Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination

Matsushita, Taku; Morimoto, Ayako; Kuriyama, Taisuke; Matsumoto, Eisuke; Matsui, Yoshihiko; Shirasaki, Nobutaka; Kondo, Takashi; Takanashi, Hirokazu; Kameya, Takashi

Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination

Matsushita, Taku; Morimoto, Ayako; Kuriyama, Taisuke et al.

Water research, 2018, 138, 67-76

Permalink : https://hdl.handle.net/2115/78769

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アクセス権	open access
URI	https://hdl.handle.net/2115/78769
タイトル	Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination
著者	Matsushita, Taku ; Morimoto, Ayako ; Kuriyama, Taisuke ; Matsumoto, Eisuke ; Matsui, Yoshihiko ; Shirasaki, Nobutaka ; Kondo, Takashi ; Takanashi, Hirokazu ; Kameya, Takashi
e-Rad_Researcher 30283401 著者名 Matsushita, Taku
著者名 Morimoto, Ayako
著者名 Kuriyama, Taisuke
著者名 Matsumoto, Eisuke
e-Rad_Researcher 00173790 著者名 Matsui, Yoshihiko
著者名 Shirasaki, Nobutaka
著者名 Kondo, Takashi
著者名 Takanashi, Hirokazu
著者名 Kameya, Takashi
言語	英語
キーワード	Activated carbon adsorption
	Coagulation and sedimentation
	Disinfection by-product
	Ozonation
	Removal mechanisms
	Toxicity
発行日	2018-07-01
出版者	Elsevier
収録物名	Water research
巻(号)	138
ページ	67-76
抄録	Removal efficiencies of 28 pesticide transformation products (TPs) and 15 parent pesticides during steps in drinking water treatment (coagulation-sedimentation, activated carbon adsorption, and ozonation) were estimated via laboratory-scale batch experiments, and the mechanisms underlying the removal at each step were elucidated via regression analyses. The removal via powdered activated carbon (PAC) treatment was correlated positively with the log K-ow at pH 7. The adjusted coefficient of determination (r(2)) increased when the energy level of the highest occupied molecular orbital (HOMO) was added as an explanatory variable, the suggestion being that adsorption onto PAC particles was largely governed by hydrophobic interactions. The residual error could be partly explained by pi-pi electron donor-acceptor interactions between the graphene surface of the PAC particles and the adsorbates. The removal via ozonation correlated positively with the energy level of the HOMO, probably because compounds with relatively high energy level HOMOs could more easily transfer an electron to the lowest unoccupied molecular orbital of ozone. Overall, the TPs tended to be more difficult to remove via PAC adsorption and ozonation than their parent pesticides. However, the TPs that were difficult to remove via PAC adsorption did not induce strong mutagenicity after chlorination, and the TPs that were associated with strong mutagenicity after chlorination could be removed via PAC adsorption. Therefore, PAC adsorption is hypothesized to be an effective method of treating drinking water to reduce the possibility of postchlorination mutagenicity associated with both TPs and their parent pesticides.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0043-1354
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.watres.2018.01.028