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Characterization and Phenanthrene Sorption of Natural and Pyrogenic Organic Matter Fractions

机译：天然和热解有机物馏分的表征和菲吸附

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摘要

Pyrogenic humic acid (HA) is released into the environment during the large-scale application of biochar. However, the biogeochemistry of pyrogenic organic matter (PyOM) fractions and their sorption of hydrophobic organic compounds (HOCs) are poorly understood in comparison with natural organic matter (NOM) fractions. HA and hum in (HM) fractions isolated from soils and the oxidized biochars were characterized. Sorption of phenanthrene (PHE) by these fractions was also examined. The characterization results demonstrate that pyrogenic HAs are different from natural HAs, with the former having lower atomic H/C ratios, more abundant aromatic C, and higher concentrations of surface carboxylic groups. Compared with the fresh biochars, the K_oc of PHE on their oxidized biochars, pyrogenic HA, and HM fractions were undiminished, which is encouraging for the use of biochar in soil remediation. The PyOM fractions exhibited stronger nonlinear sorption than the NOM fractions. In addition, the PyOM fractions had higher sorption capacity than the NOM fractions due to their low polar C content and high aryl C content. The results obtained from this work will shed new light on the impact of the addition of biochar on the biogeochemistry of soil organic matter and on the fate of HOCs in biochar-amended soil.
机译：在生物炭的大规模应用过程中，热解腐殖酸（HA）被释放到环境中。但是，与天然有机物（NOM）相比，热解有机物（PyOM）馏分的生物地球化学及其对疏水性有机化合物（HOCs）的吸附了解甚少。从土壤和氧化的生物炭中分离出的HA和腐殖质（HM）组分进行了表征。还研究了这些馏分对菲（PHE）的吸附。表征结果表明，热解HA与天然HA不同，前者具有较低的原子H / C比，更丰富的芳族C和较高浓度的表面羧基。与新鲜生物炭相比，PHE在其氧化生物炭，热解HA和HM馏分上的K_oc均未降低，这为生物炭在土壤修复中的使用提供了鼓励。 PyOM馏分比NOM馏分表现出更强的非线性吸附。另外，由于低极性C含量和高芳基C含量，PyOM馏分具有比NOM馏分更高的吸附能力。这项工作获得的结果将为添加生物炭对土壤有机物生物地球化学的影响以及对生物炭改良过的土壤中HOC的命运提供新的启示。

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  • 来源
    《Environmental Science & Technology》 |2017年第5期|2635-2642|共8页
  • 作者

    Jie Jin; Ke Sun; Ziying Wang; Yan Yang; Lanfang Han; Baoshan Xing;

  • 作者单位

    SchooI of Environment and Chemical Engineering, North China Electric Power University, Beijing 102206, China ,State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China ,Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States;

    State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;

    State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;

    State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China;

    State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China ,Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States;

    Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States;

  • 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);
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