Abstract
A hydroxyl-functionalized magnetic fungus nanocomposite (MFH@GO) was prepared by a simple one-pot method for the removal of Cr(VI) from wastewater. The adsorption behavior of MFH@GO to Cr(VI) in wastewater was discussed in detail. At pH of 5.0 and temperature of 323.15 K, MFH@GO had higher adsorption capacity to Cr(VI) (58.4 mg/g) than the unmodified fungus and GO. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetry and differential thermal analysis (TG-DTA), scanning electron microscopy and energy dispersive X-Ray spectroscopy (SEM-EDX) were employed to determine the characteristics of MFH@GO. Results showed that magnetic graphene oxide nanoparticles significantly enhanced the physiochemical properties of the fungi. In addition, the adsorption mechanisms analyses show that Cr(VI) could be reduced and mineralized into ferric chromate in residues. These results suggested that MFH@GO could be used as an promising and alternative biosorbent for removal of Cr(VI) from industrial wastewater.
摘要
本文采用一种简单、 温和的方法制备了富含功能基团的磁性菌丝复合材料 MFH@GO, 并用于处理废水中的 Cr(VI). 详细地研究了 MFH@GO 对 Cr(VI) 的吸附性能. 结果表明, 在 pH 值为 5.0, 温度为 323.15 K 的条件下, MFH@GO 对 Cr(VI) 的最大吸附量达到 58.4 mg/g, 远高于未改性的菌丝粉和氧化石墨烯. 通过 FTIR, XRD, TG-DTA, SEM 和 EDX 等分析 MFH@GO 的特性及对 Cr(VI)的吸附机理, 结果表明, 铁及氧化石墨烯纳米颗粒显著改善了菌丝的理化特性, MFH@GO 能够将 Cr(VI) 还原成无毒的铬酸铁化合物存在于残留物中. 该研究结果表明 MFH@GO 在处理Cr(VI)废水中具有较大的潜力和应用价值.
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Foundation item: Project(18B195) supported by Excellent Youth Project of Hunan Education Department, China; Projects(51804353, 51704093) supported by the National Natural Science Foundation of China; Project(kq1801074) supported by Key Projects of Changsha Science and Technology Plan, China; Project(2018JJ4010) supported by Hunan Provincial Natural Science Foundation of China (Joint Funds of Provincial and Zhuzhou Municipal); Project(2018JJ3885) supported by Natural Science Foundation of Hunan Province of China (Science Foundation for Youths)
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Chen, Rh., Cheng, Yy., Wang, P. et al. High efficient removal and mineralization of Cr(VI) from water by functionalized magnetic fungus nanocomposites. J. Cent. South Univ. 27, 1503–1514 (2020). https://doi.org/10.1007/s11771-020-4386-y
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DOI: https://doi.org/10.1007/s11771-020-4386-y