高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (8): 1836-1842.doi: 10.7503/cjcu20200198

• 物理化学 • 上一篇    下一篇

还原氧化石墨烯负载零价铁的合成及对TNT废水处理

陈砚田, 郄晗彤, 张胤杰, 周彩吉, 谭笑, 林爱军   

  1. 北京化工大学环境科学与工程系, 北京市环境污染控制与资源化工程研究中心, 北京 100029
  • 收稿日期:2020-04-13 出版日期:2020-08-10 发布日期:2020-07-31
  • 通讯作者: 林爱军,男,博士,教授,主要从事环境修复材料研究.E-mail:linaj@mail.buct.edu.cn E-mail:linaj@mail.buct.edu.cn
  • 基金资助:
    国家自然科学基金(批准号:41877133)和大学生创新创业训练计划项目(批准号:201910010032)资助.

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).

摘要: 选取比表面积大且导电性能优良的还原氧化石墨烯(rGO)作为支撑材料,负载还原性强但极易团聚的纳米零价铁(nZVI),制得还原氧化石墨烯负载零价铁(nZVI/rGO)复合材料.通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)与X射线光电子能谱(XPS)等测试手段对零价铁的负载情况、材料表面微观形貌与反应前后nZVI/rGO材料表面铁元素的含量与组成进行表征.考察了溶液初始pH值、材料投加量和理论零价铁负载量等因素对nZVI/rGO去除2,4,6-三硝基甲苯(TNT)的影响,研究了nZVI/rGO材料去除TNT的反应机理.通过正交实验可知,nZVI/rGO对含TNT废水的处理在较宽的反应条件范围内都可达到处理要求,在理论零价铁的负载量为3.0 g/g rGO,溶液初始pH为6,材料投加量为40 g/L时效果最佳,可将废水中TNT处理到检出限0.1 mg/L以下.

关键词: 纳米零价铁, 还原氧化石墨烯, 2,4,6-三硝基甲苯, 硝基还原

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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