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Speciation Changes of Cadmium in Mangrove (Kandelia candel (L.)) Rhizosphere Sediments

Abstract

The speciation distribution of cadmium (Cd) in mangrove (Kandelia candel (L.) Druce) rhizosphere sediment was investigated after different contents of Cd being loaded. The study results indicated that root induced changes of Cd bioavailability in the rhizosphere. Exchangeable and carbonate bound Cd in the rhizosphere sediments were lower than these in the bulk sediments, whilst an increase in Fe–Mn oxides bound and O.M/sulfide bound fractions occurred in the rhizosphere sediment. Increased levels of Cd in sediments resulted in higher Cd concentrations in mangrove plants, and the order of accumulation was: roots > hypocotyls > stems and leaves.

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Acknowledgements

This work was financially supported by the Natural Science Foundation of China (No. 30470301, 30530150, 40673064), and “Program for innovative Research Team in Science and Technology in Fujian Province University”. The authors also thank Dr John R. Merefield of Department of Lifelong Learning, University of Exeter for encouragement and suggestive comments.

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Correspondence to Yan Chongling.

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Jingchun, L., Chongling, Y., Ruifeng, Z. et al. Speciation Changes of Cadmium in Mangrove (Kandelia candel (L.)) Rhizosphere Sediments. Bull Environ Contam Toxicol 80, 231–236 (2008). https://doi.org/10.1007/s00128-007-9351-z

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Keywords

  • Cadmium
  • Kandelia candel (L.)
  • Rhizosphere
  • Speciation