PZC值（5.05）一致。AC _op用于二元和单组分系统中若丹明B（RhB）和二甲双胍（Met）的吸附。在30°C下同时吸附表明RhB的吸附容量为630.94 mg g ^-1，而对于Met而言，该值为103.83 mg g ^-1。