Department of Food Science & Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Department of Microbial and Molecular Systems, Faculty of Bioscience Engineering, KU Leuven, Kasteelpark Arenberg 20, Box 2300, 13, B3001, Leuven, Belgium.
Environ Res. 2022 Nov;214(Pt 2):113831. doi: 10.1016/j.envres.2022.113831. Epub 2022 Jul 14.
The current study presents a viable and straightforward method for synthesizing titanium lanthanum three oxide nanoparticles (TiLa) and their decoration onto the ferrous graphene oxide sheets to produce FeGO-TiLa as efficient magnetic adsorbent. Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and vibration sample magnetometer (VSM) were used to evaluate the physical and chemical properties of the produced nanocomposites. The FeGO-TiLa was used to enhance the removal of lead ions from aqueous solution. The FeGO-TiLa nanocomposite exhibited a much higher removal efficiency (93%) for lead ions than pure TiLa nanoparticles (81%) and magnetic graphene oxide (74%). The influence of FeGO-TiLa dosage, contact time, solution pH, solution temperature, and starting quantity on the lead ions was evaluated and adjusted. The investigations demonstrated that a pH 6 with 40 mg adsorbent resulted in >91% removal of lead ions at ambient temperature after 120 min. Isotherm models were used to analyze experimental results, and Langmuir model fitted the data well as compared Freundlich model with a maximum adsorption capacity of 109.89 mg g. Kinetic and studies are performed the lead adsorption over FeGO-TiLa follow pseudo-second-order rate. Langmuir and Free energy suggested the lead ions uptake with FeGO-TiLa was monolayer and physical adsorption mechnaism, respectively. Finally, the FeGO-TiLa nanocompoiste can be used as an alternative adsorbent for water remediation.
当前的研究提出了一种可行且简单的方法来合成钛镧三氧化物纳米粒子（TiLa），并将其修饰到亚铁氧化石墨烯片上，以制备高效的磁性吸附剂 FeGO-TiLa。傅里叶变换红外光谱（FT-IR）、扫描电子显微镜（SEM）、能谱（EDX）和振动样品磁强计（VSM）用于评估所制备纳米复合材料的物理和化学性质。使用 FeGO-TiLa 来增强从水溶液中去除铅离子。与纯 TiLa 纳米粒子（81%）和磁性氧化石墨烯（74%）相比，FeGO-TiLa 纳米复合材料对铅离子的去除效率（93%）更高。评估和调整了 FeGO-TiLa 用量、接触时间、溶液 pH 值、溶液温度和起始数量对铅离子的影响。研究表明，在环境温度下，在 40mg 吸附剂和 pH 6 的条件下，120min 后铅离子的去除率>91%。等温线模型用于分析实验结果，与 Freundlich 模型相比，Langmuir 模型更适合拟合数据，最大吸附容量为 109.89mg/g。动力学研究表明，FeGO-TiLa 对铅的吸附遵循准二级速率。Langmuir 和自由能表明，FeGO-TiLa 对铅离子的摄取是单层的，吸附机制是物理吸附。最后，FeGO-TiLa 纳米复合材料可用作水修复的替代吸附剂。
