Volume 37 Issue 3
May  2012
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HUANG Shuang-bin, WANG Yan-xing, CHAO Ling, WANG Cheng, YU Mei, PI Kun-fu, JIA Chen-zhong, 2012. Characterization of DOM from Soil in Unsaturated Zone and Its Implications on Arsenic Mobilization into Groundwater. Earth Science, 37(3): 605-611. doi: 10.3799/dqkx.2012.069
Citation: HUANG Shuang-bin, WANG Yan-xing, CHAO Ling, WANG Cheng, YU Mei, PI Kun-fu, JIA Chen-zhong, 2012. Characterization of DOM from Soil in Unsaturated Zone and Its Implications on Arsenic Mobilization into Groundwater. Earth Science, 37(3): 605-611. doi: 10.3799/dqkx.2012.069

Characterization of DOM from Soil in Unsaturated Zone and Its Implications on Arsenic Mobilization into Groundwater

doi: 10.3799/dqkx.2012.069
  • Received Date: 2011-06-15
    Available Online: 2021-11-09
  • Publish Date: 2012-05-01
  • 3D fluorescent spectra analysis was conducted to understand the characteristics of dissolved organic matter (DOM) from soil of unsaturated zone and its potential influence on arsenic transport into groundwater. The results show that the humic-like component is the major constituent of DOM. The decrease in fluorescence intensity with depth is attributed to the reduction in aromatic functional groups. The irregular variation of the intensity in localized depth indicates the changes in DOM components or its major functional groups on soil section. Fluorescence information of DOM can be specifically decomposed by PARAFAC into four components, which are respectively similar to microbial reduced quinones, microbial oxidized quinones, terrestrial fulvic acid and so on. It is suggested that arsenic may be complexed by humic-DOMs and migrate with them into groundwater and the mobilization of arsenic also can be associated with the microbial quinones. Thus, 3D fluorescent spectra have been demonstrated to be a convenient and effective tool in DOM characterization and facilitate further study on effects on arsenic mobilization.

     

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