Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization
Lake sediments serve as a sink for trace elements and provide a record of watershed changes resulting from anthropogenic activities and natural processes. In this study, eight trace elements in the sediments of Lake Aha, an urban lake in Guiyang City, Southwest China, were investigated to reveal the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X23015649 |
| _version_ | 1797384132870799360 |
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| author | Hongnian Wang Qixin Wu Shilin Gao Xingyong Zhang Jie Zeng |
| author_facet | Hongnian Wang Qixin Wu Shilin Gao Xingyong Zhang Jie Zeng |
| author_sort | Hongnian Wang |
| collection | DOAJ |
| description | Lake sediments serve as a sink for trace elements and provide a record of watershed changes resulting from anthropogenic activities and natural processes. In this study, eight trace elements in the sediments of Lake Aha, an urban lake in Guiyang City, Southwest China, were investigated to reveal the effects of historical coal mining and rapid urbanization in the watershed. Results showed that the median contents of measured trace elements in order of Zn (220.00 mg/kg) > Ni (98.16 mg/kg) > Cr (70.26 mg/kg) > Cu (66.20 mg/kg) > As (58.14 mg/kg) > Co (41.66 mg/kg) > Pb (28.33 mg/kg) > Cd (1.39 mg/kg). Except for Cr and Pb, the median concentrations of Cd, As, Zn, Ni, Co, and Cu were 4.64, 2.33, 2.00, 1.92, 1.81, and 1.09 times higher than regional natural background values respectively. Trace element contents in sediments of the center of the lake were significantly higher than in the rest of the sediment cores, resulting from relatively stable hydrodynamic processes in the region. Vertical variation of trace elements indicated that the fluctuations in the intensity of coal mining activities in the tributaries were effectively tracked by variations of trace element levels in the middle layer sediments of the Youyu River and Baiyan River estuaries. The elevated concentrations of Pb in the surface sediments of the Jinzhong River estuary reflected the rapid urbanization in the basin over the past 20 years. PMF analysis demonstrated that As, Cd, and Pb in sediments were from a mixture of natural and urban activities, and Cu, Zn, Ni, and Co originated from coal mining. This study provides important information for comprehending the anthropogenic activities of small-scale lakes and historical environmental changes. |
| first_indexed | 2024-03-08T21:32:08Z |
| format | Article |
| id | doaj.art-599fe6a55e804e09805a0ce4c873007e |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-03-08T21:32:08Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-599fe6a55e804e09805a0ce4c873007e2023-12-21T07:29:49ZengElsevierEcological Indicators1470-160X2024-01-01158111422Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanizationHongnian Wang0Qixin Wu1Shilin Gao2Xingyong Zhang3Jie Zeng4Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China; College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550000, China; Corresponding author at: Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China.College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550000, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaKey Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China; College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550000, ChinaLake sediments serve as a sink for trace elements and provide a record of watershed changes resulting from anthropogenic activities and natural processes. In this study, eight trace elements in the sediments of Lake Aha, an urban lake in Guiyang City, Southwest China, were investigated to reveal the effects of historical coal mining and rapid urbanization in the watershed. Results showed that the median contents of measured trace elements in order of Zn (220.00 mg/kg) > Ni (98.16 mg/kg) > Cr (70.26 mg/kg) > Cu (66.20 mg/kg) > As (58.14 mg/kg) > Co (41.66 mg/kg) > Pb (28.33 mg/kg) > Cd (1.39 mg/kg). Except for Cr and Pb, the median concentrations of Cd, As, Zn, Ni, Co, and Cu were 4.64, 2.33, 2.00, 1.92, 1.81, and 1.09 times higher than regional natural background values respectively. Trace element contents in sediments of the center of the lake were significantly higher than in the rest of the sediment cores, resulting from relatively stable hydrodynamic processes in the region. Vertical variation of trace elements indicated that the fluctuations in the intensity of coal mining activities in the tributaries were effectively tracked by variations of trace element levels in the middle layer sediments of the Youyu River and Baiyan River estuaries. The elevated concentrations of Pb in the surface sediments of the Jinzhong River estuary reflected the rapid urbanization in the basin over the past 20 years. PMF analysis demonstrated that As, Cd, and Pb in sediments were from a mixture of natural and urban activities, and Cu, Zn, Ni, and Co originated from coal mining. This study provides important information for comprehending the anthropogenic activities of small-scale lakes and historical environmental changes.http://www.sciencedirect.com/science/article/pii/S1470160X23015649Lake sedimentsTrace elementsGeochemistryPositive matrix factorizationDeposition factors |
| spellingShingle | Hongnian Wang Qixin Wu Shilin Gao Xingyong Zhang Jie Zeng Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization Ecological Indicators Lake sediments Trace elements Geochemistry Positive matrix factorization Deposition factors |
| title | Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization |
| title_full | Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization |
| title_fullStr | Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization |
| title_full_unstemmed | Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization |
| title_short | Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization |
| title_sort | trace element of small lake sediments sensitively recorded environmental changes in the watershed implications for mining history and urbanization |
| topic | Lake sediments Trace elements Geochemistry Positive matrix factorization Deposition factors |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X23015649 |
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