Source Journal of CSCD
Source Journal for Chinese Scientific and Technical Papers
Core Journal of RCCSE
Included in JST China
Volume 42 Issue 3
Mar.  2024
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LI Xu, XUE Shuang, YU Yingtan, JIANG Caihong, LIU Qiang. RELEASE LAW OF TRIPLET STATES OF DISSOLVED ORGANIC MATTER DURING ICE MELTING PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 41-50. doi: 10.13205/j.hjgc.202403005
Citation: LI Xu, XUE Shuang, YU Yingtan, JIANG Caihong, LIU Qiang. RELEASE LAW OF TRIPLET STATES OF DISSOLVED ORGANIC MATTER DURING ICE MELTING PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(3): 41-50. doi: 10.13205/j.hjgc.202403005

RELEASE LAW OF TRIPLET STATES OF DISSOLVED ORGANIC MATTER DURING ICE MELTING PROCESS

doi: 10.13205/j.hjgc.202403005
  • Received Date: 2023-02-08
    Available Online: 2024-05-31
  • The water of Hun River (HR) and Dingxiang Lake (DXL) in Shenyang City, Liaoning Province was selected as the research objects, the changes in spectral properties of dissolved organic matter (DOM), as well as the release of DOM, fluorescent matter, and the triplet states of dissolved organic matter (3DOM*) during ice melting process at different temperatures were investigated in this study. The leaching experiments and laboratory simulation photolysis experiments were conducted, and 2, 4, 6-trimethylphenol (TMP) was selected as the probe of 3DOM*. The results showed that the lower the melting temperature, the SUVA254, E2/E3 of the two water samples increased significantly, and the increase of DXL was more obvious. HR and DXL samples both contain fulvic acid and humic acid substances, and HR samples also contain aromatic protein substances. With the same freezing temperature, the lower the melting temperature, the more regular the precipitation of fluorescent substances from the sample, showing a gradually decreasing trend. The lower the melting temperature, the more regular the release of 3DOM*, which was particularly obvious for HR. The steady-state concentration of 3DOM* at the initial melting stage of HR was 4.1 times that of the original water sample.
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