Contribution of the Photo-Fenton Reaction to Hydroxyl Radical Formation Rates in River and Rain Water Samples
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00047034
ID | 47034 |
file | |
creator |
Nakatani, Nobutake
Ueda, Marina
Shindo, Hirotaka
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NDC |
Chemistry
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abstract | The hydroxyl radical (OH radical) formation rates from the photo-Fenton reaction in river and rain water samples were determined by using deferoxamine mesylate (DFOM), which makes a stable and strong complex with Fe(III), resulting in a suppression of the photo-Fenton reaction. The difference between the OH radical formation rates with and without added DFOM denotes the rate from the photo-Fenton reaction. The photoformation rates from the photo-Fenton reaction were in the range of 0.7 - 45.8 × 10-12 and 2.7 - 32.3 × 10-12 M s-1 in river and rain water samples, respectively. A strong positive correlation between the OH radical formation rate from the photo-Fenton reaction and the amount of fluorescent matter in river water suggests that fluorescent matter, such as humic substances, plays an important role in the photo-Fenton reaction. In rain water, direct photolysis of hydrogen peroxide was an important source of OH radicals as well as the photo-Fenton reaction. The contributions of the photo-Fenton reaction to the OH radical photoformation rates in river and rain water samples were in the ranges of 2 - 29 and 5 - 38%, respectively. Taking into account the photo-Fenton reaction, 33 - 110 (mean: 80) and 42 - 110 (mean: 84)% of OH radical sources in river and rain water samples, respectively, collected in Hiroshima prefecture were elucidated.
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description | This study was supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan by a Grant-in Aid for Scientific Research (No. 18310010).
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journal title |
Analytical Sciences
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volume | Volume 23
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issue | Issue 9
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start page | 1137
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end page | 1142
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date of issued | 2007-09
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publisher | The Japan Society for Analytical Chemistry
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issn | 0910-6340
1348-2246
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publisher doi | |
language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | publisher
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rights | 2007 © The Japan Society for Analytical Chemistry
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relation url | |
department |
Graduate School of Biosphere Science
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