College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha, 410083, Hunan, China.
Environ Sci Pollut Res Int. 2019 Apr;26(10):10174-10187. doi: 10.1007/s11356-019-04316-w. Epub 2019 Feb 13.
In this paper, a magnetic nano-FeO/triethanolamine/GO composite (TEA-GO-FE) was prepared by using graphene oxide (GO), triethanolamine (TEA), and ferric chloride. The result indicates that triethanolamine acted as an important role for the growing of FeO and adsorption ability of composite material. The synthesis mechanism of TEA-GO-FE was investigated through the medium of SEM-EDS, XRD, FT-IR, and TEM. The characterization results indicated FeO nanoparticles have been successfully loaded on the surface of graphene oxide and they were encapsulated by TEA and have excellent stability. According to the results of XRD, the general particle size of FeO on TEA-GO-FE was 27.5 nm. In order to understand the adsorption properties of TEA-GO-FE for Pb and Cu, this article uses a static adsorption study method. The optimized adsorption conditions are as follows: pH = 5.0, temperature is 293.15 K, and the ion concentration is 100 mg/L. Under the optimized prerequisites, the adsorption capacities of Pb and Cu were 121.5 mg/g and 68.7 mg/g, separately. Through thermodynamic as well as kinetic studies, the adsorption process of Pb and Cu on TEA-GO-FE is a self-heating process.
本文采用氧化石墨烯（GO）、三乙醇胺（TEA）和氯化铁制备了磁性纳米 FeO/三乙醇胺/GO 复合材料（TEA-GO-FE）。结果表明，三乙醇胺对 FeO 的生长和复合材料的吸附能力起着重要作用。通过 SEM-EDS、XRD、FT-IR 和 TEM 等手段研究了 TEA-GO-FE 的合成机制。表征结果表明，FeO 纳米颗粒已成功负载在氧化石墨烯表面，并被 TEA 包裹，具有优异的稳定性。根据 XRD 的结果，TEA-GO-FE 上 FeO 的平均粒径为 27.5nm。为了了解 TEA-GO-FE 对 Pb 和 Cu 的吸附性能，本文采用静态吸附研究方法。优化的吸附条件如下：pH=5.0，温度为 293.15K，离子浓度为 100mg/L。在优化的前提条件下，Pb 和 Cu 的吸附容量分别为 121.5mg/g 和 68.7mg/g。通过热力学和动力学研究，Pb 和 Cu 在 TEA-GO-FE 上的吸附过程是一个自加热过程。
