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Solid–liquid partitioning and variation of palladium in rainfall runoff

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Abstract

Palladium (Pd) is most widely used in the production of automotive catalytic converters that serve to reduce toxic emissions from motor vehicles. The aim of this study was to analyze the solid–liquid partitioning and dynamic variation of Pd in rainfall runoff. The results showed that the partition coefficients (K) of Pd ranged from 0.05 to 8.55. Transport via suspended particulate matter as the main carrier was the main form of Pd migration in rainfall runoff. Pd phase distribution exhibited complex dynamic variations. The variation in Pd could be roughly divided into three categories, namely the W, M and N types, and the semi-U type was also observed. Rainfall characteristics and microenvironmental factors had a profound effect on Pd phase distribution in the first flush runoff. Under the influence of multifactor coupling, the impact of water quality parameters such as pH, Eh and Cl on Pd partitioning was significantly weakened.

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Data availability

Since the data are completed by the cooperation of many scholars, the data set generated and/or analyzed in the current research process cannot be publicly obtained, but is available from the corresponding author on reasonable request.

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Acknowledgements

We thank the 2017 undergraduates at the College of Geography and Environmental Science, Hainan Normal University, Youpeng Si, Yonghang Fan, Jie Zhang, Xinyue Wang, Mengyuan Jiang and other students, who helped complete the sampling work.

Funding

This work was supported by the National Natural Science Foundation of China (41867060). Funding agencies provided complete sampling experimental conditions for the data in the manuscript, designed manuscript research ideas and edited the manuscript.

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Contributions

HL analyzed and interpreted the relevant pollutant data and was a major contributor in writing the manuscript. FD provided a general framework and financial support. YL provided manuscript comments and reference suggestions. LZ provided experimental test methods. DW provided test venues and experimental equipment. All authors read and approved the final manuscript.

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Correspondence to Yuyan Liu.

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My manuscript does not contain data from any individual person. “Not applicable” in this section.

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My manuscript does not report on or involve the use of any animal or human data or tissue. “Not applicable” in this section.

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Liu, H., Ding, F., Liu, Y. et al. Solid–liquid partitioning and variation of palladium in rainfall runoff. Environ Geochem Health 44, 2407–2417 (2022). https://doi.org/10.1007/s10653-021-01032-8

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  • DOI: https://doi.org/10.1007/s10653-021-01032-8

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