Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022
The accumulation of heavy metals (HMs) in lakes can pose a serious risk to aquatic ecosystems. Caohai Lake is the largest plateau freshwater lake in Guizhou Province, China. However, the spatial and temporal dynamics and ecological risks of HM contamination in Caohai sediments in recent years remain...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Arabian Journal of Chemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535223010055 |
| _version_ | 1797356117763817472 |
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| author | Dianpeng Li Zhengjie Zhu Xuecheng Cao Tangwu Yang Shuqing An |
| author_facet | Dianpeng Li Zhengjie Zhu Xuecheng Cao Tangwu Yang Shuqing An |
| author_sort | Dianpeng Li |
| collection | DOAJ |
| description | The accumulation of heavy metals (HMs) in lakes can pose a serious risk to aquatic ecosystems. Caohai Lake is the largest plateau freshwater lake in Guizhou Province, China. However, the spatial and temporal dynamics and ecological risks of HM contamination in Caohai sediments in recent years remain unclear. Here, we analyzed the HM content of sediments in Caohai Lake in 2022 and collected historical (2011–2021) data from published articles to explore the spatiotemporal distribution characteristics, toxicity risks and potential sources of HMs. The mean concentrations (2011–2022) of Ni, As, Cd, Zn, Hg and Pb in the Caohai Lake sediments were all higher than the background values, and the values of As (32.0 mg/kg), Cd (14.19 mg/kg), Pb (87.6 mg/kg) and Zn (406.2 mg/kg) were 1.9, 4.0, 2.4 and 1.3 times their probable effect level (PEL) values, respectively. Sediment As and Cd concentrations in Caohai Lake showed significant decreasing and increasing trends from 2011 to 2022, with mutation points occurring in 2018 and 2020, respectively. The Caohai Lake sediment aquatic life risk index (TRI) for HMs showed a gradual increase until 2019, when it reached a sudden change point, leading to a very high toxicity risk in 2020, with Cd contributing the most to the TRI (43.66). Cd, Pb and Zn, the main pollutants in the sediments of Caohai Lake, originate from traffic, mining and agricultural sources. Our integrated results demonstrated the severity of HM pollution in Caohai Lake and can be helpful for formulating reasonable pollution prevention and control measures. |
| first_indexed | 2024-03-08T14:21:00Z |
| format | Article |
| id | doaj.art-4d5340b41c4b4a46bdc430d968bb95d2 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-03-08T14:21:00Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-4d5340b41c4b4a46bdc430d968bb95d22024-01-14T05:37:53ZengElsevierArabian Journal of Chemistry1878-53522024-02-01172105543Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022Dianpeng Li0Zhengjie Zhu1Xuecheng Cao2Tangwu Yang3Shuqing An4School of Life Sciences, Nanjing University, Nanjing 210046, Jiangsu, ChinaNanjing University Ecological Research Institute of Changshu, Suzhou 215500, Jiangsu, ChinaSchool of Life Sciences, Nanjing University, Nanjing 210046, Jiangsu, ChinaSchool of Life Sciences, Nanjing University, Nanjing 210046, Jiangsu, ChinaSchool of Life Sciences, Nanjing University, Nanjing 210046, Jiangsu, China; Nanjing University Ecological Research Institute of Changshu, Suzhou 215500, Jiangsu, China; Corresponding author at: School of Life Sciences, Nanjing University, Nanjing 210046, Jiangsu, China.The accumulation of heavy metals (HMs) in lakes can pose a serious risk to aquatic ecosystems. Caohai Lake is the largest plateau freshwater lake in Guizhou Province, China. However, the spatial and temporal dynamics and ecological risks of HM contamination in Caohai sediments in recent years remain unclear. Here, we analyzed the HM content of sediments in Caohai Lake in 2022 and collected historical (2011–2021) data from published articles to explore the spatiotemporal distribution characteristics, toxicity risks and potential sources of HMs. The mean concentrations (2011–2022) of Ni, As, Cd, Zn, Hg and Pb in the Caohai Lake sediments were all higher than the background values, and the values of As (32.0 mg/kg), Cd (14.19 mg/kg), Pb (87.6 mg/kg) and Zn (406.2 mg/kg) were 1.9, 4.0, 2.4 and 1.3 times their probable effect level (PEL) values, respectively. Sediment As and Cd concentrations in Caohai Lake showed significant decreasing and increasing trends from 2011 to 2022, with mutation points occurring in 2018 and 2020, respectively. The Caohai Lake sediment aquatic life risk index (TRI) for HMs showed a gradual increase until 2019, when it reached a sudden change point, leading to a very high toxicity risk in 2020, with Cd contributing the most to the TRI (43.66). Cd, Pb and Zn, the main pollutants in the sediments of Caohai Lake, originate from traffic, mining and agricultural sources. Our integrated results demonstrated the severity of HM pollution in Caohai Lake and can be helpful for formulating reasonable pollution prevention and control measures.http://www.sciencedirect.com/science/article/pii/S1878535223010055Spatiotemporal distributionPlateau lakesHeavy metal pollutionRisk assessmentData integration |
| spellingShingle | Dianpeng Li Zhengjie Zhu Xuecheng Cao Tangwu Yang Shuqing An Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022 Arabian Journal of Chemistry Spatiotemporal distribution Plateau lakes Heavy metal pollution Risk assessment Data integration |
| title | Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022 |
| title_full | Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022 |
| title_fullStr | Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022 |
| title_full_unstemmed | Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022 |
| title_short | Increasing trends in heavy metal risks in the Caohai Lake sediments from 2011 to 2022 |
| title_sort | increasing trends in heavy metal risks in the caohai lake sediments from 2011 to 2022 |
| topic | Spatiotemporal distribution Plateau lakes Heavy metal pollution Risk assessment Data integration |
| url | http://www.sciencedirect.com/science/article/pii/S1878535223010055 |
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