DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection
DEET (N, N-diethyl-m-toluamide) is one of the most frequently detected trace organic contaminants (TOrC) in wastewaters and is used primarily as an insect repellent. It was introduced for use in the general public in 1957. It is ubiquitously present in the environment and DEET concentrations are usu...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2019
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| Online Access: | https://hdl.handle.net/10356/90320 http://hdl.handle.net/10220/49947 |
| _version_ | 1826112657559650304 |
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| author | Marques dos Santos, Mauricius Hoppe-Jones, Christiane Snyder, Shane Allen |
| author2 | Nanyang Environment and Water Research Institute |
| author_facet | Nanyang Environment and Water Research Institute Marques dos Santos, Mauricius Hoppe-Jones, Christiane Snyder, Shane Allen |
| author_sort | Marques dos Santos, Mauricius |
| collection | NTU |
| description | DEET (N, N-diethyl-m-toluamide) is one of the most frequently detected trace organic contaminants (TOrC) in wastewaters and is used primarily as an insect repellent. It was introduced for use in the general public in 1957. It is ubiquitously present in the environment and DEET concentrations are usually among the highest reported for TOrCs. Due to recent concerns about possible analytical interferences in detection methods being reported, this study focused on possible artifacts caused by seasonal, spatial, and diurnal variations in wastewater influent concentration of DEET. We also compared usage data to observed wastewater concentrations of seven wastewater treatment plants (WWTPs) in four different regions in the US monitored from November 2014 to November 2016. Consumption data obtained reveal patterns of consumption according to climatic regions and season. During the summer DEET usage accounts for almost 60% of all usage during a year, while during the winter months DEET usage accounts for <5%. Concerning spatial distribution, while per capita consumption of DEET in Florida is three times higher than the one observed in Arizona (44 g vs 14 g), DEET concentrations in wastewater tend to be much higher in Arizona. Regardless of WWTPs or monitoring period, concentrations as high as 15,200 ng/L were observed during the month of October 2016. While DEET has a diurnal variation in the wastewater influent, with a maximum at 18:00, the diurnal variability is not enough to explain the great discrepancies between consumption of DEET versus occurrence in wastewaters. Although LC-MS/MS analysis of isobaric and structural mimics suggests some possibility of interferences, NMR spectroscopy analysis of environmental samples does not support the presence of such mimics in real samples. |
| first_indexed | 2024-10-01T03:10:41Z |
| format | Journal Article |
| id | ntu-10356/90320 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:10:41Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/903202020-09-26T21:58:21Z DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection Marques dos Santos, Mauricius Hoppe-Jones, Christiane Snyder, Shane Allen Nanyang Environment and Water Research Institute DEET Diethyltoluamide Science::Geology DEET (N, N-diethyl-m-toluamide) is one of the most frequently detected trace organic contaminants (TOrC) in wastewaters and is used primarily as an insect repellent. It was introduced for use in the general public in 1957. It is ubiquitously present in the environment and DEET concentrations are usually among the highest reported for TOrCs. Due to recent concerns about possible analytical interferences in detection methods being reported, this study focused on possible artifacts caused by seasonal, spatial, and diurnal variations in wastewater influent concentration of DEET. We also compared usage data to observed wastewater concentrations of seven wastewater treatment plants (WWTPs) in four different regions in the US monitored from November 2014 to November 2016. Consumption data obtained reveal patterns of consumption according to climatic regions and season. During the summer DEET usage accounts for almost 60% of all usage during a year, while during the winter months DEET usage accounts for <5%. Concerning spatial distribution, while per capita consumption of DEET in Florida is three times higher than the one observed in Arizona (44 g vs 14 g), DEET concentrations in wastewater tend to be much higher in Arizona. Regardless of WWTPs or monitoring period, concentrations as high as 15,200 ng/L were observed during the month of October 2016. While DEET has a diurnal variation in the wastewater influent, with a maximum at 18:00, the diurnal variability is not enough to explain the great discrepancies between consumption of DEET versus occurrence in wastewaters. Although LC-MS/MS analysis of isobaric and structural mimics suggests some possibility of interferences, NMR spectroscopy analysis of environmental samples does not support the presence of such mimics in real samples. Published version 2019-09-17T05:31:18Z 2019-12-06T17:45:39Z 2019-09-17T05:31:18Z 2019-12-06T17:45:39Z 2019 Journal Article Marques dos Santos, M., Hoppe-Jones, C., & Snyder, S. A. (2019). DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection. Environment International, 132, 105038-. doi:10.1016/j.envint.2019.105038 0160-4120 https://hdl.handle.net/10356/90320 http://hdl.handle.net/10220/49947 10.1016/j.envint.2019.105038 en Environment International © 2019 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license. (http://creativecommons.org/licenses/BY-NC-ND/4.0/). 9 p. application/pdf |
| spellingShingle | DEET Diethyltoluamide Science::Geology Marques dos Santos, Mauricius Hoppe-Jones, Christiane Snyder, Shane Allen DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection |
| title | DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection |
| title_full | DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection |
| title_fullStr | DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection |
| title_full_unstemmed | DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection |
| title_short | DEET occurrence in wastewaters : Seasonal, spatial and diurnal variability - mismatches between consumption data and environmental detection |
| title_sort | deet occurrence in wastewaters seasonal spatial and diurnal variability mismatches between consumption data and environmental detection |
| topic | DEET Diethyltoluamide Science::Geology |
| url | https://hdl.handle.net/10356/90320 http://hdl.handle.net/10220/49947 |
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