Department of Chemistry, Gaziosmanpasa University, 60250, Tokat, Turkey; King Fahd University of Petroleum and Minerals, Research Institute, Center for Environment and Water, Dhahran 31261, Saudi Arabia.
Department of Metallurgical and Material Engineering, Karadeniz Technical University, 61080, Trabzon, Turkey; Center of Research Excellence in Renewable Energy (CORERE), Research Institute, King Fahd University of Petroleum & Minerals (KFUPM), Saudi Arabia.
J Environ Manage. 2018 Jan 15;206:170-177. doi: 10.1016/j.jenvman.2017.10.016. Epub 2017 Dec 7.
The activated carbon (AC) was obtained from waste scrap tires and modified by bimetallic Fe and Ce nanoparticles in order to combine both the high surface area and the active sites for enhanced adsorption of the dye. The produced nanocomposite was used as a novel cost-effective magnetic in rhodamine B (RhB) removal from aqueous solutions. The FT-IR, SEM, EDX, TEM, and surface area analysis methods were implemented to characterize the morphological, chemical, thermal and surface properties of the developed adsorbent. The optimum batch experimental conditions were found under the response surface methodology. The adsorption equilibrium data were well fitted by the Langmuir isotherm model. The adsorption capacity was 324.6 mg g. The kinetic and thermodynamics studies were also carried out to understand the adsorption mechanism. The study indicated that RhB adsorption by the AC/Fe/Ce magnetic adsorbent has an endothermic character and followed the pseudo-second-order kinetics model. By using ethanol solution, RhB was desorbed at high efficiency and the prepared material could be recycled for up to ten cycles. Thus, the magnetic nanocomposite is an effective and promising adsorbent for the cleaning treatment of RhB ions from wastewater by a large scale designed adsorption system.
为了结合高表面积和活性位点，以增强对染料的吸附，我们从废轮胎中获得了活性炭（AC），并用双金属 Fe 和 Ce 纳米粒子对其进行了改性。所制备的纳米复合材料被用作一种新型的、经济高效的磁性材料，用于从水溶液中去除罗丹明 B（RhB）。采用 FT-IR、SEM、EDX、TEM 和比表面积分析方法对所开发的吸附剂的形态、化学、热和表面性能进行了表征。通过响应面法确定了最佳的批量实验条件。吸附平衡数据很好地符合朗缪尔等温模型。吸附容量为 324.6 mg/g。还进行了动力学和热力学研究以了解吸附机制。研究表明，AC/Fe/Ce 磁性吸附剂对 RhB 的吸附具有吸热特性，并遵循准二级动力学模型。通过使用乙醇溶液，可以高效地解吸 RhB，且制备的材料可以在多达十个循环中进行回收。因此，该磁性纳米复合材料是一种有效的、有前景的吸附剂，可通过大规模设计的吸附系统对废水中的 RhB 离子进行清洁处理。
