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Environmental Earth Sciences

, Volume 64, Issue 1, pp 185–192 | Cite as

Speciation and phytoavailability of heavy metals in sediments in Nanjing section of Changjiang River

  • Hongrui Ma
  • Li HuaEmail author
  • Junfeng Ji
Original Article

Abstract

Heavy metal pollution and their fractionations in the sediments of Changjiang River in Nanjing Reach was monitored for cadmium (Cd), lead (Pb), zinc (Zn), chromium (Cr), and copper (Cu). Moreover, the biological enrichment of metals by riverine plants was studied. The results demonstrated there were highly significant variations among different sampling stations for the concentrations of tested metals. The highest range was for Cu (38.8–120.4 mg kg−1), followed by Cr (74.4–120.0 mg kg−1), Zn (80.9–121.1 mg kg−1), Ni (26.0–55.5 mg kg−1), Pb (15.8–46.7 mg kg−1) and Cd (0.28–0.48 mg kg−1). Cd was the element with highest biological enrichment factor (BEF). The highest BEF of Cd in Erigeron bonariensis reached 3.0, indicating a significant Cd enrichment in this aquatic plant. In addition, 60% of Cd was found in reducible fraction and exchangeable and acid-soluble fraction, which was consistent with its high mobility. The consistency of Cd fraction in sediment and suspended particle indicated they came from the same source. Accumulated Cd concentration calculated according to the release curve showed significant relativity with the total Cd concentration in the sediment.

Keywords

Heavy metal Speciation Sediment Phytoavailability 

Notes

Acknowledgments

This study was partially supported by Natural Science Fund of Jiangsu province (BK2004091), Project of Shaanxi Education Department (07JK187). We are appreciating to Dr. Murray B. McBride for his help in improving the English of our manuscript.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.College of Resource and EnvironmentShaanxi University of Science and TechnologyXi’anChina
  2. 2.State Key Laboratory of Mineral Deposit Research, Department of Earth Sciences, Institute of Surficial GeochemistryNanjing UniversityNanjingChina

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