Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination
Different groups of disinfection by-products (DBPs) were studied through the degradation of iopamidol by the sequential oxidation process of ozone-low pressure ultraviolet light (O3-LPUV) followed by chlorination. This paper investigates the attenuation of iopamidol under this sequential treatment a...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2022
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| Online Access: | https://hdl.handle.net/10356/159690 |
| _version_ | 1826113335955816448 |
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| author | Lopez-Prieto, Israel J. Park, Minkyu AzadiAghdam, Mojtaba Pan, Hongrui Jones, Sara L. Snyder, Shane Allen |
| author2 | Nanyang Environment and Water Research Institute |
| author_facet | Nanyang Environment and Water Research Institute Lopez-Prieto, Israel J. Park, Minkyu AzadiAghdam, Mojtaba Pan, Hongrui Jones, Sara L. Snyder, Shane Allen |
| author_sort | Lopez-Prieto, Israel J. |
| collection | NTU |
| description | Different groups of disinfection by-products (DBPs) were studied through the degradation of iopamidol by the sequential oxidation process of ozone-low pressure ultraviolet light (O3-LPUV) followed by chlorination. This paper investigates the attenuation of iopamidol under this sequential treatment and the effect of chlorine contact time (30 min versus 3 days) to control the formation potential of DBPs: trihalomethanes (THMs), haloacetonitriles (HANs) and haloacetamides (HAMs). Thirty target DBPs among the 9 iodinated-DBPs (I-DBPs), were monitored throughout the sequential treatment. Results showed that O3-LPUV removed up to 99% of iopamidol, while ozone and LPUV alone removed only 90% and 76% respectively. After chlorine addition, O3-LPUV yielded 56% lower I-DBPs than LPUV. Increasing chlorine contact time resulted in higher concentrations of all DBP groups (THMs, HANs, and HAMs), with the exception of I-DBPs. One new iodinated-haloacetamide, namely chloroiodoacetamide (CIACM) and one iodoacetonitrile (IACN) were detected. These results suggest the iodine incorporated in iopamidol may be a precursor for iodinated-nitrogenous-DBPs, which are currently not well studied. |
| first_indexed | 2024-10-01T03:21:32Z |
| format | Journal Article |
| id | ntu-10356/159690 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:21:32Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1596902022-06-29T04:22:29Z Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination Lopez-Prieto, Israel J. Park, Minkyu AzadiAghdam, Mojtaba Pan, Hongrui Jones, Sara L. Snyder, Shane Allen Nanyang Environment and Water Research Institute Engineering::Environmental engineering Pre-Ozonation UV Photolysis Different groups of disinfection by-products (DBPs) were studied through the degradation of iopamidol by the sequential oxidation process of ozone-low pressure ultraviolet light (O3-LPUV) followed by chlorination. This paper investigates the attenuation of iopamidol under this sequential treatment and the effect of chlorine contact time (30 min versus 3 days) to control the formation potential of DBPs: trihalomethanes (THMs), haloacetonitriles (HANs) and haloacetamides (HAMs). Thirty target DBPs among the 9 iodinated-DBPs (I-DBPs), were monitored throughout the sequential treatment. Results showed that O3-LPUV removed up to 99% of iopamidol, while ozone and LPUV alone removed only 90% and 76% respectively. After chlorine addition, O3-LPUV yielded 56% lower I-DBPs than LPUV. Increasing chlorine contact time resulted in higher concentrations of all DBP groups (THMs, HANs, and HAMs), with the exception of I-DBPs. One new iodinated-haloacetamide, namely chloroiodoacetamide (CIACM) and one iodoacetonitrile (IACN) were detected. These results suggest the iodine incorporated in iopamidol may be a precursor for iodinated-nitrogenous-DBPs, which are currently not well studied. 2022-06-29T04:22:29Z 2022-06-29T04:22:29Z 2021 Journal Article Lopez-Prieto, I. J., Park, M., AzadiAghdam, M., Pan, H., Jones, S. L. & Snyder, S. A. (2021). Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination. Chemosphere, 278, 130394-. https://dx.doi.org/10.1016/j.chemosphere.2021.130394 0045-6535 https://hdl.handle.net/10356/159690 10.1016/j.chemosphere.2021.130394 34126675 2-s2.0-85104051232 278 130394 en Chemosphere © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Pre-Ozonation UV Photolysis Lopez-Prieto, Israel J. Park, Minkyu AzadiAghdam, Mojtaba Pan, Hongrui Jones, Sara L. Snyder, Shane Allen Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination |
| title | Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination |
| title_full | Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination |
| title_fullStr | Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination |
| title_full_unstemmed | Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination |
| title_short | Formation and control of disinfection by-products from iodinated contrast media attenuation through sequential treatment processes of ozone-low pressure ultraviolet light followed by chlorination |
| title_sort | formation and control of disinfection by products from iodinated contrast media attenuation through sequential treatment processes of ozone low pressure ultraviolet light followed by chlorination |
| topic | Engineering::Environmental engineering Pre-Ozonation UV Photolysis |
| url | https://hdl.handle.net/10356/159690 |
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