铈氮改性水热炭活化过硫酸钾降解盐酸四环素
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作者单位:

1.重庆大学环境与生态学院;2.重庆市农业科学院农业工程研究所

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中图分类号:

X703

基金项目:

国家重点研发项目(2018YFD1100501);重庆市市级财政专项基础科研项目(NKY-2022AC004)。


Cerium-nitrogen modified hydrochar for efficient degradation of Tetracycline hydrochloride via potassium persulfate activation
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1.College of Environment and Ecology,Chongqing University;2.#$NBSInstitute of Agricultural Engineering,Chongqing Academy of Agricultural Sciences;3.China#$NBS

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    摘要:

    高级氧化技术(AOPs)在有机污染降解领域具有广泛应用,但仍存在催化耐久性差、原子利用率低等问题,阻碍了其活化性能的提升。本文以牛粪、双氰胺(C2H4N4)和六水硝酸铈(Ce(NO3)3·6H2O)为原料,通过微波水热法制备了具有高催化性能的铈氮改性水热炭(Ce-N-HTC),通过活化过硫酸钾降解盐酸四环素(Tetracycline hydrochloride,TCH)来评价该催化剂性能。其中,Ce0.3-N-HTC在pH为7.0条件下,盐酸四环素70 min内可降解90.32%,且碳酸氢根离子对TCH的降解率影响较大。竞争性自由基猝灭实验和电子顺磁共振测试(EPR)实验表明,该催化剂可通过自由基(·OH)和非自由基(1O2)两种途径实现四环素的降解。6次循环实验,TCH的降解率仍能保持在75%以上,表明制备的铈氮改性水热炭具有较好的稳定性和可回收性。

    Abstract:

    Advanced Oxidation Process is widely used in the field of organic pollution degradation, but some problems still exist such as poor catalytic durability and low atomic utilization, which hinder the improvement of its activation performance. In this paper, cerium nitrogen modified hydrochar(Ce-N-HTC) with high catalytic performance was prepared by microwave hydrothermal method from cow dung, urea (C2H4N4) and cerium nitrate hexahydrate (Ce (NO3) 3·6H2O). The performance of the catalyst was evaluated by activating potassium persulfate to degrade tetracycline hydrochloride (TCH). When pH is 7.0,Ce0.3-N-HTC can degrade TCH up to 90.32% in 70 minutes, and bicarbonate ion has a great influence on the degradation rate of TCH. Competitive radical quenching experiment and electron paramagnetic resonance (EPR) experiment showed that the catalyst could degrade tetracycline through radical (·OH) and Noradical (1O2). After 6 cycles of experiments, the degradation rate of TCH can still be maintained above 75%, indicating that the prepared Ce-N-HTC has good stability and recoverability.

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张凯,吉芳英.铈氮改性水热炭活化过硫酸钾降解盐酸四环素[J].精细化工,2023,40(2):

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历史
  • 收稿日期:2022-06-15
  • 最后修改日期:2022-08-29
  • 录用日期:2022-09-05
  • 在线发布日期: 2023-01-17
  • 出版日期: 2022-09-30