Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze River
The plain area of the middle reaches of the Yangtze River is faced with a series of serious geological environment problems, among which the groundwater ammonium and phosphorus are the most abnormal, but the understanding of their coexistence is still very weak.In this paper, the hydrogeochemical an...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Bulletin of Geological Science and Technology
2022-01-01
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| Series: | 地质科技通报 |
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| Online Access: | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0021 |
| _version_ | 1797277520455794688 |
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| author | Zhichao Leng Yao Du Yanqiu Tao Yanwen Huang Yamin Deng |
| author_facet | Zhichao Leng Yao Du Yanqiu Tao Yanwen Huang Yamin Deng |
| author_sort | Zhichao Leng |
| collection | DOAJ |
| description | The plain area of the middle reaches of the Yangtze River is faced with a series of serious geological environment problems, among which the groundwater ammonium and phosphorus are the most abnormal, but the understanding of their coexistence is still very weak.In this paper, the hydrogeochemical analysis was carried out on the groundwater samples collected from the oxbows along the middle reaches of the Yangtze River, and the occurrence rules of ammonium and phosphorus were discussed by means of factor analysis and random forest model.The results showed that: Groundwater is in reductive environment as a whole, the mass concentration of NH4-N is 0.03-71.0 mg/L(the mean is 9.92 mg/L), and the mass concentration of P is 0.02-3.38 mg/L(the mean is 0.51 mg/L).High concentration of ammonium and phosphorus in groundwater are mainly from natural causes.However, the migration and enrichment processes of ammonium and phosphorus are different.The migration and enrichment of ammonium is closely related to the mineralization process of organic matter.The migration and enrichment of phosphorus is closely related to the reductive dissolution of iron oxide/hydroxide, and the mineralization of organic matter containing phosphorus is the secondary process of phosphorus enrichment.A low Eh groundwater environment is prone to produce high ammonium groundwater, while a relatively medium reduction environment will produce high phosphorus but usually not associated with high ammonium nitrogen.When S2-, DOC and I are in relatively high concentrations, a large amount of ammonium is associated, while the concentration of phosphorus is largely controlled by the concentration of Fe2+.When DOC, I, and Fe2+ are all high, high concentrations of ammonium and phosphorus are usually present. |
| first_indexed | 2024-03-07T15:49:36Z |
| format | Article |
| id | doaj.art-ab1bc8adea714e98850a44bc43d7af25 |
| institution | Directory Open Access Journal |
| issn | 2096-8523 |
| language | zho |
| last_indexed | 2024-03-07T15:49:36Z |
| publishDate | 2022-01-01 |
| publisher | Editorial Department of Bulletin of Geological Science and Technology |
| record_format | Article |
| series | 地质科技通报 |
| spelling | doaj.art-ab1bc8adea714e98850a44bc43d7af252024-03-05T03:02:34ZzhoEditorial Department of Bulletin of Geological Science and Technology地质科技通报2096-85232022-01-0141130030810.19509/j.cnki.dzkq.2022.0021dzkjtb-41-1-300Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze RiverZhichao Leng0Yao Du1Yanqiu Tao2Yanwen Huang3Yamin Deng4School of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, ChinaSchool of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, ChinaSchool of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, ChinaSchool of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, ChinaSchool of Environmental Studies, China University of Geosciences(Wuhan), Wuhan 430078, ChinaThe plain area of the middle reaches of the Yangtze River is faced with a series of serious geological environment problems, among which the groundwater ammonium and phosphorus are the most abnormal, but the understanding of their coexistence is still very weak.In this paper, the hydrogeochemical analysis was carried out on the groundwater samples collected from the oxbows along the middle reaches of the Yangtze River, and the occurrence rules of ammonium and phosphorus were discussed by means of factor analysis and random forest model.The results showed that: Groundwater is in reductive environment as a whole, the mass concentration of NH4-N is 0.03-71.0 mg/L(the mean is 9.92 mg/L), and the mass concentration of P is 0.02-3.38 mg/L(the mean is 0.51 mg/L).High concentration of ammonium and phosphorus in groundwater are mainly from natural causes.However, the migration and enrichment processes of ammonium and phosphorus are different.The migration and enrichment of ammonium is closely related to the mineralization process of organic matter.The migration and enrichment of phosphorus is closely related to the reductive dissolution of iron oxide/hydroxide, and the mineralization of organic matter containing phosphorus is the secondary process of phosphorus enrichment.A low Eh groundwater environment is prone to produce high ammonium groundwater, while a relatively medium reduction environment will produce high phosphorus but usually not associated with high ammonium nitrogen.When S2-, DOC and I are in relatively high concentrations, a large amount of ammonium is associated, while the concentration of phosphorus is largely controlled by the concentration of Fe2+.When DOC, I, and Fe2+ are all high, high concentrations of ammonium and phosphorus are usually present.https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0021groundwaterammoniumphosphorusorganic matteriron oxide |
| spellingShingle | Zhichao Leng Yao Du Yanqiu Tao Yanwen Huang Yamin Deng Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze River 地质科技通报 groundwater ammonium phosphorus organic matter iron oxide |
| title | Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze River |
| title_full | Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze River |
| title_fullStr | Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze River |
| title_full_unstemmed | Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze River |
| title_short | Coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the Yangtze River |
| title_sort | coexistence and controlling factors of ammonium and phosphorus in groundwater along the middle reaches of the yangtze river |
| topic | groundwater ammonium phosphorus organic matter iron oxide |
| url | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0021 |
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