首页> 外文期刊>Environmental Engineering Science >Synthesis of Microscale Zinc–Copper Bimetallic Particles and Their Performance Toward p-Nitrophenol Removal: Characterization, Mineralization, and Response Surface Methodology
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Synthesis of Microscale Zinc–Copper Bimetallic Particles and Their Performance Toward p-Nitrophenol Removal: Characterization, Mineralization, and Response Surface Methodology

机译:微米级锌铜双金属颗粒的合成及其对对硝基苯酚的去除性能:表征,矿化和响应面方法

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摘要

In this study, microscale zinc-copper (mZn/Cu) bimetallic particles were prepared through precipitating Cu on the surface of Zn and applied in the degradation of p-nitrophenol (PNP). To optimize reaction conditions, three control parameters, including reciprocating speed, mZn/Cu dosage, and PNP concentration, were investigated by the central composite rotatable design coupling with response surface methodology. To further evaluate the catalytic activity of mZn/Cu, the removal of PNP and total organic carbon (TOC) were compared in different systems. It is found that the removal of TOC by mZn/Cu, mFe/Cu, mZn, mFe, mCu, and mZn + mCu was 77%, 41%, 5%, 7%, 19%, and 9%, respectively. The maximum mineralizing of PNP was realized in the system of mZn/Cu/PNP, suggesting that PNP mainly underwent oxidative degradation. Furthermore, these results also indicate that PNP was basically reduced in the presence of mZn, mFe, and mZn + mCu. The mechanism investigations via florescence spectroscopy and free radical scavengers reveal that (OH)-O-center dot generated from Fenton-like reaction was responsible for the decomposition of PNP by mZn/Cu. Based on the analyses of intermediates detected by liquid chromatography-mass spectrometry, the possible degradation pathways of PNP are proposed. In summary, mZn/Cu bimetallic particles are a potential approach to degrade PNP under aerobic condition.
机译:在这项研究中,通过在锌表面上沉淀铜制备了微米级锌铜(mZn / Cu)双金属颗粒,并将其用于对硝基苯酚(PNP)的降解。为了优化反应条件,通过中心复合可旋转设计与响应面方法相结合,研究了三个控制参数,包括往复速度,mZn / Cu剂量和PNP浓度。为了进一步评估mZn / Cu的催化活性,在不同系统中比较了PNP和总有机碳(TOC)的去除。发现用mZn / Cu,mFe / Cu,mZn,mFe,mCu和mZn + mCu去除TOC分别为77%,41%,5%,7%,19%和9%。在mZn / Cu / PNP体系中实现了PNP的最大矿化,表明PNP主要经历了氧化降解。此外,这些结果还表明,在存在mZn,mFe和mZn + mCu的情况下,PNP基本上被还原。通过荧光光谱和自由基清除剂的机理研究表明,由Fenton样反应生成的(OH)-O-中心点是mZn / Cu分解PNP的原因。在分析液相色谱-质谱法检测中间体的基础上,提出了PNP可能的降解途径。总之,mZn / Cu双金属颗粒是有氧条件下降解PNP的潜在方法。

著录项

  • 来源
    《Environmental Engineering Science》 |2020年第4期|263-271|共9页
  • 作者

  • 作者单位

    Nanjing Agr Univ Coll Resources & Environm Sci Nanjing Peoples R China|China Tobacco Jiangsu Ind Co Ltd Nanjing Peoples R China;

    China Tobacco Jiangsu Ind Co Ltd Nanjing Peoples R China;

    Nanjing Agr Univ Coll Sci Nanjing 210095 Peoples R China;

    Nanjing Agr Univ Coll Resources & Environm Sci Nanjing Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mechanism; microscale zinc-copper bimetallic particles; p-nitrophenol; response surface methodology;

    机译:机制;微米级锌铜双金属颗粒;对硝基苯酚;响应面方法;
  • 入库时间 2022-08-18 05:18:00

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