Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor
The release of nitrogen (N) and phosphorus (P) from coastal sediments is vital to the evolution of coastal water quality. In this study, the release of N and P from coastal sediments in a heavily polluted river was studied using single-factor experiments and sequential extraction of N and P from sed...
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IOP Publishing
2025-01-01
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| Series: | Environmental Research Communications |
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| Online Access: | https://doi.org/10.1088/2515-7620/adaf10 |
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| author | Nana Hu Yanqing Sheng Qi Tang Xiaozhu Liu |
| author_facet | Nana Hu Yanqing Sheng Qi Tang Xiaozhu Liu |
| author_sort | Nana Hu |
| collection | DOAJ |
| description | The release of nitrogen (N) and phosphorus (P) from coastal sediments is vital to the evolution of coastal water quality. In this study, the release of N and P from coastal sediments in a heavily polluted river was studied using single-factor experiments and sequential extraction of N and P from sediments. The experimental results showed that N and P from the coastal river sediments reached the release-absorption equilibrium after the 42nd and 14th day, respectively. The release of N and P from heavily polluted river sediments in coastal zones is affected by resuspension, salinity, dissolved oxygen, and temperature. The results showed that resuspension had the greatest impact on the release of N and P from heavily contaminated coastal river sediments into the overlying water. In addition, the release of P, NO _3 ^− and NO _2 ^− from sediments is most sensitive to changes in temperature, while the release of total N and NH _4 ^+ is most sensitive to changes in salinity. Unlike in lake sediments, high dissolved oxygen concentrations inhibit the release of NH _4 ^+ from extensively contaminated coastal sediments. Ion-exchangeable forms of N and inorganic P are the most susceptible to release from external environmental factors. These findings will aid in the management and control of heavily polluted coastal rivers. |
| format | Article |
| id | doaj-art-a828de9b167a43c6873a15912bfde639 |
| institution | Kabale University |
| issn | 2515-7620 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | Environmental Research Communications |
| spelling | doaj-art-a828de9b167a43c6873a15912bfde6392025-02-06T09:01:22ZengIOP PublishingEnvironmental Research Communications2515-76202025-01-017202500510.1088/2515-7620/adaf10Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factorNana Hu0https://orcid.org/0009-0007-2909-621XYanqing Sheng1Qi Tang2Xiaozhu Liu3State Environmental Protection Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation, Shandong Academy for Environmental Planning, Jinan, People’s Republic of China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, People’s Republic of China; University of Chinese Academy of Sciences , Beijing 100049, People’s Republic of ChinaState Environmental Protection Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation, Shandong Academy for Environmental Planning, Jinan, People’s Republic of China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, People’s Republic of ChinaState Environmental Protection Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation, Shandong Academy for Environmental Planning, Jinan, People’s Republic of China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, People’s Republic of ChinaState Environmental Protection Key Laboratory of Land and Sea Ecological Governance and Systematic Regulation, Shandong Academy for Environmental Planning, Jinan, People’s Republic of China; Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, People’s Republic of ChinaThe release of nitrogen (N) and phosphorus (P) from coastal sediments is vital to the evolution of coastal water quality. In this study, the release of N and P from coastal sediments in a heavily polluted river was studied using single-factor experiments and sequential extraction of N and P from sediments. The experimental results showed that N and P from the coastal river sediments reached the release-absorption equilibrium after the 42nd and 14th day, respectively. The release of N and P from heavily polluted river sediments in coastal zones is affected by resuspension, salinity, dissolved oxygen, and temperature. The results showed that resuspension had the greatest impact on the release of N and P from heavily contaminated coastal river sediments into the overlying water. In addition, the release of P, NO _3 ^− and NO _2 ^− from sediments is most sensitive to changes in temperature, while the release of total N and NH _4 ^+ is most sensitive to changes in salinity. Unlike in lake sediments, high dissolved oxygen concentrations inhibit the release of NH _4 ^+ from extensively contaminated coastal sediments. Ion-exchangeable forms of N and inorganic P are the most susceptible to release from external environmental factors. These findings will aid in the management and control of heavily polluted coastal rivers.https://doi.org/10.1088/2515-7620/adaf10coastal sedimentsheavily polluted riverN and P releaseinfluencing factorinternal source pollution |
| spellingShingle | Nana Hu Yanqing Sheng Qi Tang Xiaozhu Liu Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor Environmental Research Communications coastal sediments heavily polluted river N and P release influencing factor internal source pollution |
| title | Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor |
| title_full | Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor |
| title_fullStr | Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor |
| title_full_unstemmed | Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor |
| title_short | Mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor |
| title_sort | mechanisms of nitrogen and phosphorus release from heavily polluted coastal sediments and identification of influencing factor |
| topic | coastal sediments heavily polluted river N and P release influencing factor internal source pollution |
| url | https://doi.org/10.1088/2515-7620/adaf10 |
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