Atenolol is a β-blocker considered to be an emerging contaminant due to its potential risk to aquatic ecosystems and human health. The removal of atenolol from water was studied using pumice stone, an amorphous, porous, and low-cost adsorbent. The adsorption process was evaluated in ultrapure water by kinetic, pH, and isotherm batch assays; the matrix effect of wastewater and desorption using ultrapure water were evaluated as well. The adsorption of atenolol in pumice stone adjusted to the pseudo-second-order kinetic model showed fast adsorption in the first 2 h and reached final equilibrium after 48 h. The highest removal in ultrapure water was at pH 7.0. The maximum experimental adsorption capacity obtained for ultrapure water and actual wastewater ranged from 0.632 to 0.154 mg/g, respectively. The equilibrium adsorption experiments showed S-shaped isotherms following the Freundlich model and an increase in adsorption capacity as equilibrium concentration increased. Desorption was up to 55%, demonstrating the potential regeneration of the adsorbent, even on site, using ultrapure water. Furthermore, the results for atenolol, a cationic substance (pKa 9.6), suggest the application of negatively charged pumice as an adsorbent for similar substances of concern.

阿替洛尔是一种 β 受体阻滞剂，被认为是一种新兴污染物，因为它对水生生态系统和人类健康有潜在风险。使用浮石（一种无定形、多孔且低成本的吸附剂）研究从水中去除阿替洛尔。通过动力学、pH 值和等温线批次分析在超纯水中评估吸附过程；废水的基质效应和使用超纯水的解吸也进行了评估。调整为准二级动力学模型的浮石中阿替洛尔的吸附在前 2 h 显示快速吸附，并在 48 h 后达到最终平衡。在 pH 7.0 时，超纯水中的去除率最高。超纯水和实际废水的最大实验吸附容量分别为 0.632 至 0.154 mg/g。平衡吸附实验显示遵循 Freundlich 模型的 S 形等温线和吸附容量随着平衡浓度增加而增加。解吸率高达 55%，表明即使在现场，使用超纯水也有可能对吸附剂进行再生。此外，阳离子物质阿替洛尔 (pKa 9.6) 的结果表明，可使用带负电荷的浮石作为类似关注物质的吸附剂。