View in EDS

Biodegradation of CO2, CH4 and volatile organic compounds (VOCs) in soil gas from the Vicano–Cimino hydrothermal system (central Italy).

Saved in:
Bibliographic Details
Title: Biodegradation of CO2, CH4 and volatile organic compounds (VOCs) in soil gas from the Vicano–Cimino hydrothermal system (central Italy).
Authors: Tassi, F.1,2 franco.tassi@unifi.it, Venturi, S.1,2, Cabassi, J.1,2, Vaselli, O.1,2, Gelli, I.1, Cinti, D.3, Capecchiacci, F.1,2
Source: Organic Geochemistry. Sep2015, Vol. 86, p81-93. 13p.
Subjects: Carbon dioxide analysis, Methane analysis, Biodegradation of volatile organic compounds, Soil air, Oxidation, Air pollution
Abstract: We investigated the effect of microbial activity on the chemistry of hydrothermal fluids related to the Vicano–Cimino system, central Italy. The database included the composition and δ 13 C CO 2 and δ 13 C CH 4 values for soil gas from an area characterized by intense degassing of fluids having a deep origin. The δ 13 C CH 4 values along vertical profiles in the soil indicated that CH 4 was controlled by microbial oxidation occurring at shallow (< 50 cm) depth, where free O 2 was available. This was consistent with the vertical gradients of CH 4 , H 2 S and O 2 concentrations. The δ 13 C CO 2 values in soil gas, characterized by a composition similar to that of the hydrothermal fluids, were not significantly influenced by biodegradation. On the contrary, gas strongly affected by air contamination showed a significant δ 13 C CO 2 fractionation. Microbial activity caused strong consumption of hydrothermal alkanes, alkenes, cyclics and hydrogenated halocarbons, whereas benzene was recalcitrant. Oxygenated compounds from hydrocarbon degradation consisted of alcohols, with minor aldehydes, ketones and carboxylic acids. A predominance of alcohols at a high rate of degassing flux, corresponding to a short residence time of hydrothermal gas within the soil, indicated incomplete oxidation. N-bearing compounds were likely produced by humic substances in the soil and/or related to contamination by pesticides, whereas α-pinene traced air entering the soil. The study demonstrates that microbial communities in the soil play an important role for mitigating the release to the atmosphere of C-bearing gases, especially CH 4 , through diffuse soil degassing, a mechanism that in central Italy significantly contributes to the discharge of CO 2 -rich gas from deep sources. [ABSTRACT FROM AUTHOR]
Copyright of Organic Geochemistry is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
Database: Engineering Source
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 108551968
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Biodegradation of CO2, CH4 and volatile organic compounds (VOCs) in soil gas from the Vicano–Cimino hydrothermal system (central Italy).
– Name: Author
  Label: Authors
  Group: Au
  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Tassi%2C+F%2E%22&quot;&gt;Tassi, F.&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt;&lt;i&gt; franco.tassi@unifi.it&lt;/i&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Venturi%2C+S%2E%22&quot;&gt;Venturi, S.&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Cabassi%2C+J%2E%22&quot;&gt;Cabassi, J.&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Vaselli%2C+O%2E%22&quot;&gt;Vaselli, O.&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Gelli%2C+I%2E%22&quot;&gt;Gelli, I.&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Cinti%2C+D%2E%22&quot;&gt;Cinti, D.&lt;/searchLink&gt;&lt;relatesTo&gt;3&lt;/relatesTo&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Capecchiacci%2C+F%2E%22&quot;&gt;Capecchiacci, F.&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt;
– Name: TitleSource
  Label: Source
  Group: Src
  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Organic+Geochemistry%22&quot;&gt;Organic Geochemistry&lt;/searchLink&gt;. Sep2015, Vol. 86, p81-93. 13p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Carbon+dioxide+analysis%22&quot;&gt;Carbon dioxide analysis&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Methane+analysis%22&quot;&gt;Methane analysis&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Biodegradation+of+volatile+organic+compounds%22&quot;&gt;Biodegradation of volatile organic compounds&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Soil+air%22&quot;&gt;Soil air&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Oxidation%22&quot;&gt;Oxidation&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Air+pollution%22&quot;&gt;Air pollution&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We investigated the effect of microbial activity on the chemistry of hydrothermal fluids related to the Vicano–Cimino system, central Italy. The database included the composition and δ 13 C CO 2 and δ 13 C CH 4 values for soil gas from an area characterized by intense degassing of fluids having a deep origin. The δ 13 C CH 4 values along vertical profiles in the soil indicated that CH 4 was controlled by microbial oxidation occurring at shallow (&lt; 50 cm) depth, where free O 2 was available. This was consistent with the vertical gradients of CH 4 , H 2 S and O 2 concentrations. The δ 13 C CO 2 values in soil gas, characterized by a composition similar to that of the hydrothermal fluids, were not significantly influenced by biodegradation. On the contrary, gas strongly affected by air contamination showed a significant δ 13 C CO 2 fractionation. Microbial activity caused strong consumption of hydrothermal alkanes, alkenes, cyclics and hydrogenated halocarbons, whereas benzene was recalcitrant. Oxygenated compounds from hydrocarbon degradation consisted of alcohols, with minor aldehydes, ketones and carboxylic acids. A predominance of alcohols at a high rate of degassing flux, corresponding to a short residence time of hydrothermal gas within the soil, indicated incomplete oxidation. N-bearing compounds were likely produced by humic substances in the soil and/or related to contamination by pesticides, whereas α-pinene traced air entering the soil. The study demonstrates that microbial communities in the soil play an important role for mitigating the release to the atmosphere of C-bearing gases, especially CH 4 , through diffuse soil degassing, a mechanism that in central Italy significantly contributes to the discharge of CO 2 -rich gas from deep sources. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: &lt;i&gt;Copyright of Organic Geochemistry is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder&#39;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.&lt;/i&gt; (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=108551968
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.orggeochem.2015.06.004
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 81
    Subjects:
      – SubjectFull: Carbon dioxide analysis
        Type: general
      – SubjectFull: Methane analysis
        Type: general
      – SubjectFull: Biodegradation of volatile organic compounds
        Type: general
      – SubjectFull: Soil air
        Type: general
      – SubjectFull: Oxidation
        Type: general
      – SubjectFull: Air pollution
        Type: general
    Titles:
      – TitleFull: Biodegradation of CO2, CH4 and volatile organic compounds (VOCs) in soil gas from the Vicano–Cimino hydrothermal system (central Italy).
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Tassi, F.
      – PersonEntity:
          Name:
            NameFull: Venturi, S.
      – PersonEntity:
          Name:
            NameFull: Cabassi, J.
      – PersonEntity:
          Name:
            NameFull: Vaselli, O.
      – PersonEntity:
          Name:
            NameFull: Gelli, I.
      – PersonEntity:
          Name:
            NameFull: Cinti, D.
      – PersonEntity:
          Name:
            NameFull: Capecchiacci, F.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 09
              Text: Sep2015
              Type: published
              Y: 2015
          Identifiers:
            – Type: issn-print
              Value: 01466380
          Numbering:
            – Type: volume
              Value: 86
          Titles:
            – TitleFull: Organic Geochemistry
              Type: main
ResultId 1