Li Ting, Zhang Chao-Zhi, Gu Chengyue
a School of Environmental Science and Engineering , Nanjing University of Information Science and Technology , Nanjing , People's Republic of China.
b Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control , Nanjing University of Information Science and Technology , Nanjing , People's Republic of China.
Environ Technol. 2017 Dec;38(23):2999-3006. doi: 10.1080/09593330.2017.1285357. Epub 2017 Feb 13.
With popular application of graphene and graphene oxide (GO), they have been discharged into water. Graphene and GO harm organisms. However, an efficient and economical method for removing graphene and GO in wastewater has seldom been reported. Graphene can be oxidized by hydrogen peroxide to give GO; therefore, degradation of graphene oxide is an important step in the procedure of removal of graphene from water. In this paper, GO degradation via photo-Fenton reaction under different conditions was carried out. Experimental results suggested that GO in wastewater can be efficiently and economically degraded into carbon dioxide and HO when pH value is 3, concentration of HO and FeCl are 35 mM and 5 ppm, respectively. Degradation mechanism of GO was suggested based on UV-vis absorption spectra, scanning electron microscopy, X-ray diffraction and liquid chromatography-mass spectra data of degradation intermediates. This paper suggests an efficient and economical degradation way of GO in wastewater.
随着石墨烯和氧化石墨烯（GO）的广泛应用，它们已被排放到水中。石墨烯和氧化石墨烯会对生物体造成危害。然而，一种高效且经济的去除废水中石墨烯和氧化石墨烯的方法鲜有报道。石墨烯可被过氧化氢氧化生成氧化石墨烯；因此，氧化石墨烯的降解是从水中去除石墨烯过程中的重要一步。本文在不同条件下通过光芬顿反应对氧化石墨烯进行了降解。实验结果表明，当pH值为3、过氧化氢浓度和氯化铁浓度分别为35 mM和5 ppm时，废水中的氧化石墨烯可被高效且经济地降解为二氧化碳和羟基自由基（HO·）。基于氧化石墨烯降解中间体的紫外可见吸收光谱、扫描电子显微镜、X射线衍射和液相色谱 - 质谱数据，提出了氧化石墨烯的降解机理。本文提出了一种高效且经济的降解废水中氧化石墨烯的方法。
