J4 ›› 2011, Vol. 41 ›› Issue (4): 1166-1171.

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Trace Metal Occurence in Sediments and Its Bearing on Pyritization from Taizhou Bay, Zhejiang

YE Si-yuan1,2, DING Xi-gui1,2, YUAN Hong-ming1,2, ZHAO Guang-ming1,2,WANG Jin1,2   

  1. 1.Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology,Ministry of Land and Resources|Qingdao266071, Shandong, China;
    2.Qingdao Institute of Marine Geology, China Geological Survey,Qingdao266071, Shandong, China
  • Received:2010-10-12 Online:2011-07-26 Published:2011-07-26

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Abstract:

Three undisturbed samples were collected in intertidal zone in the Taizhou Bay of Zhejiang Province, China. Reactive and pyrite fractions of trace metals in the sediments were obtained using sequential extraction method, meanwhile, acid volatile sulfide (AVS) was measured by cold diffusion method. The results indicated that the degree of pyritization (DOP) of trace metals in the study area was low and trace metals were very active and liable to take part in biogeochemical cycle, but elements differed greatly in degree of trace metal pyritization (DTMP): As and Hg underwent most significant pyritization, Cu, Zn, Cd, Cr, and Ni moderately, and Pb and Mn the least. Factors that controlled the degrees of pyritization depended upon whether there was abundant organic carbon (OrgC) and AVS in the sediments and also upon the presence of an anoxic reducing system. Concentrations of the reactive trace metals were not a limiting factor in the present study.

Key words: sediments, trace metals, reactive fraction, pyrite fraction, Taizhou Bay

CLC Number: 

  • X82
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