In this work, we presented the paracetamol-activated carbon interactions and their effect on the adsorption capacity. We evaluated kinetic, equilibrium, and calorimetric data using different solvents (water, HCl 0.1 M, and NaCl 0.1 M) to evaluate the changes in the adsorbent-adsorbate interaction. In addition, the commercial activated carbon (AC) was modified through thermal (ACTT) and chemical (ACNA) methods to change the physicochemical properties of the adsorbents. The relative kinetic constants decrease with the content of basic groups on the activated carbon, indicating a lower influence of diffusion on the adsorption rate when the chemical interactions increase (0.1 _ACNA >0.09 _AC >0.03 _ACTT mmol g⁻¹). The adsorption capacity for AC at acidic pH increases slightly compared to tests carried out in the water. Under this condition, the adsorbed amount of paracetamol was 1.31 mmol g⁻¹. However, the maximum adsorption capacity was achieved on ACTT using water as solvent (1.57 mmol g⁻¹). The paracetamol adsorbed decreases in NaCl (osmotic, ionic strength) on all activated carbons by around 20%. The interaction enthalpy of the paracetamol-activated carbon interaction presents values between − 18.0 and 2.3 J per molecule adsorbed. The Gibbs energy released during the adsorption process is between − 33.1 and − 29.8 kJ mol⁻¹.

在这项工作中，我们介绍了扑热息痛与活性炭的相互作用及其对吸附能力的影响。我们使用不同的溶剂（水、HCl 0.1 M 和 NaCl 0.1 M）评估了动力学、平衡和量热数据，以评估吸附剂-被吸附物相互作用的变化。此外，商业活性炭（AC）通过热（ACTT）和化学（ACNA）方法进行改性，以改变吸附剂的物理化学性质。相对动力学常数随着活性炭上碱性基团的含量而降低，表明当化学相互作用增加时扩散对吸附速率的影响较小（0.1 _ACNA >0.09 _AC >0.03 _ACTT mmol g ^-1）。与在水中进行的测试相比，酸性 pH 值下活性炭的吸附能力略有增加。在此条件下，对乙酰氨基酚的吸附量为1.31 mmol g ^-1。然而，使用水作为溶剂（1.57 mmol g ^-1）在ACTT 上实现了最大吸附容量。所有活性炭上吸附的扑热息痛在 NaCl（渗透、离子强度）中降低了约 20%。对乙酰氨基酚-活性炭相互作用的相互作用焓呈现为每个吸附分子 - 18.0 至 2.3 J 之间的值。在吸附过程中释放的吉布斯能量介于 - 33.1 和 - 29.8 kJ mol ^{-1 之间}。