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

doi:10.7503/cjcu20200198

Abstract

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

CLC Number:

O647

TrendMD:

CHEN Yantian, QIE Hantong, ZHANG Yinjie, ZHOU Caiji, TAN Xiao, LIN Aijun. Synthesis of Reduced Graphene Oxide Supported Zero-valent Iron and Its Treatment of TNT Wastewater[J]. Chem. J. Chinese Universities, 2020, 41(8): 1836.

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