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Impact of De-Ashing Humic Acid and Humin on Organic Matter Structural Properties and Sorption Mechanisms of Phenanthrene.

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Title: Impact of De-Ashing Humic Acid and Humin on Organic Matter Structural Properties and Sorption Mechanisms of Phenanthrene.
Authors: Yu Yang1, Liang Shu1, Xilong Wang1 xilong@urban.pku.edu.cn, Baoshan Xing2, Shu Tao1,2 taos@urban.pku.edu.cn
Source: Environmental Science & Technology. 5/1/2011, Vol. 45 Issue 9, p3996-4002. 4p.
Subjects: Humic acid, Humins, Phenanthrene, Organic compounds research, Chemical structure, Adsorption (Chemistry), Environmental chemistry
Abstract: Organic matter-mineral interactions greatly affect the fate 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 KOC 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 partly due to the crystalline structure in organic matter as indicated by differential scanning calorimetric (DSC) and 13C NMR data and the interference from minerals. A good correlation between surface polarity of the original and de-ashed HAs and HMs and their Koc 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 13C NMR, XPS, and elemental composition data of all tested sorbente 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. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Science & Technology is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 60792509
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Impact of De-Ashing Humic Acid and Humin on Organic Matter Structural Properties and Sorption Mechanisms of Phenanthrene.
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  Data: <searchLink fieldCode="AR" term="%22Yu+Yang%22">Yu Yang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Liang+Shu%22">Liang Shu</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Xilong+Wang%22">Xilong Wang</searchLink><relatesTo>1</relatesTo><i> xilong@urban.pku.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Baoshan+Xing%22">Baoshan Xing</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Shu+Tao%22">Shu Tao</searchLink><relatesTo>1,2</relatesTo><i> taos@urban.pku.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Technology%22">Environmental Science & Technology</searchLink>. 5/1/2011, Vol. 45 Issue 9, p3996-4002. 4p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Humic+acid%22">Humic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Humins%22">Humins</searchLink><br /><searchLink fieldCode="DE" term="%22Phenanthrene%22">Phenanthrene</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+compounds+research%22">Organic compounds research</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+structure%22">Chemical structure</searchLink><br /><searchLink fieldCode="DE" term="%22Adsorption+%28Chemistry%29%22">Adsorption (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Environmental+chemistry%22">Environmental chemistry</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Organic matter-mineral interactions greatly affect the fate 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 KOC 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 partly due to the crystalline structure in organic matter as indicated by differential scanning calorimetric (DSC) and 13C NMR data and the interference from minerals. A good correlation between surface polarity of the original and de-ashed HAs and HMs and their Koc 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 13C NMR, XPS, and elemental composition data of all tested sorbente 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. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Environmental Science & Technology is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1021/es2003149
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 4
        StartPage: 3996
    Subjects:
      – SubjectFull: Humic acid
        Type: general
      – SubjectFull: Humins
        Type: general
      – SubjectFull: Phenanthrene
        Type: general
      – SubjectFull: Organic compounds research
        Type: general
      – SubjectFull: Chemical structure
        Type: general
      – SubjectFull: Adsorption (Chemistry)
        Type: general
      – SubjectFull: Environmental chemistry
        Type: general
    Titles:
      – TitleFull: Impact of De-Ashing Humic Acid and Humin on Organic Matter Structural Properties and Sorption Mechanisms of Phenanthrene.
        Type: main
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          Name:
            NameFull: Yu Yang
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            NameFull: Liang Shu
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            NameFull: Xilong Wang
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            NameFull: Baoshan Xing
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            NameFull: Shu Tao
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            – D: 01
              M: 05
              Text: 5/1/2011
              Type: published
              Y: 2011
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              Value: 45
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              Value: 9
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            – TitleFull: Environmental Science & Technology
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