One-pot preparation of graphene oxide magnetic nanocomposites for the removal of tetrabromobisphenol A

• Published in: Frontiers of environmental science & engineering 2013, Vol.7 (3), p.442-450
• Main Authors: Ji, Liqin, Bai, Xue, Zhou, Lincheng, Shi, Hanchang, Chen, Wei, Hua, Zulin
• Format: Article
• Language: English
• Subjects: adsorbents; Adsorption; Aqueous solutions; Earth and Environmental Science; Electrons; Environment; Graphene; graphene oxide (GO); Iron oxides; Langmuir模型; Magnetic; Magnetic fields; Magnetite; Nanocomposites; Nanoparticles; Research Article; Sodium hydroxide; sorption isotherms; temperature; Tetrabromobisphenol A; tetrabromobisphenol A (TBBPA); thermodynamics; Transmission electron microscopy; wastewater; Wastewater treatment; 制备; 四溴双酚A; 氢氧化钠溶液; 氧化石墨; 磁性纳米粒子; 纳米复合材料; 透射电子显微镜
• ISSN: 2095-2201; 2095-221X
• DOI: 10.1007/s11783-013-0515-2

A simple solvothermal method was used to prepare monodisperse magnetite （Fe304） nanoparticles attached onto graphene oxide （GO） sheets as adsorbents to remove tetrabromobisphenol A （TBBPA） from an aqueous solution. These Fe304/GO （MGO） nanocomposites were characterized by transmission electron microscopy. The adsorption capacity at different initial pH, contact duration, and temperature were evaluated. The kinetics of adsorption was found to fit the pseudo-second-order model perfectly. The adsorption isotherm well fitted the Langmuir model, and the theoretical maximum of adsorption capacity calculated by the Langmuir model was 27.26 mg ·g^-1 The adsorption thermodynamics of TBBPA on the MGO nanocomposites was determined at 303K, 313K, and 323 K, respectively. The results indicated that the adsorp- tion was spontaneous and endothermic. The MGO nanocomposites were conveniently separated from the media by an extemal magnetic field within several seconds, and then regenerated in 0.2 M NaOH solution. Thus, the MGO nanocomposites are a promising candidate for TBBPA removal from wastewater.