Department of Chemical Engineering, Annamalai University, Annamalai Nagar, 608002, Tamilnadu, India.
Department of Petroleum Engineering, JCT College of Engineering &Technology, Coimbatore, India.
Chemosphere. 2024 Jan;347:140696. doi: 10.1016/j.chemosphere.2023.140696. Epub 2023 Nov 15.
The presence of pharmaceutical compounds in aqueous environments has become a growing concern due to their potential adverse effects on ecosystems and human health. In this work, synthesis of a novel bio based nanocomposite using a biowaste, palm seed is employed for the preparation of biochar. The bio derived nanocomposite consist of polypyrrole (Ppy), graphene oxide (GO), and biochar, is employed for the Carbamazepine (CBZ) removal. The synthesized nanocomposite, Ppy-GO-Biochar, is characterized using various analytical techniques. The characterization results confirmed the successful synthesis of the Ppy-GO-Biochar nanocomposite with the desired morphology and structural properties. The effect of variables is investigated and the optimum conditions are found as: pH (7.8), adsorbent dosage (1.4 g/L), agitation speed (200 rpm) and temperature (39.5 °C). The results demonstrated that a removal efficiency of over 97.74% and uptake of 45.045 mg/g is achieved for CBZ. Furthermore, the CBZ removal followed pseudo-second-order, indicating chemisorption as the predominant mechanism. The CBZ sorption equilibrium is well represented by Langmuir and Freundlich isotherm. Thermodynamic results show that CBZ sorption is endothermic and spontaneous. Mechanism of CBZ sorption using the synthesized nanocomposite follows π-π interaction and electrostatic attraction. Molecular docking studies were also performed for the sorption of CBZ.
由于药物化合物在水环境中的存在对生态系统和人类健康可能产生不利影响，因此越来越受到关注。在这项工作中，使用生物废料棕榈籽合成了一种新型的生物基纳米复合材料，用于制备生物炭。生物衍生的纳米复合材料由聚吡咯（Ppy）、氧化石墨烯（GO）和生物炭组成，用于去除卡马西平（CBZ）。合成的纳米复合材料 Ppy-GO-Biochar 使用各种分析技术进行了表征。表征结果证实成功合成了具有所需形态和结构特性的 Ppy-GO-Biochar 纳米复合材料。研究了变量的影响，并找到了最佳条件为：pH（7.8）、吸附剂用量（1.4 g/L）、搅拌速度（200 rpm）和温度（39.5°C）。结果表明，CBZ 的去除效率超过 97.74%，吸附量为 45.045 mg/g。此外，CBZ 的去除遵循伪二级动力学，表明化学吸附是主要机制。CBZ 的吸附平衡很好地由 Langmuir 和 Freundlich 等温线表示。热力学结果表明，CBZ 的吸附是吸热和自发的。使用合成的纳米复合材料吸附 CBZ 的机制遵循 π-π 相互作用和静电吸引。还进行了 CBZ 吸附的分子对接研究。
