Abstract We evaluated the effect of the ionic strength (INaCl = 0, 0.01 M, 0.1 M) on the adsorption of acetaminophen and salicylic acid on two activated carbons (CAG and CAR1073) from equilibrium data and immersion calorimetry. The adsorption isotherms were adjusted to Langmuir and Freundlich models, and the adsorption capacity in each system was calculate. In the adsorption carried out in water, the adsorption capacities are greater than the systems with change in the ionic strength on both activated carbons. The adsorption capacities in water are QI=0 CAG = 1.83 mmol g−1 and QI=0 CAR1073 = 1.55 mmol g−1 for the salicylic acid and acetaminophen respectively. In the activated carbon CAG the ionic strength (NaCl 0.1 M) decrease the adsorbed amount (Q) for salicylic acid (AcSc) and acetaminophen (ACE) adsorption in a 54 % and 67 % respectively. The thermodynamic analysis were carried out from immersion calorimetry in solutions of salicylic acid or acetaminophen with concentrations between 6.6 × 10−2 and 7.2 mmol L-1. The immersion enthalpies were between −7.63 and −68.1 J g-1. Additionally, the interaction enthalpy, Gibbs energy and entropy change were determinated.

中文翻译：

---

对乙酰氨基酚和水杨酸吸附在颗粒活性炭上的热力学分析：化学表面的重要性和离子强度的影响

摘要 我们通过平衡数据和浸入式量热法评估了离子强度（INaCl = 0、0.01 M、0.1 M）对乙酰氨基酚和水杨酸在两种活性炭（CAG 和 CAR1073）上吸附的影响。将吸附等温线调整为 Langmuir 和 Freundlich 模型，并计算每个系统的吸附容量。在水中进行的吸附中，吸附容量大于两种活性炭离子强度变化的系统。水杨酸和对乙酰氨基酚在水中的吸附容量分别为 QI=0 CAG = 1.83 mmol g-1 和 QI=0 CAR1073 = 1.55 mmol g-1。在活性炭 CAG 中，离子强度 (NaCl 0.1 M) 使水杨酸 (AcSc) 和对乙酰氨基酚 (ACE) 的吸附量 (Q) 分别降低了 54% 和 67%。热力学分析是通过浸入量热法在浓度为 6.6 × 10-2 和 7.2 mmol L-1 之间的水杨酸或对乙酰氨基酚溶液中进行的。浸没焓在-7.63 和-68.1 J g-1 之间。此外，确定了相互作用焓、吉布斯能量和熵变。