RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2006, Vol. 15 >> Issue (3): 388-393.

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PHYSICALCHEMICAL CHARACTERISTICS AND FORM OF PHOSPHORUS SPECIATIONS IN THE SEDIMENTS OF NORTHEAST LAKE TAIHU

JIN Xiang-can1, MENG Fan-de2, JIANG Xia1, WANG Xiao-yan2, PANG Yan1   

  • Received:2005-02-10 Revised:2005-05-09 Online:2006-05-20
  • Contact: JIN Xiang-can

Abstract: The physical and chemical characteristics, various phosphorous forms from 8 sites in Lake Taihu's sediments were analyzed, and their relations were discussed. The results showed that，the values of total phosphorous, cation exchange capacity and organic matter are 307.43～1454.39 mg/kg, 15.18～22.68 meq/100g, 1.66%～3.45% , respectively; the main mineral compositions of the sediments are quartz and albite; the main clay minerals（<2 μm）are montmorillonate, illite, chlorite and kaolinite. The common composition of the sediments are mainly made up of SiO2, Al2O3 and TFe2O3, and their contents change greatly as the values of total phosphorous change. Close relations between physicalchemical characteristics and various phosphorous forms exist in the sediments of Lake Taihu. As the concentrations of total phosphorous increase, the values of cation exchange capacity, organic matter and clay increase, at the same time, the proportion of Fe/AlP in TP increase.

Key words: phosphorous forms, sediment, physicalchemical characteristics, Lake Taihu

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