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首页> 外文期刊>Environmental Science & Technology >Impact of De-Ashing Humic Acid and Humin on Organic Matter Structural Properties and Sorption Mechanisms of Phenanthrene
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Impact of De-Ashing Humic Acid and Humin on Organic Matter Structural Properties and Sorption Mechanisms of Phenanthrene

机译：灰化腐殖酸和腐殖质对菲有机物结构性质及吸附机理的影响

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摘要

Organic matter-mineral interactions greatly affect the fete of hydrophobic organic compounds (HOCs) in the environment In the present study, the impact of organic matter-mineral interaction on sorption of phenanthrene (PHE) by the original and de-ashed humic acids (HAs) and humin (HM) was examined. After de-ashing treatment, the overall polarity of organic matter in HAs and HM consistently decreased. Differently, the surface polarity of HAs increased but that of HM decreased. No correlation between K_(oc) values of PHE by all tested sorbents and their bulk polarity was observed due to inaccessibility of a portion of interior sorption domains. The inaccessibility of interior sorption domains in HAs and HM was paltry due to me crystalline structure in organic matter as indicated by differential scanning calorimetric (DSC) and ~(13)C NMR data and the interference from minerals. A good correlation between surface polarity of the original and de-ashed HAs and HMs and their K_∞ values for PHE indicated its importance in HOC sorption. Dissimilar changes in surface polarity of HAs and HM after de-ashing treatment can be ascribed to the distinct interactions between organic matter and minerals. The solid-state ~(13)C NMR, XPS, and elemental composition data of all tested sorbents revealed that a larger fraction of O atoms in HAs were involved in organic matter-mineral interaction as compared to HM. Results of this work highlight the importance of soil organic matter (SOM)-mineral interactions, surface polarity, and microscaled domain arrangement of SOM in HOC sorption.
机译：有机物-矿物质的相互作用极大地影响了环境中疏水有机化合物（HOCs）的含量。在本研究中，有机物-矿物质的相互作用对原始和脱灰腐殖酸（HAs）吸附菲（PHE）的影响）和humin（HM）进行了检查。除灰处理后，HA和HM中有机物的总体极性持续下降。不同的是，HAs的表面极性增加，而HM的表面极性减小。由于部分内部吸附域的不可及性，所有测试吸附剂的PHE的K_（oc）值与其本体极性之间均未发现相关性。由于差示扫描量热法（DSC）和〜（13）C NMR数据以及矿物质的干扰，有机物中的晶体结构使HAs和HM内部吸附域难以接近。原始和脱灰的HA和HM的表面极性与PHE的K_∞值之间具有良好的相关性，表明其在HOC吸附中很重要。除灰处理后，HAs和HM表面极性的不同变化可归因于有机物和矿物质之间的独特相互作用。所有测试吸附剂的固态〜（13）C NMR，XPS和元素组成数据均表明，与HM相比，HAs中的O原子中大部分参与有机物-矿物相互作用。这项工作的结果强调了HOC吸附中土壤有机质（SOM）-矿物相互作用，表面极性和SOM的微尺度域排列的重要性。

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  • 来源
    《Environmental Science & Technology》 |2011年第9期|p.3996-4002|共7页
  • 作者

    Yu Yang; Liang Shu; Xilong Wang; Baoshan Xing; Shu Tao;

  • 作者单位

    Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;

    Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;

    Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;

    Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, Massachusetts 01003, United States;

    Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China,Department of Plant, Soil and Insect Sciences, 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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