| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Photoformation of reactive oxygen species and their potential to degrade highly toxic carbaryl and methomyl in river water |
|
言語 |
en |
| 作成者 |
Derbalah, Aly
Sunday, Michael
Kato, Ryota
Takeda, Kazuhiko
Sakugawa, Hiroshi
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| 権利情報 |
|
|
権利情報 |
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。 |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Hydroxyl radicals |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Singlet oxygen |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Methomyl |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Carbaryl |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Photolysis |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Water |
| 内容記述 |
|
|
内容記述 |
Reactive oxygen species (ROS) including singlet oxygen (1O2) and hydroxylradicals (radical dotOH) photogenerated in natural waters play important roles in indirect photolysis of man-made pollutants. This study was conducted to investigate how the generation of these two ROS influences the degradation of two highly toxic insecticides (methomyl and carbaryl) in river water. To accomplish this, the reaction rate constants of 1O2 and radical dotOH with carbaryl and methomyl were determined; the degradation rate constants of the tested insecticides in ultrapure water (direct photolysis) and in river water in the presence and absence of 1O2 and radical dotOH scavengers were also measured. The rate constants for the reaction of radical dotOH with carbaryl and methomyl were found to be (14.8 ± 0.64) × 109 and (4.68 ± 0.52) × 109 M−1 s−1, respectively. The reaction rate constant of 1O2 with carbaryl (2.98 ± 0.10) × 105 M−1 s−1, was much higher than that of methomyl (<104 M−1 s−1). Indirect photolysis by radical dotOH accounted for 63% and 62%, while 1O2 accounted for 26% and 30% and direct photolysis accounted for 1.4% and 7% of methomyl and carbaryl degradation, respectively. The high degradation rate in river water demonstrated by both insecticides suggests that indirect photolysis mediated by radical dotOH is an important means of their degradation in river water. In addition, kinetic calculations of radical dotOH-mediated degradation rate constants of the compounds agrees with their experimentally-determined values thereby confirming the importance of radical dotOH towards their degradation. |
|
言語 |
en |
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
The Japan Society for the Promotion of Science (JSPS) is acknowledged for funding an invitation research fellowship provided to Professor Aly Derbalah at Hiroshima University, Japan. This study was supported by JSPS KAKENHI grant number 16KT0149 and 161T05622, Japan. |
| 出版者 |
|
|
出版者 |
Elsevier |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
AO |
|
出版タイプResource |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1016/j.chemosphere.2019.125464 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1016/j.chemosphere.2019.125464 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0045-6535 |
| 開始ページ |
|
|
開始ページ |
125464 |
| 書誌情報 |
Chemosphere
Chemosphere
巻 244,
p. 125464,
発行日 2019-11-25
|
| 旧ID |
51069 |
| 備考 |
The full-text file will be made open to the public on 25 Nov 2021 in accordance with publisher's 'Terms and Conditions for Self-Archiving' |
Chemosphere_244_125464.pdf (994.0 KB)
