Chemical Engineering Department, Federal University of Santa Maria - UFSM, 1000 Roraima Avenue, 97105-900, Santa Maria, RS, Brazil.
Universidad de La Costa, Department of Civil and Environmental Engineering, Barranquilla, Colombia.
Chemosphere. 2021 Jan;262:128322. doi: 10.1016/j.chemosphere.2020.128322. Epub 2020 Sep 15.
The presence of emerging contaminants such as pharmaceuticals in aquatic means presents as a serious threat, since their real consequences for the environment and human health are not well known. Therefore, this work consisted of preparing and characterize sludge-derived activated carbons (beverage sludge activated carbon - BSAC and acid-treated beverage sludge activated carbon - ABSAC) to investigate their use in the pharmaceuticals adsorption in aqueous media. The morphology study has demonstrated that ABSAC, unlike BSAC, exhibited an abundant porous structure, with smaller particles and bigger roughness. Adsorption results indicated that the ABSAC was more effective that BSAC, since it presented superior surface area (642 m g) and total pore volume (0.485 cm g) values. Pseudo-second-order kinetic model was more suitable to predict experimental data. Sips model best described the equilibrium data, with maximum adsorption capacities of 145, 105, and 57 mg g for paracetamol, ibuprofen, and ketoprofen, respectively. Besides, the sludge-derived adsorbent was highly efficient in the treatment of a simulated drug effluent, removing 85.16% of the pharmaceutical compounds. Therefore, the material prepared in this work possesses intrinsic characteristics that make it a remarkable adsorbent to be applied in the treatment of pharmaceutical contaminants contained in industrial wastewater.
新兴污染物（如药品）在水生环境中的存在构成了严重威胁，因为它们对环境和人类健康的实际影响尚未得到充分认识。因此，本工作包括制备和表征污泥衍生的活性炭（饮料污泥活性炭-BSAC 和酸处理饮料污泥活性炭-ABSAC），以研究其在水中吸附药物的应用。形态研究表明，与 BSAC 不同，ABSAC 表现出丰富的多孔结构，具有更小的颗粒和更大的粗糙度。吸附结果表明，ABSAC 比 BSAC 更有效，因为它具有更高的比表面积（642 m g）和总孔体积（0.485 cm g）。准二级动力学模型更适合预测实验数据。Sips 模型更好地描述了平衡数据，对于扑热息痛、布洛芬和酮洛芬，最大吸附容量分别为 145、105 和 57 mg g。此外，该污泥衍生的吸附剂在处理模拟药物废水时非常有效，可去除 85.16%的药物化合物。因此，本工作中制备的材料具有内在特性，使其成为一种应用于处理工业废水中所含药物污染物的显著吸附剂。
