2024-03-29T06:51:16Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00016317
2023-03-09T01:43:53Z
1595:1596:1598:1602
Molecular changes in dissolved organic matter during photodegradation
Tareq, Shafi M
Maruo, Masahiro
Nagahuchi, Osamu
Ohta, Keiichi
Humic substance
HPSEC
Lake Biwa
Biogeochemistry
The high-performance-size exclusion chromatograph (HPSEC) separated dissolved organic matter (DOM) of lake Biwa andriver water into three major peaks of apparent molecular weight of 1200 (peakl) 800 (peak2) and 300 Da (peak3). Mimic pbotodegradation experiments on DOM in Lake Biwa showed that solar irradiation caused a decreaseinthe both UV and fluorescence intenslty. The decreaslng trends of the ratio between peak area of peak2 and peak3 With photodegradtion process indicated that large photo sensitive molecules are fragmented into small molecules dming photodegradation, The flrStl0rder reaction kinetics was applied toanalyze the photodegradation of DOM. Two-step photodegradation was suggested forthefluorescent DOM with different rate constant values, Results obtained in the present study suggested that fluorescent DOM is susceptible to photodegradation and fragmented to relatively smaller size molecllles with the progress of photodegradation,
Article
信州大学山地水環境教育研究センター研究報告 6: 29-34(2010)
信州大学山地水環境教育研究センター
2010-02-10
eng
departmental bulletin paper
VoR
http://hdl.handle.net/10091/10241
https://soar-ir.repo.nii.ac.jp/records/16317
1348-7612
AA11887942
信州大学山地水環境教育研究センター研究報告
6
29
34
https://soar-ir.repo.nii.ac.jp/record/16317/files/Inlandwater06-008.pdf
application/pdf
322.2 kB
2015-09-28