Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic matters
The black-odor water body restoration is an unfinished business in protecting and maintaining the ecological functions of natural water systems in China. Magnetic coagulation (MC) had found a vast application prospect for its high-efficient separation. In this work, the performance of MC was analyze...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-01-01
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| Series: | Water Cycle |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666445322000228 |
| _version_ | 1797377867551604736 |
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| author | Libing Zheng Heqing Zhang Chenlu Li Zhenjun Wu Jinqi Yu Hui Xu Meixue Chen Yuansong Wei |
| author_facet | Libing Zheng Heqing Zhang Chenlu Li Zhenjun Wu Jinqi Yu Hui Xu Meixue Chen Yuansong Wei |
| author_sort | Libing Zheng |
| collection | DOAJ |
| description | The black-odor water body restoration is an unfinished business in protecting and maintaining the ecological functions of natural water systems in China. Magnetic coagulation (MC) had found a vast application prospect for its high-efficient separation. In this work, the performance of MC was analyzed to explore its role in natural water protection, with a focus on identification and removal mechanisms of the dissolved organic matters (DOM) by absorption and fluorescence spectroscopy in terms of the spectroscopic indices, two-dimensional correlation spectroscopy (2D-COS), and parallel factor analysis (PARAFAC) methods. MC presented an excellent performance for suspended and colloidal matters, phosphorus, and DOMs, and showed high adaptability in pollution interception and water restoration. Tryptophan-like, tyrosine-like, and humics were identified as the key components in the wastewater, which were mainly recently produced or microbial-derived. The targeted pollutants were DOMs with high molecular weight, hydrophobicity, polarity, and aromaticity for the high affinity with the hydrolyzed Al species. Polyaluminum chloride (PAC) was the key in dissolved pollutants removal, while the mix stage is crucial for DOMs with low MW or humic-like substances as PAM facilitated the flocs formation and the absorption process. However, the residual PAM and the redissolved DOMs from the recycled magnetic seeds also act as the DOM source. This work identified the DOM composition and removal mechanism in MC, which would promote its application in natural water protection. |
| first_indexed | 2024-03-08T19:58:35Z |
| format | Article |
| id | doaj.art-cce7762d06cc4871b1e8aca7b370c105 |
| institution | Directory Open Access Journal |
| issn | 2666-4453 |
| language | English |
| last_indexed | 2024-03-08T19:58:35Z |
| publishDate | 2023-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Water Cycle |
| spelling | doaj.art-cce7762d06cc4871b1e8aca7b370c1052023-12-24T04:46:44ZengKeAi Communications Co., Ltd.Water Cycle2666-44532023-01-014111Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic mattersLibing Zheng0Heqing Zhang1Chenlu Li2Zhenjun Wu3Jinqi Yu4Hui Xu5Meixue Chen6Yuansong Wei7State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Lehrstuhl für Technische Chemie II and Center for Water and Environmental Research (ZWU), Universität Duisburg-Essen, 45117, Essen, GermanySCIMEE Science and Technology, China State Construction Engineering Corporation, Chengdu, 610045, ChinaLaboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, ChinaSCIMEE Science and Technology, China State Construction Engineering Corporation, Chengdu, 610045, ChinaSCIMEE Science and Technology, China State Construction Engineering Corporation, Chengdu, 610045, ChinaState Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, ChinaState Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Corresponding author. 18th Shuangqing Road, Haidian District, Beijing, 100085, China.State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Corresponding author. 18th Shuangqing Road, Haidian District, Beijing, 100085, China.The black-odor water body restoration is an unfinished business in protecting and maintaining the ecological functions of natural water systems in China. Magnetic coagulation (MC) had found a vast application prospect for its high-efficient separation. In this work, the performance of MC was analyzed to explore its role in natural water protection, with a focus on identification and removal mechanisms of the dissolved organic matters (DOM) by absorption and fluorescence spectroscopy in terms of the spectroscopic indices, two-dimensional correlation spectroscopy (2D-COS), and parallel factor analysis (PARAFAC) methods. MC presented an excellent performance for suspended and colloidal matters, phosphorus, and DOMs, and showed high adaptability in pollution interception and water restoration. Tryptophan-like, tyrosine-like, and humics were identified as the key components in the wastewater, which were mainly recently produced or microbial-derived. The targeted pollutants were DOMs with high molecular weight, hydrophobicity, polarity, and aromaticity for the high affinity with the hydrolyzed Al species. Polyaluminum chloride (PAC) was the key in dissolved pollutants removal, while the mix stage is crucial for DOMs with low MW or humic-like substances as PAM facilitated the flocs formation and the absorption process. However, the residual PAM and the redissolved DOMs from the recycled magnetic seeds also act as the DOM source. This work identified the DOM composition and removal mechanism in MC, which would promote its application in natural water protection.http://www.sciencedirect.com/science/article/pii/S2666445322000228Magnetic coagulationDOMBlack-odor waterWater body restoration2D-COS3D-EEM |
| spellingShingle | Libing Zheng Heqing Zhang Chenlu Li Zhenjun Wu Jinqi Yu Hui Xu Meixue Chen Yuansong Wei Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic matters Water Cycle Magnetic coagulation DOM Black-odor water Water body restoration 2D-COS 3D-EEM |
| title | Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic matters |
| title_full | Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic matters |
| title_fullStr | Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic matters |
| title_full_unstemmed | Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic matters |
| title_short | Roles of magnetic coagulation in black-odor water restoration: An insight into dissolved organic matters |
| title_sort | roles of magnetic coagulation in black odor water restoration an insight into dissolved organic matters |
| topic | Magnetic coagulation DOM Black-odor water Water body restoration 2D-COS 3D-EEM |
| url | http://www.sciencedirect.com/science/article/pii/S2666445322000228 |
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