The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture
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The Ohio State University / OhioLINK
2009
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1250091344 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu12500913442021-08-03T05:56:49Z The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture Guerard, Jennifer J. Chemistry Environmental Science dissolved organic matter sulfadiemethoxine ormetoprim photochemistry fulvic acid <p>Antibiotics are a class of pharmaceuticals specifically engineered to kill pathogenic bacteria. In addition to medicinal applications for treating people, antibiotics are also used in a number of agricultural industries to prevent the spread of harmful and costly diseases. However, the increased prevalence of resistant strains of bacteria hasraised concern about the environmental fate of such compounds, particularly once in the natural environment. For many antibiotics, little information is known about their breakdown or fate in natural waters.</p><p>This work investigated the photochemical transformation of two antibiotics commonly used in aquaculture (catfish), sulfadimethoxine and ormetoprim and the role that dissolved organic matter (DOM) composition plays on the fate of these compounds. Sulfadimethoxine degradation was found to be dependent on DOM source composition, and degraded via triplet excited state pathways. Ormetoprim was found to degrade through indirect pathways that included transformation via two reactive oxygen species(ROS) promoted by DOM - the hydroxyl radical and singlet oxygen.</p><p>The effects of source on dissolved organic matter composition were studied, and an intensive investigation was performed to characterize the photoreactivity of a fulvic acid isolated from Pony Lake on Cape Royds, Ross Island, Antarctica, a completely microbially-derived DOM end-member.</p> 2009-09-24 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1250091344 http://rave.ohiolink.edu/etdc/view?acc_num=osu1250091344 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Chemistry Environmental Science dissolved organic matter sulfadiemethoxine ormetoprim photochemistry fulvic acid |
| spellingShingle |
Chemistry Environmental Science dissolved organic matter sulfadiemethoxine ormetoprim photochemistry fulvic acid Guerard, Jennifer J. The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture |
| author |
Guerard, Jennifer J. |
| author_facet |
Guerard, Jennifer J. |
| author_sort |
Guerard, Jennifer J. |
| title |
The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture |
| title_short |
The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture |
| title_full |
The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture |
| title_fullStr |
The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture |
| title_full_unstemmed |
The Characterization of Dissolved Organic Matter and its Influence on the Photochemical Fate of Antibiotics used in Aquaculture |
| title_sort |
characterization of dissolved organic matter and its influence on the photochemical fate of antibiotics used in aquaculture |
| publisher |
The Ohio State University / OhioLINK |
| publishDate |
2009 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1250091344 |
| work_keys_str_mv |
AT guerardjenniferj thecharacterizationofdissolvedorganicmatteranditsinfluenceonthephotochemicalfateofantibioticsusedinaquaculture AT guerardjenniferj characterizationofdissolvedorganicmatteranditsinfluenceonthephotochemicalfateofantibioticsusedinaquaculture |
| _version_ |
1719428264646148096 |