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Effects of Flooding on Changes in Eh, pH and Speciation of Cadmium and Lead in Contaminated Soil

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Abstract

Artificially contaminated soils (A, B) and naturally contaminated soil (S2) in China were used as the tested soils, and the effect of continuous flooding on the changes of Eh, pH and the speciation of cadmium, lead in contaminated soils was studied in the paper. The results indicated that soil Eh decreased with flooding time, and that soil pH increased with flooding time. The changes of soil pH ceased after 60 days of submergence. The exchangeable Cd and Pb decreased obviously during the flooding process from the results of five-step sequential extraction. The calculations of mobility factor (MF) showed that Cd mobility significantly decreased in artificially contaminated soils (A, B) after the flood. But the change of Pb mobility was not significant after the flood, although a decrease of Pb concentration in the exchangeable fraction (SE) was observed.

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Acknowledgments

The author acknowledges the financial support from the Natural Science Foundation of China (approved No. 20477029) and the National key basic research program (973) of China (No. 2004CB418506).

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Authors and Affiliations

  1. Key Laboratory of Environment Engineering of Shenyang University, Shenyang, 110044, China

    Lina Sun, Su Chen & Tieheng Sun

  2. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China

    Su Chen, Lei Chao & Tieheng Sun

  3. Graduate School of Chinese Academy of Sciences, Beijing, 100039, China

    Su Chen & Lei Chao

Authors
  1. Lina Sun
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  2. Su Chen
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  3. Lei Chao
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  4. Tieheng Sun
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Correspondence to Su Chen.

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Sun, L., Chen, S., Chao, L. et al. Effects of Flooding on Changes in Eh, pH and Speciation of Cadmium and Lead in Contaminated Soil. Bull Environ Contam Toxicol 79, 514–518 (2007). https://doi.org/10.1007/s00128-007-9274-8

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  • DOI: https://doi.org/10.1007/s00128-007-9274-8

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