文献类型：期刊文献

英文题名：Efficient degradation of trichloroethylene in water using persulfate activated by reduced graphene oxide-iron nanocomposite

作者：Ahmad, Ayyaz[1];Gu, Xiaogang[1,2];Li, Li[1];Lv, Shuguang[2];Xu, Yisheng[1];Guo, Xuhong[1,3,4]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[3]Shihezi Univ, Key Lab Xinjiang Uygur Autonomous Reg, Xinjiang 832000, Peoples R China;[4]Shihezi Univ, Engn Res Ctr Xinjiang Bingtuan Mat Oriented Chem, Xinjiang 832000, Peoples R China

年份：2015

卷号：22

期号：22

起止页码：17876

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;EI(收录号：20242616344106);WOS:【SCI-EXPANDED(收录号:WOS:000365423100057)】；

基金：We acknowledge the financial support from the National Natural Science Foundation of China (nos. 51273063, 21476143, and 21306049), the Fundamental Research Funds for the Central Universities, the higher school specialized research fund for the doctoral program (222201313005 and 222201314029), 111 Project Grant (B08021), the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-14C01).

语种：英文

外文关键词：Reduced graphene oxide; Iron; Trichloroethylene degradation; Persulfate; Water treatment

摘要：Graphene oxide (GO) and nano-sized zero-valent iron-reduced graphene oxide (nZVI-rGO) composite were prepared. The GO and nZVI-rGO composite were characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR), energy-dispersive spectroscopy (EDS), and Raman spectroscopy. The size of nZVI was about 6 nm as observed by TEM. The system of nZVI-rGO and persulfate (PS) was used for the degradation of trichloroethylene (TCE) in water, and showed 26.5 % more efficiency as compared to nZVI/PS system. The different parameters were studied to determine the efficiency of nZVI-rGO to activate the PS system for the TCE degradation. By increasing the PS amount, TCE removal was also improved while no obvious effect was observed by varying the catalyst loading. Degradation was decreased as the TCE initial concentration was increased from 20 to 100 mg/L. Moreover, when initial solution pH was increased, efficiency deteriorated to 80 %. Bicarbonate showed more negative effect on TCE removal among the solution matrix. To better understand the effects of radical species in the system, the scavenger tests were performed. The center dot SO4- and center dot O-2(-) were predominant species responsible for TCE removal. The nZVI-rGO-activated PS process shows potential applications in remediation of highly toxic organic contaminants such as TCE present in the groundwater.