吉林大学学报(地球科学版) ›› 2020, Vol. 50 ›› Issue (4): 1173-1181.doi: 10.13278/j.cnki.jjuese.20190060

• 地质工程与环境工程 • 上一篇    

氮掺杂碳材料活化过硫酸盐降解4-氯苯酚

刘娜1,2, 张朋朋1,2, 丁隆真1,2, 陈红1,2, 焦昕倩1,2   

  1. 1. 吉林大学新能源与环境学院, 长春 130021;
    2. 地下水资源与环境教育部重点实验室(吉林大学), 长春 130021
  • 收稿日期:2019-03-26 发布日期:2020-07-29
  • 作者简介:刘娜(1977-),女,教授,博士生导师,主要从事环境污染治理与修复研究,E-mail:liuna@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(41572217)

Nitrogen-Doped Carbon Material Activate Persulfate to Degrade 4-Chlorophenol

Liu Na1,2, Zhang Pengpeng1,2, Ding Longzhen1,2, Chen Hong1,2, Jiao Xinqian1,2   

  1. 1. College of New Energy and Environment, Jilin University, Changchun 130021, China;
    2. Key Laboratory of Groundwater Resources and Environment(Jilin University), Ministry of Education, Changchun 130021, China
  • Received:2019-03-26 Published:2020-07-29
  • Supported by:
    Supported by National Natural Science Foundation of China (41572217)

摘要: 为了进一步研究氮掺杂碳材料活化过硫酸盐降解4-氯苯酚的方法,首先以廉价易得的废弃工业糖浆作为碳源,以氨水作为氮源,利用溶胶-凝胶法合成了3种氮掺杂碳材料(NC-700,NC-800和NC-900),并利用扫描电子显微镜(SEM)、X射线衍射(XRD)、拉曼光谱(Raman)、X射线光电子能谱(XPS)等技术对氮掺杂碳材料进行表征分析;然后考察了NC-800投加量、过硫酸盐(PDS)投加量和初始pH等因素对4-氯苯酚去除率的影响,并进行了电子自旋共振(ESR)和自由基淬灭实验。结果表明:3种材料均可有效活化PDS降解4-氯苯酚,其中NC-800活化PDS去除4-氯苯酚效率最高;当NC-800投加量为100 mg/L、PDS投加量为5 mmol/L时,反应30 min后,50 mg/L的4-氯苯酚的总去除率达99.10%;初始pH对4-氯苯酚去除率无明显影响;NC-800活化过硫酸盐降解4-氯苯酚遵循非自由基途径,单线态氧为降解4-氯苯酚的活性物质。循环使用实验证明NC-800具有一定的稳定性,4次循环使用后,4-氯苯酚去除率仍可达到73.80%。

关键词: 氮掺杂碳材料, 4-氯苯酚, 过硫酸盐, 非自由基途径, 单线态氧

Abstract: This thesis focuses on the activation of persulfate to degrade 4-chlorophenol by self-developed nitrogen-doped carbon materials. Firstly, three nitrogen doped carbon materials (NCs) (NC-700, NC-800, and NC-900) were synthesized via sol-gel method by using waste industrial syrup as carbon source and ammonia as nitrogen source, which were characterized by the methods of scanning electron microscope(SEM), X-ray diffraction(XRD), Raman spectra(Raman), and X-ray photoelectron spectroscopy(XPS). Then, the effects of NC-800 dosage, persulfate (PDS) dosage,and initial pH on the removal rate of 4-chlorophenol were investigated, and electron spin resonance (ESR) and free radical quenching experiments were carried out. It showed that all the three NCs could effectively activate persulfate (PDS) to degrade 4-chlorophenol; and NC-800 showed the best ctivation performance; the removal efficiency of 50 mg/L 4-chlorophenol reached 99.10 % in 30 min, when the dosage of NC-800 and PDS were 100 mg/L and 5 mmol/L, respectively; the initial pH had no effects on the removal efficiency of 4-chlorophenol; NC-800 activated persulfate degradation of 4-chlorophenol,which followed the non-radical pathway, and the singlet oxygen was the active substance for degrading of 4-chlorophenol. The cycling experiments showed that NC-800 has certain stability, and the removal efficiency could still reach to 73.80 % after four cycles.

Key words: nitrogen doped carbon materials, 4-chlorophenol, persulfate, non-radical pathway, singlet oxyge

中图分类号: 

  • X703
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