Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South China
In this study, the historical variation (210Pb dating) and distribution of toxic trace metals in sediments of the Nanliu River Estuary (NRE) were studied to understand the spatiotemporal variation therein and related risks. Geochemical fractions of trace metals (Pb, Cu, Cr, Zn, and Ni) were also ana...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Ecological Indicators |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1470160X22011815 |
| _version_ | 1828293019752726528 |
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| author | Jingru Zhang Liping Mo Xingyuan Li Ying Zhu Baoqing Hu Lulu Zhang |
| author_facet | Jingru Zhang Liping Mo Xingyuan Li Ying Zhu Baoqing Hu Lulu Zhang |
| author_sort | Jingru Zhang |
| collection | DOAJ |
| description | In this study, the historical variation (210Pb dating) and distribution of toxic trace metals in sediments of the Nanliu River Estuary (NRE) were studied to understand the spatiotemporal variation therein and related risks. Geochemical fractions of trace metals (Pb, Cu, Cr, Zn, and Ni) were also analyzed using the fractionation technique. The results suggested that the concentrations of trace metals are higher in the western part of the estuary, and that Pb was significantly enriched. The NRE has experienced rapid economic development during the past four decades, but a decreasing trend of trace metals content after 2000 was observed. This may be due to effective implementation of national environmental control measures. Zn, Ni, Cr, Cu, and Pb in the surface sediments of the NRE exist mainly in residual form. The order of trace metals based on the risk assessment code (RAC) is Zn > Cu > Ni > Pb > Cr. According to enrichment factor (EF) and geo-accumulation index (Igeo) values, Hg, As, and Pb in the sediment of the NRE cause moderate levels of pollution and require attention. Based on the geochemical method, anthropogenic contributions of Cd, Zn, Pb, and Cu in the sediments of the NRE exceeded 50 % after 1980, possibly corresponding to the rapid industrial development and economic growth in the NRE resulting from the “reform and opening up”. |
| first_indexed | 2024-04-13T11:17:15Z |
| format | Article |
| id | doaj.art-03814a55ecf64ed1ab88c3bfaf4a9377 |
| institution | Directory Open Access Journal |
| issn | 1470-160X |
| language | English |
| last_indexed | 2024-04-13T11:17:15Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecological Indicators |
| spelling | doaj.art-03814a55ecf64ed1ab88c3bfaf4a93772022-12-22T02:48:55ZengElsevierEcological Indicators1470-160X2022-12-01145109708Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South ChinaJingru Zhang0Liping Mo1Xingyuan Li2Ying Zhu3Baoqing Hu4Lulu Zhang5College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; Guangdong Provincial Academy of Environmental Science, Guangzhou 510045, ChinaKey Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, and Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation of Nanning Normal University, Nanning 530001, ChinaCollege of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; Corresponding author.College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, ChinaKey Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education, and Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation of Nanning Normal University, Nanning 530001, ChinaGuangdong Provincial Academy of Environmental Science, Guangzhou 510045, ChinaIn this study, the historical variation (210Pb dating) and distribution of toxic trace metals in sediments of the Nanliu River Estuary (NRE) were studied to understand the spatiotemporal variation therein and related risks. Geochemical fractions of trace metals (Pb, Cu, Cr, Zn, and Ni) were also analyzed using the fractionation technique. The results suggested that the concentrations of trace metals are higher in the western part of the estuary, and that Pb was significantly enriched. The NRE has experienced rapid economic development during the past four decades, but a decreasing trend of trace metals content after 2000 was observed. This may be due to effective implementation of national environmental control measures. Zn, Ni, Cr, Cu, and Pb in the surface sediments of the NRE exist mainly in residual form. The order of trace metals based on the risk assessment code (RAC) is Zn > Cu > Ni > Pb > Cr. According to enrichment factor (EF) and geo-accumulation index (Igeo) values, Hg, As, and Pb in the sediment of the NRE cause moderate levels of pollution and require attention. Based on the geochemical method, anthropogenic contributions of Cd, Zn, Pb, and Cu in the sediments of the NRE exceeded 50 % after 1980, possibly corresponding to the rapid industrial development and economic growth in the NRE resulting from the “reform and opening up”.http://www.sciencedirect.com/science/article/pii/S1470160X22011815Trace metal210Pb datingNanliu RiverHistorical variationsRisk assessment |
| spellingShingle | Jingru Zhang Liping Mo Xingyuan Li Ying Zhu Baoqing Hu Lulu Zhang Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South China Ecological Indicators Trace metal 210Pb dating Nanliu River Historical variations Risk assessment |
| title | Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South China |
| title_full | Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South China |
| title_fullStr | Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South China |
| title_full_unstemmed | Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South China |
| title_short | Distribution, historical variations, and geochemical fractions of toxic trace metals and their ecological risks in sediments of the Nanliu River Estuary, South China |
| title_sort | distribution historical variations and geochemical fractions of toxic trace metals and their ecological risks in sediments of the nanliu river estuary south china |
| topic | Trace metal 210Pb dating Nanliu River Historical variations Risk assessment |
| url | http://www.sciencedirect.com/science/article/pii/S1470160X22011815 |
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