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Distribution and assessment of cadmium contamination in sediments from the Four River inlets to Dongting Lake, China

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Abstract

The total concentrations of Cd in bulk sediments and those of the BCR sequential extraction fractions of sediments from inlets of the Four Rivers that feed Dongting Lake were determined using ICP-MS techniques. The results suggested that Cd was heterogeneously distributed in the inlet sediments of the rivers, with the highest degree of enrichment in sediments from the Xiangjiang River. The Cd anomaly was defined as Cd enrichment in sediments with an EF (enrichment factor) > 10.0, and it was identified in the inlet sediments of the Xiangjiang River. Cd in the sediments was dominated by acid-soluble Cd at a proportion of 23.9–69.8 (%) compared to its total concentrations in the sediments. The inlet sediments of the Four Rivers were contaminated with Cd, with the highest degree of contamination in the inlet sediments of the Xiangjiang River. The Cd contamination as well as the Cd anomaly in the sediments were closely related to the industrial activities (e.g. smelting and refining for ore minerals) in the areas, and Cd contamination at high levels may represent an ecological risk for the lake watershed. Cd contamination of the inlet sediments may also impact the lake basin sediments and is harmful to the lake ecological system, particularly for sediments of the Xiangjiang River. Therefore, it is essential to control and treat Cd contamination in the inlet sediments for ecological environmental protection of lake watersheds.

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All data generated or analysed during this study are included in this published article (and its supplementary information files).

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Acknowledgements

Mr. Tu Xianglin at the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, is thanked for his help with the ICP-MS analysis.

Funding

The work was financially supported by the Construction Program for First-Class Disciplines (Geography) of Hunan Province and the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province (2014), China. Part of the work was also supported by the National Scientific Foundation Committee of China (Grant No. 41073095).

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Bo Peng, Sicheng Wu: Ideas; formulation or evolution of overarching research goals and aims.

Sicheng Wu, Bo Peng, Xiaohong Fang, Shurong Xie, Xiaomin Li, Chunxia Jiang, Yanan Dai: Management activities to annotate (produce metadata), scrub data, and maintain research data (including software code, where it is necessary for interpreting the data itself) for initial use and later re-use. Application of statistical, mathematical, computational, or other formal techniques to analyse or synthesize study data. Provision of study materials, reagents, materials, patients, laboratory samples, animals, instrumentation, computing resources, or other analysis tools. Programming, software development; designing computer programs; implementation of the computer code and supporting algorithms; testing of existing code components. Verification, whether as a part of the activity or separate, of the overall replication/reproducibility of results/experiments and other research outputs. Preparation, creation, and/or presentation of the published work, specifically visualization/data presentation.

Bo Peng: Acquisition of the financial support for the project leading to this publication. Conducting a research and investigation process, specifically performing the experiments, or data/evidence collection. Management and coordination responsibility for the research activity planning and execution. Oversight and leadership responsibility for the research activity planning and execution, including mentorship external to the core team.

Sicheng Wu: Development or design of methodology; creation of models.

Bo Peng, Sicheng Wu: Preparation, creation, and/or presentation of the published work, specifically writing the initial draft (including substantive translation). Preparation, creation, and/or presentation of the published work by those from the original research group, specifically critical review, commentary, or revision—including pre- or post-publication stages.

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Correspondence to Bo Peng.

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Wu, ., Peng, B., Fang, X. et al. Distribution and assessment of cadmium contamination in sediments from the Four River inlets to Dongting Lake, China. Environ Sci Pollut Res 28, 66072–66085 (2021). https://doi.org/10.1007/s11356-021-15636-1

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  • DOI: https://doi.org/10.1007/s11356-021-15636-1

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