The removal of Bisphenol A, 2,2-bis (4-hydroxyphenyl) propane (BPA) in fixed-bed columns was investigated by breakthrough adsorption tests at different operation conditions and further prediction by a mathematical model to describe the adsorption-diffusion process onto two synthesized carbon porous materials. In this study, a xerogel (RFX) prepared by an optimized conventional sol-gel method and a lignin-based activated carbon (KLP) obtained via chemical activation were used in batch and fixed-bed adsorption experiments. The materials were fully characterized and their adsorptive properties were compared to those obtained with a commercial activated carbon (F400). RFX and KLP materials reached the equilibrium adsorption in only 24 h, whereas F400 activated carbon required 48 h. In addition, F400 and KLP adsorbents showed higher equilibrium adsorption capacity values (q_e = 0.40 and 0.22 kg/kg, for F400 and KLP, respectively) than that obtained for the xerogel (q_e = 0.08 kg/kg). Both synthesized carbon-adsorbents were studied in fixed-bed adsorption tests, exploring the effect of the operation conditions, e.g., initial BPA concentration (0.005–0.04 kg/m³), weight of adsorbent (0.01–0.05 g) and volumetric flow rate (0.2 to 1.0 mL/min), on the adsorption performance of the column. All the tested adsorption columns reached the equilibrium in a very short time, due to the efficient dimensionless of the bed. Additionally, the regeneration of the exhausted adsorbent was studied, achieving the total reuse of the solids after three consecutive cycles using methanol as regeneration agent. Finally, a mathematical model based on mass conservation equations was proposed, allowing to efficiently fit the experimental BPA breakthrough curves and estimate the external and adsorbed-phase mass transfer coefficients with a high accuracy.

通过在不同操作条件下的突破性吸附试验研究了固定床塔中双酚A，2,2-双（4-羟苯基）丙烷（BPA）的去除情况，并通过数学模型进行了进一步预测，以描述在吸附床中的吸附-扩散过程。两种合成的碳多孔材料。在这项研究中，通过分批和固定床吸附实验使用了通过优化的常规溶胶-凝胶法制备的干凝胶（RFX）和通过化学活化获得的木质素基活性炭（KLP）。对该材料进行了充分表征，并将其吸附性能与商业活性炭（F400）进行了比较。RFX和KLP材料仅在24小时内达到平衡吸附，而F400活性炭则需要48小时。此外， F400和KLP的_e = 0.40和0.22 kg / kg，而干凝胶的_e（q _e  = 0.08 kg / kg）。两种合成的碳吸附剂均在固定床吸附测试中进行了研究，探索了操作条件的影响，例如初始BPA浓度（0.005-0.04 kg / m ³），吸附剂的重量（0.01-0.05 g）和体积流速（0.2至1.0 mL / min）对色谱柱的吸附性能。由于床的有效无因次，所有测试的吸附柱都在很短的时间内达到平衡。另外，还研究了废吸附剂的再生，使用甲醇作为再生剂，在连续三个循环后实现了固体的完全再利用。最后，提出了一种基于质量守恒方程的数学模型，可以有效拟合实验中的BPA突破曲线，并以高精度估算外部相和吸附相的传质系数。