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首页> 外文期刊>Journal of Hazardous Materials >Molecular insights into the effects of pyrolysis temperature on composition and copper binding properties of biochar-derived dissolved organic matter
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Molecular insights into the effects of pyrolysis temperature on composition and copper binding properties of biochar-derived dissolved organic matter

机译：热解温度对生物炭衍生溶解有机物质组成和铜结合性能的分子见解

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摘要

Biochar-derived dissolved organic matter (BDOM), which has a substantial impact on the environmental behavior of heavy metals, is critical for understanding the environmental efficacy of biochar. Here, we used a suite of advanced spectroscopic and mass spectroscopic methods to investigate the relationship among the pyrolysis temperature of biochar, composition of BDOM, and interactions of BDOM with Cu. The binding affinity of BDOM and Cu showed incredibly increase, with the increasing pyrolysis temperature (300-500 degrees C) which promoted the release of condensed aromatic compounds and oxygen-containing functional groups from biochar into dissolved phase. A notable difference in the sequences binding with Cu was occurred during the changing pyrolysis temperature. The amide only involved in the binding process between Cu and BDOM at low-temperature (300 and 400 degrees C), whereas phenolic only associated with the such binding process at high-temperature (500 degrees C). Apart from this, the carboxyl and polysaccharides took part in the binding process of Cu with BDOM, no matter how higher the temperature is. A further analysis by X-ray absorption spectroscopy revealed that bidentate carboxylic-Cu complexes appear to be the predominant binding pattern for Cu to BDOM. Our results might contribute to provide novel information for the environment applications of biochar.
机译：生物炭衍生的溶解有机物（BDom）对重金属的环境行为具有显着影响，对于了解生物炭的环境疗效至关重要。在这里，我们使用了一套先进的光谱和质谱方法，以研究生物炭的热解温度，BDom成分的关系，以及Bdd与Cu的相互作用。 BDom和Cu的结合亲和力表现出令人难以置信的增加，随着热解温度（300-500℃）的增加，该热解温度（300-500℃）促进从生物炭释放到溶解的相中。在变化的热解温期间发生与Cu结合的序列中的显着差异。仅在低温（300和400℃）的Cu和Bdom之间仅参与Cu和Bdom之间的结合过程，而酚醛酚仅在高温（500℃）下的结合过程中。除此之外，羧基和多糖在Cu与BDD中取出了Cu的结合过程，无论温度如何越高。 X射线吸收光谱的进一步分析显示，双齿羧酸-Cu复合物似乎是Cu至BDom的主要结合模式。我们的结果可能有助于为生物炭的环境应用提供新颖的信息。

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  • 来源
    《Journal of Hazardous Materials》 |2021年第15期|124537.1-124537.10|共10页
  • 作者

    Huang Mei; Li Zhongwu; Wen Jiajun; Ding Xiang; Zhou Mi; Cai Changqing; Shen Fei;

  • 作者单位

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Hunan Peoples R China|Hunan Univ Minist Educ Key Lab Environm Biol & Pollut Control Changsha 410082 Hunan Peoples R China|Sichuan Agr Univ Inst Ecol & Environm Sci Chengdu 611130 Sichuan Peoples R China|Sichuan Agr Univ Rural Environm Protect Engn & Technol Ctr Sichuan Chengdu 611130 Sichuan Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Hunan Peoples R China|Hunan Univ Minist Educ Key Lab Environm Biol & Pollut Control Changsha 410082 Hunan Peoples R China|Hunan Normal Univ Coll Resources & Environm Sci Changsha 410081 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Hunan Peoples R China|Hunan Univ Minist Educ Key Lab Environm Biol & Pollut Control Changsha 410082 Hunan Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Hunan Peoples R China|Hunan Univ Minist Educ Key Lab Environm Biol & Pollut Control Changsha 410082 Hunan Peoples R China;

    Hunan Normal Univ Coll Resources & Environm Sci Changsha 410081 Peoples R China;

    Hunan Univ Coll Environm Sci & Engn Changsha 410082 Hunan Peoples R China|Hunan Univ Minist Educ Key Lab Environm Biol & Pollut Control Changsha 410082 Hunan Peoples R China;

    Sichuan Agr Univ Inst Ecol & Environm Sci Chengdu 611130 Sichuan Peoples R China|Sichuan Agr Univ Rural Environm Protect Engn & Technol Ctr Sichuan Chengdu 611130 Sichuan 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biochar; Dissolved organic matter; Pyrolysis temperature; Fourier transform ion cyclotron resonance mass spectrometry; X-ray absorption fine structure;

    机译：生物炭;溶解有机物;热解温;傅里叶变换离子回旋谐振质谱;X射线吸收细结构;

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