Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insights
Ten years of field data from an Oklahoma drinking water utility were analyzed for the effects of an acid-stabilized, ionic copper algaecide/bactericide called EarthTec on geosmin concentrations in the water traveling by pipeline from the source lake to a water treatment plant. The data show that geo...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844021018090 |
| _version_ | 1818695556138008576 |
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| author | David Hammond Anthony Murri Sergey Mastitsky Ziming Yang Roy Foster Linda Schweitzer |
| author_facet | David Hammond Anthony Murri Sergey Mastitsky Ziming Yang Roy Foster Linda Schweitzer |
| author_sort | David Hammond |
| collection | DOAJ |
| description | Ten years of field data from an Oklahoma drinking water utility were analyzed for the effects of an acid-stabilized, ionic copper algaecide/bactericide called EarthTec on geosmin concentrations in the water traveling by pipeline from the source lake to a water treatment plant. The data show that geosmin already present in the raw water is reduced more during periods of applying algaecide than when not. Median reduction in geosmin concentration from pipe intake to pipe outfall by natural degradation without addition of algaecide was 5.6 ng/L removed (56.7% reduction) and improved to 126 ng/L removed (83% reduction) during periods the algaecide was being dosed at 1 μL/L, equivalent to 0.06 mg/L as copper. A laboratory study to replicate the phenomenon at bench-scale showed that either the algaecide itself or its copper-free acidic carrier can be used to depress pH and drive a reaction converting geosmin to an odorless dehydration product, argosmin. Algaecides intuitively reduce the organisms that produce geosmin, but this study shows that geosmin already present in the water is also being reduced through chemical conversion to the odorless argosmin, representing a novel means of geosmin removal in drinking water. |
| first_indexed | 2024-12-17T13:47:21Z |
| format | Article |
| id | doaj.art-a4fa1d85d2c74a41bca870ba59f12d8a |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-17T13:47:21Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-a4fa1d85d2c74a41bca870ba59f12d8a2022-12-21T21:46:07ZengElsevierHeliyon2405-84402021-08-0178e07706Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insightsDavid Hammond0Anthony Murri1Sergey Mastitsky2Ziming Yang3Roy Foster4Linda Schweitzer5Earth Science Laboratories, 903 N 47th Street, Rogers, AR 72712, USA; Corresponding author.Department of Chemistry, Oakland University, Rochester, MI 48309, USANext Game Solutions, Sepapaja 6, Tallinn, 15551, EstoniaDepartment of Chemistry, Oakland University, Rochester, MI 48309, USACity of Tulsa, 3600 Mohawk Blvd, Tulsa, OK 74115, USASouthern University Agricultural Research and Extension Center, Baton Rouge, LA 70813, USATen years of field data from an Oklahoma drinking water utility were analyzed for the effects of an acid-stabilized, ionic copper algaecide/bactericide called EarthTec on geosmin concentrations in the water traveling by pipeline from the source lake to a water treatment plant. The data show that geosmin already present in the raw water is reduced more during periods of applying algaecide than when not. Median reduction in geosmin concentration from pipe intake to pipe outfall by natural degradation without addition of algaecide was 5.6 ng/L removed (56.7% reduction) and improved to 126 ng/L removed (83% reduction) during periods the algaecide was being dosed at 1 μL/L, equivalent to 0.06 mg/L as copper. A laboratory study to replicate the phenomenon at bench-scale showed that either the algaecide itself or its copper-free acidic carrier can be used to depress pH and drive a reaction converting geosmin to an odorless dehydration product, argosmin. Algaecides intuitively reduce the organisms that produce geosmin, but this study shows that geosmin already present in the water is also being reduced through chemical conversion to the odorless argosmin, representing a novel means of geosmin removal in drinking water.http://www.sciencedirect.com/science/article/pii/S2405844021018090GeosminTaste and odorPretreatmentCyanobacteriaDrinking waterArgosmin |
| spellingShingle | David Hammond Anthony Murri Sergey Mastitsky Ziming Yang Roy Foster Linda Schweitzer Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insights Heliyon Geosmin Taste and odor Pretreatment Cyanobacteria Drinking water Argosmin |
| title | Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insights |
| title_full | Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insights |
| title_fullStr | Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insights |
| title_full_unstemmed | Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insights |
| title_short | Geosmin reduction by algaecide application to drinking water: field scale efficacy and mechanistic insights |
| title_sort | geosmin reduction by algaecide application to drinking water field scale efficacy and mechanistic insights |
| topic | Geosmin Taste and odor Pretreatment Cyanobacteria Drinking water Argosmin |
| url | http://www.sciencedirect.com/science/article/pii/S2405844021018090 |
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