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The Photofate of Pesticides and Diss...

Yuan, Chenyi.

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The Photofate of Pesticides and Dissolved Organic Matter in Diverse Aquatic Systems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The Photofate of Pesticides and Dissolved Organic Matter in Diverse Aquatic Systems./
Author:	Yuan, Chenyi.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	154 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
Contained By:	Dissertation Abstracts International78-10B(E).
Subject:	Environmental science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10610261
ISBN:	9781369839876

The Photofate of Pesticides and Dissolved Organic Matter in Diverse Aquatic Systems.
Yuan, Chenyi.

The Photofate of Pesticides and Dissolved Organic Matter in Diverse Aquatic Systems. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 154 p.

Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.

Thesis (Ph.D.)--The Ohio State University, 2017.

The application of pesticides to agricultural fields has impaired receiving water quality and possibly affected both ecosystem function and biodiversity in lotic systems. Photochemical reactions may be important pesticide attenuation mechanisms in shallow sunlit waters. However, the ubiquitous presence of ill-defined dissolved organic matter (DOM) coupled with the presence of iron (Fe) have added to the difficulty in understanding and predicting the environmental fate of pesticides in diverse water bodies over diurnal cycles.

ISBN: 9781369839876Subjects--Topical Terms:

677245
Environmental science.

The Photofate of Pesticides and Dissolved Organic Matter in Diverse Aquatic Systems.
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020 $a 9781369839876
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035 $a (MiAaPQ)OhioLINK:osu148710499961032
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040 $a MiAaPQ $c MiAaPQ
100 1 $a Yuan, Chenyi. $3 3426298
245 1 4 $a The Photofate of Pesticides and Dissolved Organic Matter in Diverse Aquatic Systems.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 154 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-10(E), Section: B.
500 $a Advisers: Linda Weavers; Yu-Ping Chin.
502 $a Thesis (Ph.D.)--The Ohio State University, 2017.
520 $a The application of pesticides to agricultural fields has impaired receiving water quality and possibly affected both ecosystem function and biodiversity in lotic systems. Photochemical reactions may be important pesticide attenuation mechanisms in shallow sunlit waters. However, the ubiquitous presence of ill-defined dissolved organic matter (DOM) coupled with the presence of iron (Fe) have added to the difficulty in understanding and predicting the environmental fate of pesticides in diverse water bodies over diurnal cycles.
520 $a This study investigated the impact of sunlight intensity, DOM, and Fe on the transformation of two pesticides: isoproturon and acetochlor. Change in light intensity, especially the natural diurnal cycle, was found to be important for isoproturon photofate due to its "apparent" photodegradation coupled to regeneration in the dark. For acetochlor, the addition of Fe in natural wetland waters was found to be especially beneficial at moderately and highly acidic pH values. In a highly acidic aqueous environment i.e., acid mine drainage (AMD) impacted waters, which are common in coal-producing regions of the country, the presence of high Fe levels impacted both phototransformation and photomineralization of acetochlor and DOM for which rates were orders of magnitude faster than most natural water bodies. This high photoreactivity may make AMD impacted waters a potential resource for pesticide attenuation, but the effects on receiving water ecosystems by transformed/mineralized DOM also need to be considered.
590 $a School code: 0168.
650 4 $a Environmental science. $3 677245
650 4 $a Limnology. $3 545788
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710 2 $a The Ohio State University. $b Environmental Science. $3 1676894
773 0 $t Dissertation Abstracts International $g 78-10B(E).
790 $a 0168
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792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10610261