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cje ›› 2011, Vol. 30 ›› Issue (05): 1004-1007.

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Mercury distribution and speciation in the sediments of mangrove wetland in Quanzhou Bay.

YU Rui-lian1,2**, HU Gong-ren1, LIU Yue1, YANG Yi1   

  1. 1Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, Fujian, China|2Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, Fujian, China
  • Online:2011-05-08 Published:2011-05-08

Abstract: Surface sediments were sampled from the mangrove wetland in Quanzhou Bay to study the distribution, speciation, and bio-availability of mercury in the sediments. The total mercury content in the sediments ranged in 0.03-0.22 mg·kg-1, which met the first class standard of Marine Sediment Quality (GB 18668-2002), with the exception of that at site 14. The average proportion of different speciation mercury to total mercury in the sediments presented a sequence of oxidizable (84.0%) > residual (14.0%) > reducible (1.8%) > weak acid soluble (0.2%). The relatively high bio-availability of mercury in the sediments indicated certain potential hazard to the mangrove ecosystem.

Key words: Vetiveria zizanioids, Eutrophication, Purification of water body