Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role
Perfluorinated compounds (PFCs) are a group of bio-recalcitrant pollutants that remain in waste activated sludge and may subsequently be transferred with sludge to thermal hydrolysis pretreatment (THP) process. Instead of reduction, it is observed previously that the concentration of free PFCs eleva...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/169949 |
| _version_ | 1811695540625211392 |
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| author | Yan, Wangwang Song, Mengsha Zhou, Yan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Yan, Wangwang Song, Mengsha Zhou, Yan |
| author_sort | Yan, Wangwang |
| collection | NTU |
| description | Perfluorinated compounds (PFCs) are a group of bio-recalcitrant pollutants that remain in waste activated sludge and may subsequently be transferred with sludge to thermal hydrolysis pretreatment (THP) process. Instead of reduction, it is observed previously that the concentration of free PFCs elevated after THP. By employing perfluorooctanoic acid (PFOA) as a representative, this study developed a hierarchical scheme to pinpoint the key factors that contribute to free PFOA elevation from the complex sludge transformations. According to the results, the relative abundance of PFOA in the liquid phase increased by 11.7 - 22.9% during THP. In the solid phase, the amide groups reduction and the spatial structure change of proteins weakened the sorption capability of solids for PFOA. In the liquid phase, the increase of proteins, which could bind and form static hindrance to regulate the behavior of PFOA, was the main factor to retain PFOA in liquid. In contrast, other sludge transformations including changes in pH, zeta potential, ionic condition and specific surface area, displayed insignificant impact on the redistribution process. The study presents a detailed picture on how sludge transformations would regulate PFCs distribution that ultimately direct the selection of further treatment processes. |
| first_indexed | 2024-10-01T07:25:06Z |
| format | Journal Article |
| id | ntu-10356/169949 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:25:06Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1699492023-08-15T08:52:23Z Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role Yan, Wangwang Song, Mengsha Zhou, Yan School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Engineering::Environmental engineering Recalcitrant Pollutants Perfluorooctanoic Acid Perfluorinated compounds (PFCs) are a group of bio-recalcitrant pollutants that remain in waste activated sludge and may subsequently be transferred with sludge to thermal hydrolysis pretreatment (THP) process. Instead of reduction, it is observed previously that the concentration of free PFCs elevated after THP. By employing perfluorooctanoic acid (PFOA) as a representative, this study developed a hierarchical scheme to pinpoint the key factors that contribute to free PFOA elevation from the complex sludge transformations. According to the results, the relative abundance of PFOA in the liquid phase increased by 11.7 - 22.9% during THP. In the solid phase, the amide groups reduction and the spatial structure change of proteins weakened the sorption capability of solids for PFOA. In the liquid phase, the increase of proteins, which could bind and form static hindrance to regulate the behavior of PFOA, was the main factor to retain PFOA in liquid. In contrast, other sludge transformations including changes in pH, zeta potential, ionic condition and specific surface area, displayed insignificant impact on the redistribution process. The study presents a detailed picture on how sludge transformations would regulate PFCs distribution that ultimately direct the selection of further treatment processes. This work was partially supported by the Shenzhen Science and Technology Innovation Program [grant number JCYJ20220530145613031]. 2023-08-15T08:52:23Z 2023-08-15T08:52:23Z 2023 Journal Article Yan, W., Song, M. & Zhou, Y. (2023). Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role. Water Research, 241, 120135-. https://dx.doi.org/10.1016/j.watres.2023.120135 0043-1354 https://hdl.handle.net/10356/169949 10.1016/j.watres.2023.120135 37267707 2-s2.0-85161069339 241 120135 en Water Research © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Recalcitrant Pollutants Perfluorooctanoic Acid Yan, Wangwang Song, Mengsha Zhou, Yan Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role |
| title | Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role |
| title_full | Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role |
| title_fullStr | Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role |
| title_full_unstemmed | Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role |
| title_short | Redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis: location of protein plays a major role |
| title_sort | redistribution of perfluorooctanoic acid in sludge after thermal hydrolysis location of protein plays a major role |
| topic | Engineering::Environmental engineering Recalcitrant Pollutants Perfluorooctanoic Acid |
| url | https://hdl.handle.net/10356/169949 |
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