Environmental Earth Sciences

, Volume 62, Issue 8, pp 1643–1653 | Cite as

Phosphorus distribution in the sediments of a shallow eutrophic lake, Lake Chaohu, China

  • Fengyu Zan
  • Shouliang Huo
  • Beidou Xi
  • Qingqin Li
  • Haiqing Liao
  • Jingtian Zhang
Original Article


In this study, the sediment profiles of total phosphorus (TP), inorganic phosphorus (Pi), organic phosphorus (Po), C/P and N/P were used to investigate time-dependent P distribution changes in Lake Chaohu. The characteristics of Pi and Po fractions in the surface sediments were studied and the difference between east and west lake region was also discussed. The Pi and Po contents displayed a clear gradient from east to west in sediments of Lake Chaohu, and the Po/P ratios were lower in sediments with industrial and urban pollution sources input in west lake region. The study indicated that different sediments area had diverse concentrations and distributions of Po fractions due to their different drainage basin and pollution sources. The profile distribution of the C/P and N/P ratios decreased with increasing depths and stayed relatively constant ratios at the depths of 15–30 cm. The C/P and N/P ratios were always below Redfield ratios in sediment profile, indicating P enrichment but likely due to the preferential loss of carbon in respect to phosphorus. The rank order of Pi-fractions extracted was HCl-Pi > NaOH-Pi > NaHCO3-Pi in surface sediments. The relative distribution of NaHCO3-Pi and HCl-Pi was in agreement with the trophic conditions of the regions studied. Among the sequentially extracted Po forms, the rank order of Po fractions was residual Po > HCl-Po > fulvic acid-P > humic acid-P > NaHCO3-Po, with mean relative proportion of 5.4:3.4:2.2:1.1:1.0.


Organic phosphorus Phosphorus distribution Lake sediment Eutrophication 



This study is supported by the Major Special Technological Program of Water Pollution Control and Management (Program No. 2009ZX07106-001), the National Natural Science Foundation of China (No. 40901248) and the China Basic Research Program (Program No. 2008CB418206).


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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Fengyu Zan
    • 1
    • 3
  • Shouliang Huo
    • 2
  • Beidou Xi
    • 2
  • Qingqin Li
    • 2
  • Haiqing Liao
    • 2
  • Jingtian Zhang
    • 2
  1. 1.Environment SchoolBeijing Normal UniversityBeijingChina
  2. 2.Chinese Research Academy of Environmental ScienceBeijingChina
  3. 3.College of Environmental ScienceAnhui Normal UniversityWuhuChina

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