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

LI Xu; XUE Shuang; YU Yingtan; JIANG Caihong; LIU Qiang

doi:10.13205/j.hjgc.202403005

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

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

doi: 10.13205/j.hjgc.202403005

School of Environmental Science, Liaoning University, Shenyang 110036, China

Received Date: 2023-02-08
Available Online: 2024-05-31

Abstract

Abstract

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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References(39)

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