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首页> 外文期刊>Journal of Analytical & Applied Pyrolysis >Effect of clay and iron sulphate on volatile and water-extractable organic compounds in bamboo biochars
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Effect of clay and iron sulphate on volatile and water-extractable organic compounds in bamboo biochars

机译：粘土和硫酸铁对竹炭中挥发性和水可萃取有机化合物的影响

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摘要

Improved plant disease resistance, seed germination and plant productivity have recently been associated with mineral-enhanced biochars. This has generated interest in characterizing those biochar organic compounds which may contribute to their favorable properties. This study builds on recent physico-chemical characterization of a series of mineral-enhanced bamboo biochars produced between 350 and 550 degrees C. Here, these biochars are subjected to aqueous extraction followed by liquid chromatography organic carbon detection (LC-OCD) and thermal desorption gas chromatography mass spectrometry (TD-GC/MS). These techniques provide a structural insight into their more bio-available organic compounds and how they vary with pyrolysis temperature. In comparison to neat biochar, their mineral-enhanced composites produce at least three times the water-extractable organic carbon, nitrogen and VOCs, and this increase is further amplified at pyrolysis higher temperatures. However, the biochar carbon fraction that is mobile is low, with total TD-GC/MS compatible VOCs reporting approximately 0.2% and LC-OCD solubles approximately 1-2%. Prior mineral impregnation of bamboo enhances the release of oxygenated compounds including humics and phenolics from its biochars. This increase in mobile oxygenates occurs at higher pyrolysis temperatures despite these minerals catalyzing fignocellulose condensation and carbonization. This anomaly is explained by oxygenates relatively small contribution and the self inerting batch pyrolysis conditions producing different biochar surface and bulk molecular properties. By describing the impact of mineral amendments on the yield and structure of mobile organic compounds that may be released from biochar, this work contributes to our understanding of biochar efficacy in soils.
机译：最近，提高植物的抗病性，种子发芽和植物生产力与矿物增强生物炭有关。这引起了人们对表征可能有助于其有利性能的生物炭有机化合物的兴趣。这项研究基于最近在350到550摄氏度之间产生的一系列矿物增强的竹生物炭的理化特性。这里，对这些生物炭进行水提取，然后进行液相色谱有机碳检测（LC-OCD）和热脱附气相色谱质谱法（TD-GC / MS）。这些技术为他们提供了更多可生物利用的有机化合物，以及它们如何随热解温度变化提供结构上的见识。与纯生物炭相比，它们的矿物增强复合物产生的水至少是可水萃取的有机碳，氮和VOC的三倍，并且这种增加在高温下热解时会进一步放大。但是，可移动的生物炭碳含量较低，总TD-GC / MS兼容的VOC报告约为0.2％，LC-OCD可溶物约为1-2％。事先对竹子进行矿物浸渍可增强其生物炭中含氧化合物（包括腐殖质和酚类）的释放。尽管这些矿物质催化纤维素纤维素的缩合和碳化，但在较高的热解温度下，这种可移动的含氧化合物的增加仍会发生。这种异常现象可以用含氧化合物相对较小的贡献以及产生不同生物炭表面和本体分子特性的自惰性间歇热解条件来解释。通过描述矿物质改良剂对可能从生物炭释放的移动性有机化合物的产量和结构的影响，这项工作有助于我们了解土壤中生物炭的功效。

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  • 来源
    《Journal of Analytical & Applied Pyrolysis》 |2018年第8期|22-29|共8页
  • 作者

    Reynolds Alicia; Joseph Stephen D.; Verheyen T. Vincent; Chinu Khorshed; Taherymoosavi Sarasadat; Munroe Paul R.; Donne Scott; Pace Ben; van Zwieten Lukas; Marjo Christopher E.; Thomas Torsten; Rawal Aditya; Hook James;

  • 作者单位

    Federat Univ, Fac Sci & Technol, Sch Appl & Biomed Sci, Churchill, Vic 3842, Australia;

    Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia;

    Federat Univ, Fac Sci & Technol, Sch Appl & Biomed Sci, Churchill, Vic 3842, Australia;

    Univ New South Wales, Mark Wainwright Analyt Ctr, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia;

    Univ Newcastle, Sch Environm & Life Sci, Off C325, Chem, Callaghan, NSW 2308, Australia;

    Univ New South Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia;

    Wollongbar Primary Ind Inst, NSW Dept Primary Ind, Wollongbar, NSW 2477, Australia;

    Univ New South Wales, Mark Wainwright Analyt Ctr, Sydney, NSW 2052, Australia;

    Univ New South Wales, Sch Biol Earth & Environm Sci, Ctr Marine Bioinnovat, Sydney, NSW 2052, Australia;

    Univ New South Wales, Mark Wainwright Analyt Ctr, Sydney, NSW 2052, Australia;

    Univ New South Wales, Mark Wainwright Analyt Ctr, Sydney, NSW 2052, Australia;

  • 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

    FeSO4; Kaolinite; Bentonite; Sulfur; TD-GC/MS; LC-OCD;

    机译：FeSO4;高岭石;膨润土;硫;TD-GC / MS;LC-OCD;

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