Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (8): 1836.doi: 10.7503/cjcu20200198

• Physical Chemistry • Previous Articles     Next Articles

Synthesis of Reduced Graphene Oxide Supported Zero-valent Iron and Its Treatment of TNT Wastewater

CHEN Yantian, QIE Hantong, ZHANG Yinjie, ZHOU Caiji, TAN Xiao, LIN Aijun   

  1. Department of Environmental Science and Engineering, Beijing Environmental Pollution Control and Resource Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2020-04-13 Online:2020-08-10 Published:2020-07-31
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.41877133) and the National Undergraduate Training Program for Innovation and Entrepreneurship, China(No.201910010032).

Abstract: Nano-zero valent iron(nZVI) loaded onto graphene oxide(GO) as a composite material(nZVI/rGO) was prepared to remove 2,4,6-trinitrotoluene(TNT). The nZVI/rGO was characterized by means of scanning transmission electron microscopy(SEM), Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), and X-ray photoelectron spectroscopy(XPS). Batch experiments with variable theoretical nZVI mass loading, pH values and material dosage were conducted to evaluate the removal performance of nZVI/rGO. The results showed that nZVI/rGO is very effective in removing TNT. Furthermore, nZVI/rGO shows good removal capability within a wide range of reaction conditions. Through the experiment, it also concluded that the TNT can be removed below the detection limit of 0.1 mg/L under the optimal treatment conditions of pH=6, theoretical nZVI mass loading of 3 g/g rGO, composite material dosage of 40 g/L. In addition, nZVI/rGO could overcome the shortcomings of nZVI which formed undesirable precipitation in the reaction frequently. These findings shed new light on TNT removing in the water environment.

Key words: Nanoscale zero-valent iron, Graphene oxide, 2,4,6-Trinitrotoluene(TNT), Nitro reduction

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