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Acid Volatile Sulfides and Simultaneously Extracted Metals in a Metal-Polluted Area of Taihu Lake, China

Abstract

There were similar distribution characteristics for acid volatile sulfides (AVS) and simultaneously extracted metals (SEM) in surface sediments, and the concentrations of AVS and SEM decreased from the deposition area to the center of the bay (lake). The ratio of AVS to SEM was <1 in the surface sediments, indicating that heavy metals in surface sediments may be bioavailable. The concentration of AVS increased with sediment depth, followed by a decrease with large variation, while the concentration of SEM remained constant. By comparing the concentration of SEM with total metals, it was shown that extracted Cu and Ni decreased with sediment depth, indicating increasing association of Cu and Ni with sulfides in deeper sediment layers. The lower extracted ratios for Pb and Zn compared with sulfidic sediment illustrated that AVS should not have strong control on sediment Pb and Zn. The molar ratio of AVS and reactive iron showed that heavy metals were dynamic and active in sediments in this lake.

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Acknowledgments

We thank professor Mark for their assistance. Financial was supported by the National Natural Science Foundation of China (40601087) and National High-Tech Research and Development Plan (2007AA06Z411).

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Correspondence to C. X. Fan.

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Yin, H.B., Fan, C.X., Ding, S.M. et al. Acid Volatile Sulfides and Simultaneously Extracted Metals in a Metal-Polluted Area of Taihu Lake, China. Bull Environ Contam Toxicol 80, 351–355 (2008). https://doi.org/10.1007/s00128-008-9387-8

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Keywords

  • Acid volatile sulfide (AVS)
  • Simultaneously extracted metals (SEM)
  • Sulfide-bound phase
  • Taihu Lake