Preparation of a novel nano-Fe3O4/triethanolamine/GO composites to enhance Pb2+/Cu2+ ions removal
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In this paper, a magnetic nano-Fe3O4/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 Fe3O4 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 Fe3O4 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 Fe3O4 on TEA-GO-FE was 27.5 nm. In order to understand the adsorption properties of TEA-GO-FE for Pb2+ and Cu2+, 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 Pb2+ and Cu2+ were 121.5 mg/g and 68.7 mg/g, separately. Through thermodynamic as well as kinetic studies, the adsorption process of Pb2+ and Cu2+ on TEA-GO-FE is a self-heating process.
KeywordsMagnetic graphene oxide Fe3O4 Adsorption Triethanolamine Lead ions Copper ions
This research was supported by the National Natural Science Foundation of China (No.21776320), the Hunan Provincial Natural Science Foundation of China (No.2018JJ2484, No.2018JJ2489), the Open-End Fund for the Valuable and Precision Instruments of Central South University (No.CSUZC201827), and the Hunan Provincial Science and Technology Plan Project (No.2016TP1007).
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